ATMEGA48P-20MMUR [ATMEL]

RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQCC28, 4 X 4 MM, 1 MM HEIGHT, 0.45 MM PITCH, GREEN, PLASTIC, VQFN-28;
ATMEGA48P-20MMUR
型号: ATMEGA48P-20MMUR
厂家: ATMEL    ATMEL
描述:

RISC Microcontroller, 8-Bit, FLASH, AVR RISC CPU, 20MHz, CMOS, PQCC28, 4 X 4 MM, 1 MM HEIGHT, 0.45 MM PITCH, GREEN, PLASTIC, VQFN-28

时钟 微控制器 外围集成电路 闪存
文件: 总27页 (文件大小:335K)
中文:  中文翻译
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Features  
High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller  
Advanced RISC Architecture  
– 131 Powerful Instructions – Most Single Clock Cycle Execution  
– 32 x 8 General Purpose Working Registers  
– Fully Static Operation  
– Up to 20 MIPS Throughput at 20 MHz  
– On-chip 2-cycle Multiplier  
High Endurance Non-volatile Memory Segments  
– 4/8/16KBytes of In-System Self-Programmable Flash progam memory  
– 256/512/512Bytes EEPROM  
– 512/1K/1KBytes Internal SRAM  
8-bit Atmel  
– Write/Erase Cycles: 10,000 Flash/100,000 EEPROM  
– Data retention: 20 years at 85°C/100 years at 25°C(1)  
– Optional Boot Code Section with Independent Lock Bits  
In-System Programming by On-chip Boot Program  
True Read-While-Write Operation  
Microcontroller  
with 4/8/16K  
Bytes In-System  
Programmable  
Flash  
– Programming Lock for Software Security  
QTouch® library support  
– Capacitive touch buttons, sliders and wheels  
– QTouch and QMatrix acquisition  
– Up to 64 sense channels  
Peripheral Features  
– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode  
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture  
Mode  
– Real Time Counter with Separate Oscillator  
– Six PWM Channels  
– 8-channel 10-bit ADC in TQFP and QFN/MLF package  
Temperature Measurement  
ATmega48P/V  
ATmega88P/V  
ATmega168P/V  
– 6-channel 10-bit ADC in PDIP Package  
Temperature Measurement  
– Programmable Serial USART  
– Master/Slave SPI Serial Interface  
– Byte-oriented 2-wire Serial Interface (Philips I2C compatible)  
– Programmable Watchdog Timer with Separate On-chip Oscillator  
– On-chip Analog Comparator  
– Interrupt and Wake-up on Pin Change  
Special Microcontroller Features  
– Power-on Reset and Programmable Brown-out Detection  
– Internal Calibrated Oscillator  
– External and Internal Interrupt Sources  
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby,  
and Extended Standby  
Summary  
I/O and Packages  
– 23 Programmable I/O Lines  
– 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF  
Operating Voltage:  
– 1.8 - 5.5V for ATmega48P/88P/168PV  
– 2.7 - 5.5V for ATmega48P/88P/168P  
Temperature Range:  
– -40°C to 85°C  
Speed Grade:  
ATmega48P/88P/168PV: 0 - 4MHz @ 1.8 - 5.5V, 0 - 10MHz @ 2.7 - 5.5V  
ATmega48P/88P/168P: 0 - 10MHz @ 2.7 - 5.5V, 0 - 20MHz @ 4.5 - 5.5V  
Low Power Consumption at 1MHz, 1.8V, 25°C:  
– Active Mode: 0.3mA  
– Power-down Mode: 0.1µA  
– Power-save Mode: 0.8µA (Including 32kHz RTC)  
Note:  
1. See ”Data Retention” on page 8 for details.  
Rev. 8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
1. Pin Configurations  
Figure 1-1. Pinout ATmega48P/88P/168P  
PDIP  
TQFP Top View  
(PCINT14/RESET) PC6  
(PCINT16/RXD) PD0  
(PCINT17/TXD) PD1  
(PCINT18/INT0) PD2  
(PCINT19/OC2B/INT1) PD3  
(PCINT20/XCK/T0) PD4  
VCC  
1
2
3
4
5
6
7
8
9
28 PC5 (ADC5/SCL/PCINT13)  
27 PC4 (ADC4/SDA/PCINT12)  
26 PC3 (ADC3/PCINT11)  
25 PC2 (ADC2/PCINT10)  
24 PC1 (ADC1/PCINT9)  
23 PC0 (ADC0/PCINT8)  
22 GND  
(PCINT19/OC2B/INT1) PD3  
1
2
3
4
5
6
7
8
24 PC1 (ADC1/PCINT9)  
23 PC0 (ADC0/PCINT8)  
22 ADC7  
(PCINT20/XCK/T0) PD4  
GND  
VCC  
GND  
21 GND  
20 AREF  
GND  
21 AREF  
VCC  
19 ADC6  
(PCINT6/XTAL1/TOSC1) PB6  
20 AVCC  
(PCINT6/XTAL1/TOSC1) PB6  
(PCINT7/XTAL2/TOSC2) PB7  
18 AVCC  
(PCINT7/XTAL2/TOSC2) PB7 10  
(PCINT21/OC0B/T1) PD5 11  
(PCINT22/OC0A/AIN0) PD6 12  
(PCINT23/AIN1) PD7 13  
19 PB5 (SCK/PCINT5)  
18 PB4 (MISO/PCINT4)  
17 PB3 (MOSI/OC2A/PCINT3)  
16 PB2 (SS/OC1B/PCINT2)  
15 PB1 (OC1A/PCINT1)  
17 PB5 (SCK/PCINT5)  
(PCINT0/CLKO/ICP1) PB0 14  
32 MLF Top View  
28 MLF Top View  
(PCINT19/OC2B/INT1) PD3  
PC1 (ADC1/PCINT9)  
PC0 (ADC0/PCINT8)  
ADC7  
1
2
3
4
5
6
7
8
24  
23  
22  
21  
20  
19  
18  
17  
(PCINT19/OC2B/INT1) PD3  
(PCINT20/XCK/T0) PD4  
VCC  
PC2 (ADC2/PCINT10)  
PC1 (ADC1/PCINT9)  
PC0 (ADC0/PCINT8)  
GND  
1
2
3
4
5
6
7
21  
20  
19  
18  
17  
16  
15  
(PCINT20/XCK/T0) PD4  
GND  
VCC  
GND  
GND  
GND  
AREF  
(PCINT6/XTAL1/TOSC1) PB6  
(PCINT7/XTAL2/TOSC2) PB7  
(PCINT21/OC0B/T1) PD5  
AREF  
VCC  
ADC6  
AVCC  
(PCINT6/XTAL1/TOSC1) PB6  
(PCINT7/XTAL2/TOSC2) PB7  
AVCC  
PB5 (SCK/PCINT5)  
PB5 (SCK/PCINT5)  
NOTE: Bottom pad should be soldered to ground.  
NOTE: Bottom pad should be soldered to ground.  
2
8025MS–AVR–6/11  
ATmega48P/88P/168P  
1.1  
Pin Descriptions  
1.1.1  
VCC  
Digital supply voltage.  
1.1.2  
1.1.3  
GND  
Ground.  
Port B (PB7:0) XTAL1/XTAL2/TOSC1/TOSC2  
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The  
Port B output buffers have symmetrical drive characteristics with both high sink and source  
capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up  
resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,  
even if the clock is not running.  
Depending on the clock selection fuse settings, PB6 can be used as input to the inverting Oscil-  
lator amplifier and input to the internal clock operating circuit.  
Depending on the clock selection fuse settings, PB7 can be used as output from the inverting  
Oscillator amplifier.  
