ATMEGA128RFA1-ZU [MICROCHIP]
IC RF TXRX+MCU 802.15.4 64-VFQFN;
| 型号： | ATMEGA128RFA1-ZU |
| 厂家： | 
MICROCHIP |
| 描述： | IC RF TXRX+MCU 802.15.4 64-VFQFN 时钟 ATM 异步传输模式 PC 微控制器 外围集成电路 |
| 文件： | 总13页 (文件大小：224K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
•
•
High Performance, Low Power AVR® 8-Bit Microcontroller
Advanced RISC Architecture
-
-
-
-
-
135 Powerful Instructions – Most Single Clock Cycle Execution
32x8 General Purpose Working Registers
Fully Static Operation
Up to 16 MIPS Throughput at 16 MHz and 1.8V
On-Chip 2-cycle Multiplier
•
Non-volatile Program and Data Memories
-
-
-
128K Bytes of In-System Self-Programmable Flash
Endurance: 10’000 Write/Erase Cycles @ 125°C (25’000 Cycles @ 85°C)
4K Bytes EEPROM
Endurance: 20’000 Write/Erase Cycles @ 125°C (100’000 Cycles @ 25°C)
16K Bytes Internal SRAM
8-bit
•
Microcontroller
with Low Power
2.4GHz
Transceiver for
ZigBee and
IEEE 802.15.4
•
•
•
JTAG (IEEE std. 1149.1 compliant) Interface
-
-
-
Boundary-scan Capabilities According to the JTAG Standard
Extensive On-chip Debug Support
Programming of Flash EEPROM, Fuses and Lock Bits through the JTAG interface
Peripheral Features
-
-
-
-
-
-
Multiple Timer/Counter & PWM channels
Real Time Counter with Separate Oscillator
10-bit, 330 ks/s A/D Converter; Analog Comparator; On-chip Temperature Sensor
Master/Slave SPI Serial Interface
Two Programmable Serial USART
Byte Oriented 2-wire Serial Interface
•
•
•
•
•
Advanced Interrupt Handler
Watchdog Timer with Separate On-Chip Oscillator
Power-on Reset and Low Current Brown-Out Detector
Advanced Power Save Modes
ATmega128RFA1
Fully integrated Low Power Transceiver for 2.4 GHz ISM Band
-
-
-
-
-
-
-
-
Supported Data Rates: 250 kb/s and 500 kb/s, 1 Mb/s, 2 Mb/s
-100 dBm RX Sensitivity; TX Output Power up to 3.5 dBm
Hardware Assisted MAC (Auto-Acknowledge, Auto-Retry)
32 Bit IEEE 802.15.4 Symbol Counter
Baseband Signal Processing
SFD-Detection, Spreading; De-Spreading; Framing ; CRC-16 Computation
Antenna Diversity and TX/RX control
TX/RX 128 Byte Frame Buffer
PRELIMINARY
•
•
•
Hardware Security (AES, True Random Generator)
Integrated Crystal Oscillators (32.768 kHz & 16 MHz, external crystal needed)
I/O and Package
-
-
38 Programmable I/O Lines
64-pad QFN (RoHS/Fully Green)
•
•
•
Temperature Range: -40°C to 125°C Industrial
Supply voltage range 1.8V to 3.6V with integrated voltage regulators
Ultra Low Power consumption (1.8 to 3.6V) for Rx/Tx & AVR: <18.6 mA
-
-
-
CPU Active Mode (16MHz): 4.1 mA
2.4GHz Transceiver: RX_ON 12.5 mA / TX 14.5 mA (maximum TX output power)
Deep Sleep Mode: <250nA @ 25°C
•
Speed Grade: 0 – 16 MHz @ 1.8 – 3.6V
Applications
•
•
•
ZigBee® / IEEE 802.15.4-2006/2003™ – Full And Reduced Function Device (FFD/RFD)
General Purpose 2.4GHz ISM Band Transceiver with Microcontroller
8266FS-MCU Wireless-09/14
RF4CE, SP100, WirelessHART™, ISM Applications and IPv6 / 6LoWPAN
1
1 Pin Configurations
Figure 1-1. Pinout ATmega128RFA1
64 63
56 55 54 53 52 51 50 49
62 61 60 59 58 57
[PF2:ADC2:DIG2]
[PE2:XCK0:AIN0]
[PE1:TXD0]
1
2
48
47
46
45
44
43
42
41
40
39
38
37
36
[PF3:ADC3:DIG4]
[PF4:ADC4:TCK]
[PF5:ADC5:TMS]
[PF6:ADC6:TDO]
[PF7:ADC7:TDI]
[AVSS_RFP]
[RFP]
Index corner
[PE0:RXD0:PCINT8]
[DVSS]
3
4
5
[DEVDD]
6
[PB7:OC0A:OC1C:PCINT7]
[PB6:OC1B:PCINT6]
[PB5:OC1A:PCINT5]
[PB4:OC2A:PCINT4]
[PB3:MISO:PDO:PCINT3]
[PB2:MOSI:PDI:PCINT2]
[PB1:SCK:PCINT1]
[PB0:SSN:PCINT0]
ATmega128RFA1
7
8
[RFN]
9
[AVSS_RFN]
[TST]
10
11
12
13
14
15
16
[RSTN]
[RSTON]
[PG0:DIG3]
[PG1:DIG1]
[PG2:AMR]
35 [DVSS]
Exposed paddle: [AVSS]
[DEVDD]
[CLKI]
34
33
26 27 28
17 18 19 20 21 22 23 24 25
29
30
31 32
Note:
The large center pad underneath the QFN/MLF package is made of metal and internally connected
to AVSS. It should be soldered or glued to the board to ensure good mechanical stability. If the
center pad is left unconnected, the package might loosen from the board. It is not recommended to
use the exposed paddle as a replacement of the regular AVSS pins.
2 Disclaimer
Typical values contained in this datasheet are based on simulation and characterization
results of other AVR microcontrollers and radio transceivers manufactured in a similar
process technology. Minimum and Maximum values will be available after the device is
characterized.
2
ATmega128RFA1
8266FS-MCU Wireless-09/14
ATmega128RFA1
3 Overview
The ATmega128RFA1 is a low-power CMOS 8-bit microcontroller based on the AVR
enhanced RISC architecture combined with a high data rate transceiver for the 2.4 GHz
ISM band.
By executing powerful instructions in a single clock cycle, the device achieves
throughputs approaching 1 MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
The radio transceiver provides high data rates from 250 kb/s up to 2 Mb/s, frame
handling, outstanding receiver sensitivity and high transmit output power enabling a
very robust wireless communication.
3.1 Block Diagram
Figure 3-1 Block Diagram
The AVR core combines a rich instruction set with 32 general purpose working
registers. All 32 registers are directly connected to the Arithmetic Logic Unit (ALU). Two
independent registers can be accessed with one single instruction executed in one
clock cycle. The resulting architecture is very code efficient while achieving throughputs
up to ten times faster than conventional CISC microcontrollers. The system includes
internal voltage regulation and an advanced power management. Distinguished by the
small leakage current it allows an extended operation time from battery.
The radio transceiver is a fully integrated ZigBee solution using a minimum number of
external components. It combines excellent RF performance with low cost, small size
and low current consumption. The radio transceiver includes a crystal stabilized
fractional-N synthesizer, transmitter and receiver, and full Direct Sequence Spread
3
8266FS-MCU Wireless-09/14
Spectrum Signal (DSSS) processing with spreading and despreading. The device is
fully compatible with IEEE802.15.4-2011/2006/2003 and ZigBee standards.
The ATmega128RFA1 provides the following features: 128K Bytes of In-System
Programmable (ISP) Flash with read-while-write capabilities, 4K Bytes EEPROM, 16K
Bytes SRAM, up to 35 general purpose I/O lines, 32 general purpose working registers,
Real Time Counter (RTC), 6 flexible Timer/Counters with compare modes and PWM, a
32 bit Timer/Counter, 2 USART, a byte oriented 2-wire Serial Interface, a 8 channel, 10
bit analog to digital converter (ADC) with an optional differential input stage with
programmable gain, programmable Watchdog Timer with Internal Oscillator, a SPI
serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for accessing the
On-chip Debug system and programming and 6 software selectable power saving
modes.
The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, 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 during ADC conversions. In
Standby mode, the RC oscillator is running while the rest of the device is sleeping. This
allows very fast start-up combined with low power consumption. In Extended Standby
mode, both the main RC oscillator and the asynchronous timer continue to run.
Typical supply current of the microcontroller with CPU clock set to 16MHz and the radio
transceiver for the most important states is shown in the Figure 3-2 below.