If the Internal Calibrated RC Oscillator is used as chip clock source, PB7:6 is used as TOSC2:1  
input for the Asynchronous Timer/Counter2 if the AS2 bit in ASSR is set.  
The various special features of Port B are elaborated in ”Alternate Functions of Port B” on page  
80 and ”System Clock and Clock Options” on page 27.  
1.1.4  
1.1.5  
Port C (PC5:0)  
PC6/RESET  
Port C is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The  
PC5:0 output buffers have symmetrical drive characteristics with both high sink and source  
capability. As inputs, Port C pins that are externally pulled low will source current if the pull-up  
resistors are activated. The Port C pins are tri-stated when a reset condition becomes active,  
even if the clock is not running.  
If the RSTDISBL Fuse is programmed, PC6 is used as an I/O pin. Note that the electrical char-  
acteristics of PC6 differ from those of the other pins of Port C.  
If the RSTDISBL Fuse is unprogrammed, PC6 is used as a Reset input. A low level on this pin  
for longer than the minimum pulse length will generate a Reset, even if the clock is not running.  
The minimum pulse length is given in Table 29-3 on page 314. Shorter pulses are not guaran-  
teed to generate a Reset.  
The various special features of Port C are elaborated in ”Alternate Functions of Port C” on page  
83.  
1.1.6  
Port D (PD7:0)  
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The  
Port D output buffers have symmetrical drive characteristics with both high sink and source  
capability. As inputs, Port D pins that are externally pulled low will source current if the pull-up  
resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,  
even if the clock is not running.  
3
8025MS–AVR–6/11  
ATmega48P/88P/168P  
The various special features of Port D are elaborated in ”Alternate Functions of Port D” on page  
86.  
1.1.7  
AVCC  
AVCC is the supply voltage pin for the A/D Converter, PC3:0, and ADC7:6. It should be externally  
connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC  
through a low-pass filter. Note that PC6:4 use digital supply voltage, VCC  
.
1.1.8  
1.1.9  
AREF  
AREF is the analog reference pin for the A/D Converter.  
ADC7:6 (TQFP and QFN/MLF Package Only)  
In the TQFP and QFN/MLF package, ADC7:6 serve as analog inputs to the A/D converter.  
These pins are powered from the analog supply and serve as 10-bit ADC channels.  
2. Overview  
The ATmega48P/88P/168P is a low-power CMOS 8-bit microcontroller based on the AVR  
enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the  
ATmega48P/88P/168P achieves throughputs approaching 1 MIPS per MHz allowing the system  
designer to optimize power consumption versus processing speed.  
4
8025MS–AVR–6/11  
ATmega48P/88P/168P  
2.1  
Block Diagram  
Figure 2-1. Block Diagram  
Watchdog  
Timer  
Power  
Supervision  
POR / BOD &  
RESET  
debugWIRE  
Watchdog  
Oscillator  
PROGRAM  
LOGIC  
Oscillator  
Circuits /  
Clock  
Flash  
SRAM  
Generation  
CPU  
EEPROM  
AVCC  
AREF  
GND  
2
8bit T/C 0  
8bit T/C 2  
16bit T/C 1  
A/D Conv.  
Analog  
Comp.  
Internal  
Bandgap  
6
USART 0  
PORT D (8)  
PD[0..7]  
SPI  
PORT B (8)  
PB[0..7]  
TWI  
PORT C (7)  
PC[0..6]  
RESET  
XTAL[1..2]  
ADC[6..7]  
5
8025MS–AVR–6/11  
ATmega48P/88P/168P  
The AVR core combines a rich instruction set with 32 general purpose working registers. All the  
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent  
registers to be accessed in one single instruction executed in one clock cycle. The resulting  
architecture is more code efficient while achieving throughputs up to ten times faster than con-  
ventional CISC microcontrollers.  
The ATmega48P/88P/168P provides the following features: 4K/8K/16Kbytes of In-System Pro-  
grammable Flash with Read-While-Write capabilities, 256/512/512bytes EEPROM,  
512/1K/1Kbytes SRAM, 23 general purpose I/O lines, 32 general purpose working registers,  
three flexible Timer/Counters with compare modes, internal and external interrupts, a serial pro-  
grammable USART, a byte-oriented, 2-wire Serial Interface, an SPI serial port, a 6-channel 10-  
bit ADC (8 channels in TQFP and QFN/MLF packages), a programmable Watchdog Timer with  
internal Oscillator, and five software selectable power saving modes. The Idle mode stops the  
CPU while allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI port, and  
interrupt system to continue functioning. The Power-down mode saves the register contents but  
freezes the Oscillator, disabling all other chip functions until the next interrupt or hardware reset.  
In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a  
timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the  
CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise dur-  
ing ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the rest  
of the device is sleeping. This allows very fast start-up combined with low power consumption.  
Atmel offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels  
functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offers  
robust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key  
Suppression® (AKS) technology for unambiguous detection of key events. The easy-to-use  
QTouch Suite toolchain allows you to explore, develop and debug your own touch applications.  
The device is manufactured using Atmel’s high density non-volatile memory technology. The  
On-chip ISP Flash allows the program memory to be reprogrammed In-System through an SPI  
serial interface, by a conventional non-volatile memory programmer, or by an On-chip Boot pro-  
gram running on the AVR core. The Boot program can use any interface to download the  
application program in the Application Flash memory. Software in the Boot Flash section will  
continue to run while the Application Flash section is updated, providing true Read-While-Write  
operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a  
monolithic chip, the Atmel ATmega48P/88P/168P is a powerful microcontroller that provides a  
highly flexible and cost effective solution to many embedded control applications.  
The ATmega48P/88P/168P AVR is supported with a full suite of program and system develop-  
ment tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit  
Emulators, and Evaluation kits.  
6
8025MS–AVR–6/11  
ATmega48P/88P/168P  
2.2  
Comparison Between ATmega48P, ATmega88P and ATmega168P  
The ATmega48P, ATmega88P and ATmega168P differ only in memory sizes, boot loader sup-  
port, and interrupt vector sizes. Table 2-1 summarizes the different memory and interrupt vector  
sizes for the three devices.  
Table 2-1.  
Device  
Memory Size Summary  
Flash  
EEPROM  
RAM  
Interrupt Vector Size  
1 instruction word/vector  
1 instruction word/vector  
2 instruction words/vector  
ATmega48P  
ATmega88P  
ATmega168P  
4KBytes  
8KBytes  
16KBytes  
256Bytes  
512Bytes  
512Bytes  
512Bytes  
1KBytes  
1KBytes  
ATmega88P and ATmega168P support a real Read-While-Write Self-Programming mechanism.  
There is a separate Boot Loader Section, and the SPM instruction can only execute from there.  
In ATmega48P, there is no Read-While-Write support and no separate Boot Loader Section.  
The SPM instruction can execute from the entire Flash.  
7
8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
3. Resources  
A comprehensive set of development tools, application notes and datasheets are available for  
download on http://www.atmel.com/avr.  
Note:  
1.  
4. Data Retention  
Reliability Qualification results show that the projected data retention failure rate is much less  
than 1 PPM over 20 years at 85°C or 100 years at 25°C.  
5. About Code Examples  
This documentation contains simple code examples that briefly show how to use various parts of  
the device. These code examples assume that the part specific header file is included before  
compilation. Be aware that not all C compiler vendors include bit definitions in the header files  
and interrupt handling in C is compiler dependent. Please confirm with the C compiler documen-  
tation for more details.  
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”  
instructions must be replaced with instructions that allow access to extended I/O. Typically  
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.  
6. Capacitive touch sensing  
The Atmel® QTouch® Library provides a simple to use solution to realize touch sensitive inter-  
faces on most Atmel AVR® microcontrollers. The QTouch Library includes support for the  
QTouch and QMatrix® acquisition methods.  
Touch sensing can be added to any application by linking the appropriate Atmel QTouch Library  
for the AVR Microcontroller. This is done by using a simple set of APIs to define the touch chan-  
nels and sensors, and then calling the touch sensing API’s to retrieve the channel information  
and determine the touch sensor states.  
The QTouch Library is FREE and downloadable from the Atmel website at the following location:  
www.atmel.com/qtouchlibrary. For implementation details and other information, refer to the  
Atmel QTouch Library User Guide - also available for download from the Atmel website.  
8
8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
7. Register Summary  
Address  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Page  
(0xFF)  
(0xFE)  
(0xFD)  
(0xFC)  
(0xFB)  
(0xFA)  
(0xF9)  
(0xF8)  
(0xF7)  
(0xF6)  
(0xF5)  
(0xF4)  
(0xF3)  
(0xF2)  
(0xF1)  
(0xF0)  
(0xEF)  
(0xEE)  
(0xED)  
(0xEC)  
(0xEB)  
(0xEA)  
(0xE9)  
(0xE8)  
(0xE7)  
(0xE6)  
(0xE5)  
(0xE4)  
(0xE3)  
(0xE2)  
(0xE1)  
(0xE0)  
(0xDF)  
(0xDE)  
(0xDD)  
(0xDC)  
(0xDB)  
(0xDA)  
(0xD9)  
(0xD8)  
(0xD7)  
(0xD6)  
(0xD5)  
(0xD4)  
(0xD3)  
(0xD2)  
(0xD1)  
(0xD0)  
(0xCF)  
(0xCE)  
(0xCD)  
(0xCC)  
(0xCB)  
(0xCA)  
(0xC9)  
(0xC8)  
(0xC7)  
(0xC6)  
(0xC5)  
(0xC4)  
(0xC3)  
(0xC2)  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
UDR0  
USART I/O Data Register  
193  
197  
197  
UBRR0H  
UBRR0L  
Reserved  
UCSR0C  
USART Baud Rate Register High  
USART Baud Rate Register Low  
UCSZ01 /UDORD0  
UCSZ00 / UCPHA0  
UMSEL01  
UMSEL00  
UPM01  
UPM00  
USBS0  
UCPOL0  
195/210  
9
8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
Address  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Page  
(0xC1)  
(0xC0)  
(0xBF)  
(0xBE)  
(0xBD)  
(0xBC)  
(0xBB)  
(0xBA)  
(0xB9)  
(0xB8)  
(0xB7)  
(0xB6)  
(0xB5)  
(0xB4)  
(0xB3)  
(0xB2)  
(0xB1)  
(0xB0)  
(0xAF)  
(0xAE)  
(0xAD)  
(0xAC)  
(0xAB)  
(0xAA)  
(0xA9)  
(0xA8)  
(0xA7)  
(0xA6)  
(0xA5)  
(0xA4)  
(0xA3)  
(0xA2)  
(0xA1)  
(0xA0)  
(0x9F)  
(0x9E)  
(0x9D)  
(0x9C)  
(0x9B)  
(0x9A)  
(0x99)  
(0x98)  
(0x97)  
(0x96)  
(0x95)  
(0x94)  
(0x93)  
(0x92)  
(0x91)  
(0x90)  
(0x8F)  
(0x8E)  
(0x8D)  
(0x8C)  
(0x8B)  
(0x8A)  
(0x89)  
(0x88)  
(0x87)  
(0x86)  
(0x85)  
(0x84)  
(0x83)  
(0x82)  
(0x81)  
(0x80)  
UCSR0B  
UCSR0A  
Reserved  
Reserved  
TWAMR  
TWCR  
RXCIE0  
RXC0  
TXCIE0  
TXC0  
UDRIE0  
UDRE0  
RXEN0  
FE0  
TXEN0  
DOR0  
UCSZ02  
UPE0  
RXB80  
TXB80  
194  
193  
U2X0  
MPCM0  
TWAM0  
TWAM6  
TWINT  
TWAM5  
TWEA  
TWAM4  
TWSTA  
TWAM3  
TWSTO  
TWAM2  
TWWC  
TWAM1  
TWEN  
242  
239  
241  
242  
241  
239  
TWIE  
TWDR  
2-wire Serial Interface Data Register  
TWAR  
TWA6  
TWS7  
TWA5  
TWS6  
TWA4  
TWS5  
TWA3  
TWS4  
TWA2  
TWS3  
TWA1  
TWA0  
TWGCE  
TWPS0  
TWSR  
TWPS1  
TWBR  
2-wire Serial Interface Bit Rate Register  
Reserved  
ASSR  
AS2  
TCN2UB  
OCR2AUB  
OCR2BUB  
TCR2AUB  
TCR2BUB  
EXCLK  
162  
Reserved  
OCR2B  
Timer/Counter2 Output Compare Register B  
Timer/Counter2 Output Compare Register A  
Timer/Counter2 (8-bit)  
160  
160  
160  
159  
OCR2A  
TCNT2  
TCCR2B  
TCCR2A  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
OCR1BH  
OCR1BL  
OCR1AH  
OCR1AL  
ICR1H  
FOC2A  
FOC2B  
WGM22  
CS22  
CS21  
CS20  
COM2A1  
COM2A0  
COM2B1  
COM2B0  
WGM21  
WGM20  
156  
Timer/Counter1 - Output Compare Register B High Byte  
Timer/Counter1 - Output Compare Register B Low Byte  
Timer/Counter1 - Output Compare Register A High Byte  
Timer/Counter1 - Output Compare Register A Low Byte  
Timer/Counter1 - Input Capture Register High Byte  
Timer/Counter1 - Input Capture Register Low Byte  
Timer/Counter1 - Counter Register High Byte  
136  
136  
136  
136  
137  
137  
136  
136  
ICR1L  
TCNT1H  
TCNT1L  
Reserved  
TCCR1C  
TCCR1B  
TCCR1A  
Timer/Counter1 - Counter Register Low Byte  
FOC1A  
ICNC1  
COM1A1  
FOC1B  
ICES1  
COM1A0  
WGM12  
135  
134  
132  
WGM13  
COM1B0  
CS12  
CS11  
WGM11  
CS10  
WGM10  
COM1B1  
10  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
Address  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Page  
(0x7F)  
(0x7E)  
DIDR1  
DIDR0  
ADC3D  
AIN1D  
ADC1D  
AIN0D  
ADC0D  
247  
264  
ADC5D  
ADC4D  
ADC2D  
(0x7D)  
Reserved  
ADMUX  
ADCSRB  
ADCSRA  
ADCH  
(0x7C)  
REFS1  
REFS0  
ACME  
ADSC  
ADLAR  
MUX3  
MUX2  
ADTS2  
ADPS2  
MUX1  
ADTS1  
ADPS1  
MUX0  
ADTS0  
ADPS0  
260  
263  
261  
263  
263  
(0x7B)  
(0x7A)  
ADEN  
ADATE  
ADIF  
ADIE  
(0x79)  
ADC Data Register High byte  
ADC Data Register Low byte  
(0x78)  
ADCL  
(0x77)  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
TIMSK2  
TIMSK1  
TIMSK0  
PCMSK2  
PCMSK1  
PCMSK0  
Reserved  
EICRA  
(0x76)  
(0x75)  
(0x74)  
(0x73)  
(0x72)  
(0x71)  
(0x70)  
OCIE2B  
OCIE1B  
OCIE0B  
PCINT18  
PCINT10  
PCINT2  
OCIE2A  
OCIE1A  
OCIE0A  
PCINT17  
PCINT9  
PCINT1  
TOIE2  
TOIE1  
TOIE0  
PCINT16  
PCINT8  
PCINT0  
161  
137  
109  
72  
(0x6F)  
ICIE1  
(0x6E)  
PCINT19  
PCINT11  
PCINT3  
(0x6D)  
PCINT23  
PCINT22  
PCINT21  
PCINT20  
(0x6C)  
PCINT14  
PCINT13  
PCINT12  
72  
(0x6B)  
PCINT7  
PCINT6  
PCINT5  
PCINT4  
72  
(0x6A)  
(0x69)  
ISC11  
ISC10  
PCIE2  
ISC01  
PCIE1  
ISC00  
PCIE0  
69  
(0x68)  
PCICR  
(0x67)  
Reserved  
OSCCAL  
Reserved  
PRR  
(0x66)  
Oscillator Calibration Register  
38  
43  
(0x65)  
(0x64)  
PRTWI  
PRTIM2  
PRTIM0  
PRTIM1  
PRSPI  
PRUSART0  
PRADC  
(0x63)  
Reserved  
Reserved  
CLKPR  
(0x62)  
(0x61)  
CLKPCE  
CLKPS3  
CLKPS2  
CLKPS1  
CLKPS0  
38  
55  
10  
13  
13  
(0x60)  
WDTCSR  
SREG  
WDIF  
WDIE  
WDP3  
WDCE  
WDE  
WDP2  
WDP1  
WDP0  
0x3F (0x5F)  
0x3E (0x5E)  
0x3D (0x5D)  
0x3C (0x5C)  
0x3B (0x5B)  
0x3A (0x5A)  
0x39 (0x59)  
0x38 (0x58)  
0x37 (0x57)  
0x36 (0x56)  
0x35 (0x55)  
0x34 (0x54)  
0x33 (0x53)  
0x32 (0x52)  
0x31 (0x51)  
0x30 (0x50)  
0x2F (0x4F)  
0x2E (0x4E)  
0x2D (0x4D)  
0x2C (0x4C)  
0x2B (0x4B)  
0x2A (0x4A)  
0x29 (0x49)  
0x28 (0x48)  
0x27 (0x47)  
0x26 (0x46)  
0x25 (0x45)  
0x24 (0x44)  
0x23 (0x43)  
0x22 (0x42)  
0x21 (0x41)  
0x20 (0x40)  
0x1F (0x3F)  
0x1E (0x3E)  
I
T
H
S
V
N
Z
C
SPH  
(SP10) 5.  