Figure 3-2 Radio transceiver and microcontroller (16MHz) supply current
20
18,6mA
1.8V
3.0V
3.6V
16,6mA
.
15
10
5
.
4,7mA
4,1mA
SLEEP
250nA
0
Deep Sleep
TRX_OFF
RX_ON
BUSY_TX
Radio transceiver and microcontroller (16MHz) supply current
The transmit output power is set to maximum. If the radio transceiver is in SLEEP mode
the current is dissipated by the AVR microcontroller only.
In Deep Sleep mode all major digital blocks with no data retention requirements are
disconnected from main supply providing a very small leakage current. Watchdog timer,
MAC symbol counter and 32.768kHz oscillator can be configured to continue to run.
4
ATmega128RFA1
8266FS-MCU Wireless-09/14
ATmega128RFA1
The device is manufactured using Atmel’s high-density nonvolatile memory technology.
The On-chip ISP Flash allows the program memory to be reprogrammed in-system
trough an SPI serial interface, by a conventional nonvolatile memory programmer, or by
on on-chip boot program 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
ATmega128RFA1 is a powerful microcontroller that provides a highly flexible and cost
effective solution to many embedded control applications.
The ATmega128RFA1 AVR is supported with a full suite of program and system
compiler, macro assemblers, program
development tools including: C
debugger/simulators, in-circuit emulators, and evaluation kits.
3.2 Pin Descriptions
3.2.1 EVDD
External analog supply voltage.
External digital supply voltage.
3.2.2 DEVDD
3.2.3 AVDD
Regulated analog supply voltage (internally generated).
Regulated digital supply voltage (internally generated).
Digital ground.
3.2.4 DVDD
3.2.5 DVSS
3.2.6 AVSS
Analog ground.
3.2.7 Port B (PB7...PB0)
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.
Port B also provides functions of various special features of the ATmega128RFA1.
3.2.8 Port D (PD7...PD0)
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.
Port D also provides functions of various special features of the ATmega128RFA1.
3.2.9 Port E (PE7...PE0)
Port E is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port E output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port E pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port E pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
5
8266FS-MCU Wireless-09/14
Port E also provides functions of various special features of the ATmega128RFA1.
3.2.10 Port F (PF7...PF0)
Port F is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port F output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port F pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port F pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
Port F also provides functions of various special features of the ATmega128RFA1.
3.2.11 Port G (PG5…PG0)
Port G is a 6-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port G output buffers have symmetrical drive characteristics with both high
sink and source capability. However the driver strength of PG3 and PG4 is reduced
compared to the other port pins. The output voltage drop (VOH, VOL) is higher while the
leakage current is smaller. As inputs, Port G pins that are externally pulled low will
source current if the pull-up resistors are activated. The Port G pins are tri-stated when
a reset condition becomes active, even if the clock is not running.
Port G also provides functions of various special features of the ATmega128RFA1.
AVSS_RFP is a dedicated ground pin for the bi-directional, differential RF I/O port.
AVSS_RFN is a dedicated ground pin for the bi-directional, differential RF I/O port.
RFP is the positive terminal for the bi-directional, differential RF I/O port.
RFN is the negative terminal for the bi-directional, differential RF I/O port.
3.2.12 AVSS_RFP
3.2.13 AVSS_RFN
3.2.14 RFP
3.2.15 RFN
3.2.16 RSTN
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. Shorter pulses are not guaranteed to
generate a reset.
3.2.17 RSTON
3.2.18 XTAL1
Reset output. A low level on this pin indicates a reset initiated by the internal reset
sources or the pin RSTN.
Input to the inverting 16MHz crystal oscillator amplifier. In general a crystal between
XTAL1 and XTAL2 provides the 16MHz reference clock of the radio transceiver.
3.2.19 XTAL2
3.2.20 AREF
3.2.21 TST
Output of the inverting 16MHz crystal oscillator amplifier.
Reference voltage output of the A/D Converter. In general this pin is left open.
Programming and test mode enable pin. If pin TST is not used pull it to low.
3.2.22 CLKI
Input to the clock system. If selected, it provides the operating clock of the
microcontroller.
6
ATmega128RFA1
8266FS-MCU Wireless-09/14
ATmega128RFA1
3.3 Unused Pins
Floating pins can cause power dissipation in the digital input stage. They should be
connected to an appropriate source. In normal operation modes the internal pull-up
resistors can be enabled (in Reset all GPIO are configured as input and the pull-up
resistors are still not enabled).