SP9  
SP8  
SPL  
SP7  
SP6  
SP5  
SP4  
SP3  
SP2  
SP1  
SP0  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
SPMCSR  
Reserved  
MCUCR  
MCUSR  
SMCR  
PGERS  
SPMIE  
(RWWSB)5.  
(RWWSRE)5.  
BLBSET  
PGWRT  
SELFPRGEN  
289  
PUD  
IVCE  
PORF  
SE  
BODS  
BODSE  
IVSEL  
EXTRF  
SM0  
45/66/90  
55  
WDRF  
SM2  
BORF  
SM1  
41  
Reserved  
Reserved  
ACSR  
ACBG  
ACD  
ACO  
ACI  
ACIE  
ACIC  
ACIS1  
ACIS0  
245  
Reserved  
SPDR  
SPI Data Register  
173  
172  
171  
26  
SPSR  
SPIF  
SPIE  
WCOL  
SPE  
SPI2X  
SPR0  
SPCR  
DORD  
MSTR  
CPOL  
CPHA  
SPR1  
GPIOR2  
GPIOR1  
Reserved  
OCR0B  
OCR0A  
TCNT0  
General Purpose I/O Register 2  
General Purpose I/O Register 1  
26  
Timer/Counter0 Output Compare Register B  
Timer/Counter0 Output Compare Register A  
Timer/Counter0 (8-bit)  
TCCR0B  
TCCR0A  
GTCCR  
EEARH  
EEARL  
FOC0A  
COM0A1  
TSM  
FOC0B  
COM0A0  
COM0B1  
COM0B0  
WGM02  
CS02  
CS01  
CS00  
WGM01  
PSRASY  
WGM00  
PSRSYNC  
141/163  
22  
(EEPROM Address Register High Byte) 5.  
EEPROM Address Register Low Byte  
EEPROM Data Register  
22  
EEDR  
22  
EECR  
EEPM1  
EEPM0  
EERIE  
EEMPE  
EEPE  
EERE  
22  
GPIOR0  
General Purpose I/O Register 0  
26  
11  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
Address  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Page  
0x1D (0x3D)  
0x1C (0x3C)  
0x1B (0x3B)  
0x1A (0x3A)  
0x19 (0x39)  
0x18 (0x38)  
0x17 (0x37)  
0x16 (0x36)  
0x15 (0x35)  
0x14 (0x34)  
0x13 (0x33)  
0x12 (0x32)  
0x11 (0x31)  
0x10 (0x30)  
0x0F (0x2F)  
0x0E (0x2E)  
0x0D (0x2D)  
0x0C (0x2C)  
0x0B (0x2B)  
0x0A (0x2A)  
0x09 (0x29)  
0x08 (0x28)  
0x07 (0x27)  
0x06 (0x26)  
0x05 (0x25)  
0x04 (0x24)  
0x03 (0x23)  
0x02 (0x22)  
0x01 (0x21)  
0x0 (0x20)  
EIMSK  
EIFR  
INT1  
INT0  
70  
70  
INTF1  
INTF0  
PCIFR  
PCIF2  
PCIF1  
PCIF0  
Reserved  
Reserved  
Reserved  
TIFR2  
OCF2B  
OCF2A  
TOV2  
161  
138  
TIFR1  
ICF1  
OCF1B  
OCF1A  
TOV1  
TIFR0  
OCF0B  
OCF0A  
TOV0  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
PORTD  
DDRD  
PORTD7  
PORTD6  
DDD6  
PIND6  
PORTC6  
DDC6  
PINC6  
PORTB6  
DDB6  
PINB6  
PORTD5  
DDD5  
PIND5  
PORTC5  
DDC5  
PINC5  
PORTB5  
DDB5  
PINB5  
PORTD4  
DDD4  
PIND4  
PORTC4  
DDC4  
PINC4  
PORTB4  
DDB4  
PINB4  
PORTD3  
DDD3  
PIND3  
PORTC3  
DDC3  
PINC3  
PORTB3  
DDB3  
PINB3  
PORTD2  
DDD2  
PIND2  
PORTC2  
DDC2  
PINC2  
PORTB2  
DDB2  
PINB2  
PORTD1  
DDD1  
PIND1  
PORTC1  
DDC1  
PINC1  
PORTB1  
DDB1  
PINB1  
PORTD0  
DDD0  
PIND0  
PORTC0  
DDC0  
PINC0  
PORTB0  
DDB0  
PINB0  
91  
91  
91  
90  
90  
90  
90  
90  
90  
DDD7  
PIND  
PIND7  
PORTC  
DDRC  
PINC  
PORTB  
DDRB  
PORTB7  
DDB7  
PINB  
PINB7  
Reserved  
Reserved  
Reserved  
Note:  
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses  
should never be written.  
2. I/O Registers within the address range 0x00 - 0x1F are directly bit-accessible using the SBI and CBI instructions. In these  
registers, the value of single bits can be checked by using the SBIS and SBIC instructions.  
3. Some of the Status Flags are cleared by writing a logical one to them. Note that, unlike most other AVRs, the CBI and SBI  
instructions will only operate on the specified bit, and can therefore be used on registers containing such Status Flags. The  
CBI and SBI instructions work with registers 0x00 to 0x1F only.  
4. When using the I/O specific commands IN and OUT, the I/O addresses 0x00 - 0x3F must be used. When addressing I/O  
Registers as data space using LD and ST instructions, 0x20 must be added to these addresses. The ATmega48P/88P/168P  
is a complex microcontroller with more peripheral units than can be supported within the 64 location reserved in Opcode for  
the IN and OUT instructions. For the Extended I/O space from 0x60 - 0xFF in SRAM, only the ST/STS/STD and  
LD/LDS/LDD instructions can be used.  
5. Only valid for ATmega88P/168P.  
12  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
8. Instruction Set Summary  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
ARITHMETIC AND LOGIC INSTRUCTIONS  
ADD  
Rd, Rr  
Rd, Rr  
Rdl,K  
Rd, Rr  
Rd, K  
Rd, Rr  
Rd, K  
Rdl,K  
Rd, Rr  
Rd, K  
Rd, Rr  
Rd, K  
Rd, Rr  
Rd  
Add two Registers  
Rd Rd + Rr  
Z,C,N,V,H  
Z,C,N,V,H  
Z,C,N,V,S  
Z,C,N,V,H  
Z,C,N,V,H  
Z,C,N,V,H  
Z,C,N,V,H  
Z,C,N,V,S  
Z,N,V  
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
ADC  
Add with Carry two Registers  
Add Immediate to Word  
Subtract two Registers  
Subtract Constant from Register  
Subtract with Carry two Registers  
Subtract with Carry Constant from Reg.  
Subtract Immediate from Word  
Logical AND Registers  
Logical AND Register and Constant  
Logical OR Registers  
Rd Rd + Rr + C  
Rdh:Rdl Rdh:Rdl + K  
Rd Rd - Rr  
ADIW  
SUB  
SUBI  
SBC  
Rd Rd - K  
Rd Rd - Rr - C  
Rd Rd - K - C  
Rdh:Rdl Rdh:Rdl - K  
Rd Rd Rr  
SBCI  
SBIW  
AND  
ANDI  
OR  
Rd Rd K  
Z,N,V  
Rd Rd v Rr  
Z,N,V  
ORI  
Logical OR Register and Constant  
Exclusive OR Registers  
One’s Complement  
Rd Rd v K  
Z,N,V  
EOR  
COM  
NEG  
SBR  
Rd Rd Rr  
Z,N,V  
Rd 0xFF Rd  
Rd 0x00 Rd  
Rd Rd v K  
Z,C,N,V  
Z,C,N,V,H  
Z,N,V  
Rd  
Two’s Complement  
Rd,K  
Rd,K  
Rd  
Set Bit(s) in Register  
CBR  
Clear Bit(s) in Register  
Increment  
Rd Rd (0xFF - K)  
Rd Rd + 1  
Z,N,V  
INC  
Z,N,V  
DEC  
Rd  
Decrement  
Rd Rd 1  
Z,N,V  
TST  
Rd  
Test for Zero or Minus  
Clear Register  
Rd Rd Rd  
Z,N,V  
CLR  
Rd  
Rd Rd Rd  
Rd 0xFF  
Z,N,V  
SER  
Rd  
Set Register  
None  
MUL  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Multiply Unsigned  
R1:R0 Rd x Rr  
R1:R0 Rd x Rr  
R1:R0 Rd x Rr  
R1:R0 (Rd x Rr) << 1  
R1:R0 (Rd x Rr) << 1  
R1:R0 (Rd x Rr) << 1  
Z,C  
MULS  
MULSU  
FMUL  
FMULS  
FMULSU  
Multiply Signed  
Z,C  
Multiply Signed with Unsigned  
Fractional Multiply Unsigned  
Fractional Multiply Signed  
Fractional Multiply Signed with Unsigned  
Z,C  
Z,C  
Z,C  
Z,C  
BRANCH INSTRUCTIONS  
RJMP  
k
Relative Jump  
PC PC + k + 1  
None  
None  
None  
None  
None  
None  
None  
I
2
2
IJMP  
Indirect Jump to (Z)  
PC Z  
JMP(1)  
RCALL  
ICALL  
CALL(1)  
RET  
k
k
Direct Jump  
PC k  
3
Relative Subroutine Call  
Indirect Call to (Z)  
PC PC + k + 1  
3
PC Z  
3
k
Direct Subroutine Call  
Subroutine Return  
PC k  
4
PC STACK  
4
RETI  
Interrupt Return  
PC STACK  
4
CPSE  
CP  
Rd,Rr  
Compare, Skip if Equal  
Compare  
if (Rd = Rr) PC PC + 2 or 3  
Rd Rr  
None  
Z, N,V,C,H  
Z, N,V,C,H  
Z, N,V,C,H  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
1/2/3  
1
Rd,Rr  
CPC  
Rd,Rr  
Compare with Carry  
Rd Rr C  
1
CPI  
Rd,K  
Compare Register with Immediate  
Skip if Bit in Register Cleared  
Skip if Bit in Register is Set  
Skip if Bit in I/O Register Cleared  
Skip if Bit in I/O Register is Set  
Branch if Status Flag Set  
Branch if Status Flag Cleared  
Branch if Equal  
Rd K  
1
SBRC  
SBRS  
SBIC  
Rr, b  
if (Rr(b)=0) PC PC + 2 or 3  
if (Rr(b)=1) PC PC + 2 or 3  
if (P(b)=0) PC PC + 2 or 3  
if (P(b)=1) PC PC + 2 or 3  
if (SREG(s) = 1) then PCPC+k + 1  
if (SREG(s) = 0) then PCPC+k + 1  
if (Z = 1) then PC PC + k + 1  
if (Z = 0) then PC PC + k + 1  
if (C = 1) then PC PC + k + 1  
if (C = 0) then PC PC + k + 1  
if (C = 0) then PC PC + k + 1  
if (C = 1) then PC PC + k + 1  
if (N = 1) then PC PC + k + 1  
if (N = 0) then PC PC + k + 1  
if (N V= 0) then PC PC + k + 1  
if (N V= 1) then PC PC + k + 1  
if (H = 1) then PC PC + k + 1  
if (H = 0) then PC PC + k + 1  
if (T = 1) then PC PC + k + 1  
if (T = 0) then PC PC + k + 1  
if (V = 1) then PC PC + k + 1  
if (V = 0) then PC PC + k + 1  
1/2/3  
1/2/3  
1/2/3  
1/2/3  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
1/2  
Rr, b  
P, b  
P, b  
s, k  
s, k  
k
SBIS  
BRBS  
BRBC  
BREQ  
BRNE  
BRCS  
BRCC  
BRSH  
BRLO  
BRMI  
BRPL  
BRGE  
BRLT  
BRHS  
BRHC  
BRTS  
BRTC  
BRVS  
BRVC  
k
Branch if Not Equal  
k
Branch if Carry Set  
k
Branch if Carry Cleared  
Branch if Same or Higher  
Branch if Lower  
k
k
k
Branch if Minus  
k
Branch if Plus  
k
Branch if Greater or Equal, Signed  
Branch if Less Than Zero, Signed  
Branch if Half Carry Flag Set  
Branch if Half Carry Flag Cleared  
Branch if T Flag Set  
k
k
k
k
k
Branch if T Flag Cleared  
Branch if Overflow Flag is Set  
Branch if Overflow Flag is Cleared  
k
k
13  
8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
BRIE  
BRID  
k
k
Branch if Interrupt Enabled  
if ( I = 1) then PC PC + k + 1  
if ( I = 0) then PC PC + k + 1  
None  
1/2  
1/2  
Branch if Interrupt Disabled  
None  
BIT AND BIT-TEST INSTRUCTIONS  
SBI  
P,b  
P,b  
Rd  
Rd  
Rd  
Rd  
Rd  
Rd  
s
Set Bit in I/O Register  
Clear Bit in I/O Register  
Logical Shift Left  
I/O(P,b) 1  
None  
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CBI  
I/O(P,b) 0  
None  
LSL  
Rd(n+1) Rd(n), Rd(0) 0  
Z,C,N,V  
LSR  
ROL  
ROR  
ASR  
SWAP  
BSET  
BCLR  
BST  
BLD  
SEC  
CLC  
SEN  
CLN  
SEZ  
CLZ  
SEI  
Logical Shift Right  
Rd(n) Rd(n+1), Rd(7) 0  
Z,C,N,V  
Rotate Left Through Carry  
Rotate Right Through Carry  
Arithmetic Shift Right  
Swap Nibbles  
Rd(0)C,Rd(n+1)Rd(n),CRd(7)  
Z,C,N,V  
Rd(7)C,Rd(n)Rd(n+1),CRd(0)  
Z,C,N,V  
Rd(n) Rd(n+1), n=0..6  
Z,C,N,V  
Rd(3..0)Rd(7..4),Rd(7..4)Rd(3..0)  
None  
Flag Set  
SREG(s) 1  
SREG(s) 0  
T Rr(b)  
Rd(b) T  
C 1  
SREG(s)  
s
Flag Clear  
SREG(s)  
Rr, b  
Rd, b  
Bit Store from Register to T  
Bit load from T to Register  
Set Carry  
T
None  
C
C
N
N
Z
Clear Carry  
C 0  
Set Negative Flag  
N 1  
Clear Negative Flag  
Set Zero Flag  
N 0  
Z 1  
Clear Zero Flag  
Z 0  
Z
Global Interrupt Enable  
Global Interrupt Disable  
Set Signed Test Flag  
Clear Signed Test Flag  
Set Twos Complement Overflow.  