Bi-directional I/O pins shall not be connected to ground or power supply directly.
The digital input pins TST and CLKI must be connected. If unused pin TST can be
connected to AVSS while CLKI should be connected to DVSS.
Output pins are driven by the device and do not float. Power supply pins respective
ground supply pins are connected together internally.
XTAL1 and XTAL2 shall never be forced to supply voltage at the same time.
3.4 Compatibility to ATmega1281/2561
The basic AVR feature set of the ATmega128RFA1 is derived from the
ATmega1281/2561. Address locations and names of the implemented modules and
registers are unchanged as long as it fits the target application of a very small and
power efficient radio system. In addition, several new features were added.
Backward compatibility of the ATmega128RFA1 to the ATmega1281/2561 is provided
in most cases. However some incompatibilities between the microcontrollers exist.
3.4.1 Port A and Port C
Port A and Port C are not implemented. The associated registers are available but will
not provide any port control. Remaining ports are kept at their original address location
to not require changes of existing software packages.
3.4.2 External Memory Interface
The alternate pin function “External Memory interface” using Port A and Port C is not
implemented due to the missing ports.
The large internal data memory (SRAM) does not require an external memory and the
associated parallel interface. It keeps the system radiation (EMC) at a very small level
to provide very high sensitivity at the antenna input.
3.4.3 High Voltage Programming Mode
Alternate pin function BS2 (high voltage programming) of pin PA0 is mapped to a
different pin. Entering the parallel programming mode is controlled by the TST pin.
3.4.4 AVR Oscillators and External Clock
The AVR microcontroller can utilize the high performance crystal oscillator of the
2.4GHz transceiver connected to the pins XTAL1 and XTAL2. An external clock can be
applied to the microcontroller using the clock input CLKI.
3.4.5 Analog Frontend
The ATmega128RFA1 has a new A/D converter. Software compatibility is basically
assured. Nevertheless to benefit from the higher conversion speeds and the better
performance some changes are required.
7
8266FS-MCU Wireless-09/14
4 Application Circuits
4.1 Basic Application Schematic
A basic application schematic of the ATmega128RFA1 with a single-ended RF
connector is shown in Figure 4-1 below and the associated Bill of Material in Table 4-1
on page 9. The 50Ω single-ended RF input is transformed to the 100Ω differential RF
port impedance using Balun B1. The capacitors C1 and C2 provide AC coupling of the
RF input to the RF port, capacitor C4 improves matching.
Figure 4-1. Basic Application schematic (64-pin package)
CX1
CX2
XTAL
CB2
VDD
CB1
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
2
3
4
5
6
7
8
9
48
47
PE0 46
45
DVSS
DEVDD 44
PF7
PB7 43
AVSS
RFP
RFN
42
C1
C2
RF
41
40
B1
C4
10 AVSS
11 TST
39
38
RSTN
37
12
Pins TST & CLKI
must be connected
13 RSTON
14 PG0
15
PB0 36
DVSS 35
DEVDD
34
33
CLKI
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VDD
CB4
CB3
XTAL
32kHz
CX3
CX4
The power supply bypass capacitors (CB2, CB4) are connected to the external analog
supply pin (EVDD, pin 59) and external digital supply pin (DEVDD, pin 23). Pins 34, 44
and 54 supply the digital port pins.
Floating pins can cause excessive power dissipation (e.g. during power on). They
should be connected to an appropriate source. GPIO shall not be connected to ground
or power supply directly.
The digital input pins TST and CLKI must be connected. If pin TST will never be used it
can be connected to AVSS while an unused pin CLKI could be connected to DVSS (see
chapter "Unused Pins" on page 7).
Capacitors CB1 and CB3 are bypass capacitors for the integrated analog and digital
voltage regulators to ensure stable operation and to improve noise immunity.
8
ATmega128RFA1
8266FS-MCU Wireless-09/14
ATmega128RFA1
Capacitors should be placed as close as possible to the pins and should have a low-
resistance and low-inductance connection to ground to achieve the best performance.
The crystal (XTAL), the two load capacitors (CX1, CX2), and the internal circuitry
connected to pins XTAL1 and XTAL2 form the 16MHz crystal oscillator for the 2.4GHz
transceiver. To achieve the best accuracy and stability of the reference frequency, large
parasitic capacitances must be avoided. Crystal lines should be routed as short as
possible and not in proximity of digital I/O signals. This is especially required for the
High Data Rate Modes.