Clear Twos Complement Overflow  
Set T in SREG  
I 1  
I
CLI  
I 0  
I
SES  
CLS  
SEV  
CLV  
SET  
CLT  
SEH  
CLH  
S 1  
S
S
V
V
T
S 0  
V 1  
V 0  
T 1  
Clear T in SREG  
T 0  
T
Set Half Carry Flag in SREG  
Clear Half Carry Flag in SREG  
H 1  
H
H
H 0  
DATA TRANSFER INSTRUCTIONS  
MOV  
MOVW  
LDI  
LD  
Rd, Rr  
Rd, Rr  
Rd, K  
Move Between Registers  
Copy Register Word  
Rd Rr  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
None  
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
-
Rd+1:Rd Rr+1:Rr  
Load Immediate  
Rd K  
Rd, X  
Load Indirect  
Rd (X)  
LD  
Rd, X+  
Rd, - X  
Rd, Y  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect  
Rd (X), X X + 1  
X X - 1, Rd (X)  
Rd (Y)  
LD  
LD  
LD  
Rd, Y+  
Rd, - Y  
Rd,Y+q  
Rd, Z  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect with Displacement  
Load Indirect  
Rd (Y), Y Y + 1  
Y Y - 1, Rd (Y)  
Rd (Y + q)  
Rd (Z)  
LD  
LDD  
LD  
LD  
Rd, Z+  
Rd, -Z  
Rd, Z+q  
Rd, k  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect with Displacement  
Load Direct from SRAM  
Store Indirect  
Rd (Z), Z Z+1  
Z Z - 1, Rd (Z)  
Rd (Z + q)  
Rd (k)  
LD  
LDD  
LDS  
ST  
X, Rr  
(X) Rr  
ST  
X+, Rr  
- X, Rr  
Y, Rr  
Store Indirect and Post-Inc.  
Store Indirect and Pre-Dec.  
Store Indirect  
(X) Rr, X X + 1  
X X - 1, (X) Rr  
(Y) Rr  
ST  
ST  
ST  
Y+, Rr  
- Y, Rr  
Y+q,Rr  
Z, Rr  
Store Indirect and Post-Inc.  
Store Indirect and Pre-Dec.  
Store Indirect with Displacement  
Store Indirect  
(Y) Rr, Y Y + 1  
Y Y - 1, (Y) Rr  
(Y + q) Rr  
ST  
STD  
ST  
(Z) Rr  
ST  
Z+, Rr  
-Z, Rr  
Z+q,Rr  
k, Rr  
Store Indirect and Post-Inc.  
Store Indirect and Pre-Dec.  
Store Indirect with Displacement  
Store Direct to SRAM  
Load Program Memory  
Load Program Memory  
Load Program Memory and Post-Inc  
Store Program Memory  
In Port  
(Z) Rr, Z Z + 1  
Z Z - 1, (Z) Rr  
(Z + q) Rr  
ST  
STD  
STS  
LPM  
LPM  
LPM  
SPM  
IN  
(k) Rr  
R0 (Z)  
Rd, Z  
Rd (Z)  
Rd, Z+  
Rd (Z), Z Z+1  
(Z) R1:R0  
Rd, P  
P, Rr  
Rr  
Rd P  
1
1
2
OUT  
PUSH  
Out Port  
P Rr  
Push Register on Stack  
STACK Rr  
14  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
POP  
Rd  
Pop Register from Stack  
Rd STACK  
None  
2
MCU CONTROL INSTRUCTIONS  
NOP  
No Operation  
Sleep  
None  
None  
None  
None  
1
1
SLEEP  
WDR  
(see specific descr. for Sleep function)  
(see specific descr. for WDR/timer)  
For On-chip Debug Only  
Watchdog Reset  
Break  
1
BREAK  
N/A  
Note:  
1. These instructions are only available in ATmega168P.  
15  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
9. Ordering Information  
9.1  
ATmega48P  
Speed (MHz)  
Power Supply (V)  
Ordering Code(2)  
Package(1)  
Operational Range  
ATmega48PV-10AU  
32A  
ATmega48PV-10AUR(4)  
ATmega48PV-10MMU  
ATmega48PV-10MMUR(4)  
ATmega48PV-10MU  
ATmega48PV-10MUR(4)  
ATmega48PV-10PU  
32A  
28M1  
28M1  
32M1-A  
32M1-A  
28P3  
10(3)  
1.8 - 5.5  
Industrial  
(-40°C to 85°C)  
ATmega48P-20AU  
32A  
32A  
ATmega48P-20AUR(4)  
ATmega48P-20MMU  
ATmega48P-20MMUR(4)  
ATmega48P-20MU  
ATmega48P-20MUR(4)  
ATmega48P-20PU  
28M1  
28M1  
32M1-A  
32M1-A  
28P3  
20(3)  
2.7 - 5.5  
Note:  
1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information  
and minimum quantities.  
2. Pb-free packaging complies to the European Directive for Restriction of Hazardous Substances (RoHS directive).Also  
Halide free and fully Green.  
3. See Figure 29-1 on page 312 and Figure 29-2 on page 312.  
4. Tape & Reel  
Package Type  
32A  
32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP)  
28M1  
28-pad, 4 x 4 x 1.0 body, Lead Pitch 0.45mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
32M1-A  
28P3  
32-pad, 5 x 5 x 1.0 body, Lead Pitch 0.50mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
28-lead, 0.300” Wide, Plastic Dual Inline Package (PDIP)  
16  
8025MS–AVR–6/11  
 
 
 
 
 
ATmega48P/88P/168P  
9.2  
ATmega88P  
Speed (MHz)  
Power Supply (V)  
Ordering Code(2)  
Package(1)  
Operational Range  
ATmega88PV-10AU  
ATmega88PV-10AUR(4)  
ATmega88PV-10MU  
ATmega88PV-10MUR(4)  
ATmega88PV-10PU  
32A  
32A  
32M1-A  
32M1-A  
28P3  
10(3)  
1.8 - 5.5  
Industrial  
(-40°C to 85°C)  
ATmega88P-20AU  
ATmega88P-20AUR(4)  
ATmega88P-20MU  
ATmega88P-20MUR(4)  
ATmega88P-20PU  
32A  
32A  
32M1-A  
32M1-A  
28P3  
20(3)  
2.7 - 5.5  
Note:  
1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information  
and minimum quantities.  
2. Pb-free packaging complies to the European Directive for Restriction of Hazardous Substances (RoHS directive).Also  
Halide free and fully Green.  
3. See Figure 29-1 on page 312 and Figure 29-2 on page 312.  
4. Taper & Reel.  
Package Type  
32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP)  
28-lead, 0.300” Wide, Plastic Dual Inline Package (PDIP)  
32A  
28P3  
32M1-A  
32-pad, 5 x 5 x 1.0 body, Lead Pitch 0.50mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
17  
8025MS–AVR–6/11  
 
 
 
ATmega48P/88P/168P  
9.3  
ATmega168P  
Speed (MHz)(3)  
Power Supply (V)  
Ordering Code(2)  
Package(1)  
Operational Range  
ATmega168PV-10AU  
ATmega168PV-10AUR(4)  
ATmega168PV-10MU  
ATmega168PV-10MUR(4)  
ATmega168PV-10PU  
32A  
32A  
32M1-A  
32M1-A  
28P3  
10  
20  
1.8 - 5.5  
Industrial  
(-40°C to 85°C)  
ATmega168P-20AU  
ATmega168P-20AUR(4)  
ATmega168P-20MU  
ATmega168P-20MUR(4)  
ATmega168P-20PU  
32A  
32A  
32M1-A  
32M1-A  
28P3  
2.7 - 5.5  
Note:  
1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information  
and minimum quantities.  
2. Pb-free packaging complies to the European Directive for Restriction of Hazardous Substances (RoHS directive).Also  
Halide free and fully Green.  
3. See Figure 29-1 on page 312 and Figure 29-2 on page 312.  
4. Taper & Reel.  
Package Type  
32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP)  
28-lead, 0.300” Wide, Plastic Dual Inline Package (PDIP)  
32A  
28P3  
32M1-A  
32-pad, 5 x 5 x 1.0 body, Lead Pitch 0.50mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
18  
8025MS–AVR–6/11  
 
 
 
ATmega48P/88P/168P  
10. Packaging Information  
10.1 32A  
PIN 1 IDENTIFIER  
PIN 1  
e
B
E1  
E
D1  
D
C
0°~7°  
A2  
A
A1  
L
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
MAX  
1.20  
0.15  
1.05  
9.25  
7.10  
9.25  
7.10  
0.45  
0.20  
0.75  
NOM  
NOTE  
SYMBOL  
A
A1  
A2  
D
0.05  
0.95  
8.75  
6.90  
8.75  
6.90  
0.30  
0.09  
0.45  
1.00  
9.00  
7.00  
9.00  
7.00  
D1  
E
Note 2  
Note 2  
Notes:  
E1  
B
1. This package conforms to JEDEC reference MS-026, Variation ABA.  
2. Dimensions D1 and E1 do not include mold protrusion. Allowable  
protrusion is 0.25 mm per side. Dimensions D1 and E1 are maximum  
plastic body size dimensions including mold mismatch.  
C
3. Lead coplanarity is 0.10 mm maximum.  
L
e
0.80 TYP  
2010-10-20  
TITLE  
DRAWING NO. REV.  
2325 Orchard Parkway  
San Jose, CA 95131  
32A, 32-lead, 7 x 7 mm Body Size, 1.0 mm Body Thickness,  
0.8 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)  
32A  
C
R
19  
8025MS–AVR–6/11  
 
ATmega48P/88P/168P  
10.2 28M1  
D
C
1
2
3
Pin 1 ID  
E
SIDE VIEW  
A1  
TOP VIEW  
A
y
K
D2  
0.45  
E2  
COMMON DIMENSIONS  
(Unit of Measure = mm)  
1
2
3
R 0.20  
MIN  
MAX  
NOM  
NOTE  
SYMBOL  
A
0.80  
0.90  
1.00  
A1  
b
0.00  
0.17  
0.02  
0.22  
0.20 REF  
4.00  
2.40  
4.00  
2.40  
0.45  
0.40  
0.05  
0.27  
b
C
D
D2  
E
3.95  
2.35  
3.95  
2.35  
4.05  
2.45  
4.05  
2.45  
L
e
E2  
e
0.4 Ref  
(4x)  
BOTTOM VIEW  
L
0.35  
0.00  
0.20  
0.45  
0.08  
y
K
The terminal #1 ID is a Laser-marked Feature.  
Note:  
10/24/08  
GPC  
DRAWING NO.  
TITLE  
REV.  
28M1, 28-pad,4 x 4 x 1.0 mm Body, Lead Pitch 0.45 mm,  
2.4 x 2.4 mm Exposed Pad, Thermally Enhanced  
Plastic Very Thin Quad Flat No Lead Package (VQFN)  
Package Drawing Contact:  
packagedrawings@atmel.com  
ZBV  
28M1  
B
20  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
10.3 32M1-A  
D
D1  
1
2
3
0
Pin 1 ID  
SIDE VIEW  
E1  
E
TOP VIEW  
A3  
A1  
A2  
A
K
COMMON DIMENSIONS  
0.08  
C
(Unit of Measure = mm)  
P
D2  
MIN  
0.80  
MAX  
1.00  
0.05  
1.00  
NOM  
0.90  
0.02  
0.65  
0.20 REF  
0.23  
5.00  
4.75  
3.10  
5.00  
4.75  
3.10  
0.50 BSC  
0.40  
NOTE  
SYMBOL  
A
A1  
A2  
A3  
b
1
2
3
P
Pin #1 Notch  
(0.20 R)  
E2  
0.18  
4.90  
4.70  
2.95  
4.90  
4.70  
2.95  
0.30  
5.10  
4.80  
3.25  
5.10  
4.80  
3.25  
D
K
D1  
D2  
E
e
b
L
E1  
E2  
e
BOTTOM VIEW  
L
0.30  
0.50  
0.60  
P
o
12  
0
Note: JEDEC Standard MO-220, Fig. 2 (Anvil Singulation), VHHD-2.  
K
0.20  
5/25/06  
DRAWING NO. REV.  
32M1-A  
TITLE  
2325 Orchard Parkway  
San Jose, CA 95131  
32M1-A, 32-pad, 5 x 5 x 1.0 mm Body, Lead Pitch 0.50 mm,  
3.10 mm Exposed Pad, Micro Lead Frame Package (MLF)  
E
R
21  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
10.4 28P3  
D
PIN  
1
E1  
A
SEATING PLANE  
A1  
L
B2  
(4 PLACES)  
B
B1  
e
E
COMMON DIMENSIONS  
(Unit of Measure = mm)  
0º ~ 15º REF  
C
MIN  
MAX  
4.5724  
NOM  
NOTE  
SYMBOL  
A
eB  
A1  
D
0.508  
34.544  
7.620  
7.112  
0.381  
1.143  
0.762  
3.175  
0.203  
34.798 Note 1  
8.255  
E
E1  
B
7.493 Note 1  
0.533  
B1  
B2  
L
1.397  
Note:  
1. Dimensions D and E1 do not include mold Flash or Protrusion.  
Mold Flash or Protrusion shall not exceed 0.25 mm (0.010").  
1.143  
3.429  
C
0.356  
eB  
e
10.160  
2.540 TYP  
09/28/01  
DRAWING NO. REV.  
28P3  
TITLE  
2325 Orchard Parkway  
San Jose, CA 95131  
28P3, 28-lead (0.300"/7.62 mm Wide) Plastic Dual  
Inline Package (PDIP)  
B
R
22  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
11. Errata  
11.1 Errata ATmega48P  
The revision letter in this section refers to the revision of the ATmega48P device.  
11.1.1  
11.1.2  
11.1.3  
Rev. C  
Rev. B  
Rev. A  
No known errata.  
No known errata.  
Not Sampled.  
11.2 Errata ATmega88P  
The revision letter in this section refers to the revision of the ATmega88P device.  
11.2.1  
11.2.2  
11.2.3  
Rev. C  
Rev. B  
Rev. A  
Not sampled.  
No known errata.  
No known errata.  
11.3 Errata ATmega168P  
The revision letter in this section refers to the revision of the ATmega168P device.  
11.3.1  
11.3.2  
Rev B  
Rev A  
No known errata.  
No known errata.  
23  
8025MS–AVR–6/11  
 
 
ATmega48P/88P/168P  
12. Datasheet Revision History  
Please note that the referring page numbers in this section are referred to this document. The  
referring revision in this section are referring to the document revision.  
12.1 Rev. 8025M-06/11  
1.  
Added Atmel QTouch Library Support and QTouch Sensing Capability Features.  
Updated “Ordering Information” to include Tape and Reel devices.  
2.  
3.  
Updated the datasheet with Atmel new style guide.  
12.2 Rev. 8025L-07/10  
1.  
2.  
Removed from the front page, the note “Not recommended for new design”.  
Editorial updates.  
12.3 Rev. 8025K-10/09  
1.  
2.  
Updated “Low Frequency Crystal Oscillator” with the Table 9-8 on page 33.  
Editorial updates.  
12.4 Rev. 8025J-05/09  
1.  
2.  
3.  
Removed the “About” section.  
Removed ATmega328P device and its reference from the data sheet.  
Editorial updates.  
12.5 Rev. 8025I-02/09  
1.  
Removed “preliminary” from ATmega48P/88P/168P.  
12.6 Rev. 8025H-02/09  
1.  
2.  
3.  
Added Power-save Maximum values and footnote to ”ATmega48P DC Characteris-  
tics” on page 310.  
Added Power-save Maximum values and footnote to ”ATmega88P DC Characteris-  
tics” on page 311.  
Added Power-save Maximum values and footnote to ”ATmega168P DC Characteris-  
tics” on page 311.  
4.  
5.  
Added Power-save Maximum values and footnote to ”” on page 312.  
Added errata for revision A, ”” on page 23.  
24  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
12.7 Rev. 8025G-01/09  
1
ATmega48P/88P not recommended for new designs.  
2.  
3.  
4.  
5.  
6.  
Updated the footnote Note1 of the Table 9-3 on page 30.  
Updated the Table 9-5 on page 31 by removing a footnote Note1.  
Updated the Table 9-11 on page 34 by removing a footnote Note1.  
Updated the footnote Note1 of the Table 9-13 on page 35.  
Updated the footnote Note2 of the ”ATmega48P DC Characteristics” on page 310  
and removed TBD from the table.  
7.  
8.  
Updated the footnote Note2 of the ”ATmega88P DC Characteristics” on page 311  
and removed TBD from the table.  
Updated the footnote Note2 of the ”ATmega168P DC Characteristics” on page 311  
and removed TBD from the table.  
9.  
Updated the footnote Note2 of the ”” on page 312 and removed TBD from the table.  
Updated the footnote Note1 of the Table 29-4 on page 314.  
Replaced the Figure 30-69 on page 358 by a correct one.  
Replaced the Figure 29-173 on page 419 by a correct one.  
Updated ”Errata” on page 23.  
10.  
11.  
12.  
13.  
14.  
15.  
Updated ”MCUCR – MCU Control Register” on page 44.  
Updated ”TCCR2B – Timer/Counter Control Register B” on page 159.  
12.8 Rev. 8025F-08/08  
1.  
2.  
Updated ”Register Summary” on page 9 with Power-save numbers.  
Added ATmega328P ”Standby Supply Current” on page 408.  
12.9 Rev. 8025E-08/08  
1.  
2.  
Updated description of ”Stack Pointer” on page 13.  
Updated description of use of external capacitors in ”Low Frequency Crystal Oscilla-  
tor” on page 33.  
3.  
4.  
5.  
6.  
Updated Table 9-10 in ”Low Frequency Crystal Oscillator” on page 33.  
Added note to ”Address Match Unit” on page 220.  
Added section ”Reading the Signature Row from Software” on page 283.  
Updated ”Program And Data Memory Lock Bits” on page 291 to include  
ATmega328P in the description.  
7.  
8.  
9.  
Added ”” on page 312.  
Updated ”Speed Grades” on page 312 for ATmega328P.  
Removed note 6 and 7 from the table ”2-wire Serial Interface Characteristics” on  
page 317.  
10.  
11.  
12.  
13.  
14.  
Added figure ”Minimum Reset Pulse width vs. VCC.” on page 346 for ATmega48P.  
Added figure ”Minimum Reset Pulse width vs. VCC.” on page 370 for ATmega88P.  
Added figure ”Minimum Reset Pulse width vs. VCC.” on page 394 for ATmega168P.  
Added ”Register Summary” on page 9.  
Updated Ordering Information for ”Packaging Information” on page 19.  
25  
8025MS–AVR–6/11  
ATmega48P/88P/168P  
12.10 Rev. 8025D-03/08  
1.  
2.  
3.  
Updated figures in ”Speed Grades” on page 312.  
Updated note in Table 29-4 in ”System and Reset Characteristics” on page 314.  
Ordering codes for ”Packaging Information” on page 19 updated.  
- ATmega328P is offered in 20 MHz option only.  
4.  
Added Errata for ATmega328P rev. B, ”” on page 23.  
12.11 Rev. 8025C-01/08  
1.  
Power-save Maximum values removed form ”ATmega48P DC Characteristics” on  
page 310, ”ATmega88P DC Characteristics” on page 311, and ”ATmega168P DC  
Characteristics” on page 311.  
12.12 Rev. 8025B-01/08  
Updated ”Features” on page 1.  
Added ”Data Retention” on page 8.  
Updated Table 9-2 on page 29.  
1.  
2.  
3.  
Removed “Low-frequency Crystal Oscillator Internal Load Capacitance“ table  
from”Low Frequency Crystal Oscillator” on page 33.  
Removed JTD bit from ”MCUCR – MCU Control Register” on page 45.  
4.  
5.  
Updated typical and general program setup for Reset and Interrupt Vector Addresses  
in ”Interrupt Vectors in ATmega168P” on page 63 and ”Interrupt Vectors in  
ATmega328P” on page 65.  
Updated Interrupt Vectors Start Address in Table 12-5 on page 64 and Table 11-7 on  
page 66.  
6.  
7.  
Updated ”Temperature Measurement” on page 259.  
8.  
9.  
Updated ATmega328P ”Fuse Bits” on page 292.  
Removed VOL3/VOH3 rows from ”DC Characteristics” on page 309.  
Updated condition for VOL in ”DC Characteristics” on page 309.  
Updated max value for VIL2 in ”DC Characteristics” on page 309.  
10.  
11.  
Added ”ATmega48P DC Characteristics” on page 310, ”ATmega88P DC Characteris-  
tics” on page 311, and ”ATmega168P DC Characteristics” on page 311.  
Updated ”System and Reset Characteristics” on page 314.  
12.  
13.  
Added ”ATmega48P Typical Characteristics” on page 322, ”ATmega88P Typical  
Characteristics” on page 346, and ”ATmega168P Typical Characteristics” on page  
370.  
14.  
15.  
Updated note in ”Instruction Set Summary” on page 13.  
12.13 Rev. 8025A-07/07  
1.  
Initial revision.  
26  
8025MS–AVR–6/11  
Atmel Corporation  
2325 Orchard Parkway  
San Jose, CA 95131  
USA  
Tel: (+1)(408) 441-0311  
Fax: (+1)(408) 487-2600  
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8025MS–AVR–6/11  

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