The 32.768 kHz crystal connected to the internal low power (sub 1µA) crystal oscillator
provides a stable time reference for all low power modes including 32 Bit IEEE 802.15.4
Symbol Counter ("MAC Symbol Counter") and real time clock application using the
asynchronous timer T/C2 ("Timer/Counter2 with PWM and Asynchronous Operation").
Total shunt capacitance including CX3, CX4 should not exceed 15pF across both pins.
The very low supply current of the oscillator requires careful layout of the PCB and any
leakage path must be avoided.
Crosstalk and radiation from switching digital signals to the crystal pins or the RF pins
can degrade the system performance. The programming of minimum drive strength
settings for the digital output signal is recommended (see "DPDS0 - Port Driver
Strength Register 0").
Table 4-1. Bill of Materials (BoM)
Designator Description
Value
Manufacturer
Part Number
Comment
B1
SMD balun
2.4 GHz
Wuerth
748421245
SMD balun / filter
Johanson
Technology
2450FB15L0001
Filter included
CB1
CB3
LDO VREG
1 µF
AVX
0603YD105KAT2A
X5R
10%
16V
50V
bypass capacitor
(100nF minimum) Murata
GRM188R61C105KA12D (0603)
CB2
CB4
Power supply bypass
capacitor
1 µF
(100nF minimum)
CX1, CX2
CX3, CX4
C1, C2
16MHz crystal load
capacitor
12 pF
12 … 25 pF
22 pF
AVX
06035A120JA
COG
5%
Murata
GRP1886C1H120JA01
(0603)
32.768kHz crystal load
capacitor
RF coupling capacitor
Epcos
Epcos
AVX
B37930
C0G
5%
50V
B37920
(0402 or 0603)
06035A220JAT2A
C4 (optional) RF matching
XTAL Crystal
0.47 pF
Johnstech
CX-4025 16 MHz ACAL Taitjen
SX-4025 16 MHz Siward
XWBBPL-F-1
A207-011
XTAL 32kHz Crystal
Rs=100 kOhm
4.2 Extended Feature Set Application Schematic
The ATmega128RFA1 supports additional features like:
• Security Module (AES)
• High Data Rate Mode up to 2MBits/s
• Antenna Diversity using alternate pin function DIG1/2 at Port G and F
9
8266FS-MCU Wireless-09/14
• RX/TX Indicator using alternate pin function DIG3/4 at Port G and F
An extended feature set application schematic illustrating the use of the
ATmega128RFA1 Extended Feature Set, is shown in Figure 4-2 below.
Figure 4-2. Extended Feature Application schematic
CX1
CX2
XTAL
CB2
VDD
CB1
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
2
3
4
5
6
7
8
9
48
47
PE0 46
45
DVSS
DEVDD 44
ANT0
PB7
PF7
43
42
41
40
39
38
37
N2
LNA
AVSS
RFP
RFN
SW2
PA
N1
10 AVSS
11 TST
SW1
B1
RSTN
12
ANT1
13 RSTON
14 PG0
15
PB0 36
DVSS 35
DEVDD
34
33
CLKI
16
Pins TST & CLKI
must be connected
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VDD
CB4
CB3
XTAL
32kHz
CX3
CX4
Although this example shows all additional hardware features combined, it is possible to
use all features separately or in various combinations.
10
ATmega128RFA1
8266FS-MCU Wireless-09/14
ATmega128RFA1
5 Revision history
Please note that the referring page numbers in this section are referring to this
document. The referring revision in this section are referring to the document revision
Rev. 8266FS-MCU Wireless-09/14
1. No changes, recreated to match datasheet revision
1. No changes, recreated to match datasheet revision
Rev. 8266ES-MCU Wireless-04/13
Rev. 8266DS-MCU Wireless-06/12
2. Order of revision history changed
3. Endurance changed (page 1)
Rev. 8266CS-MCU Wireless-08/11
1. Typos corrected (units style)
2. Associated pin of internal net ASVSS corrected
Rev. 8266BS-MCU Wireless-03/11
1. Pin Information added (TST, CLKI)
2. Application Schematics modified
3. Temperature and endurance modified
Rev. 8266AS-MCU Wireless-12/09
1. Initial release
11
8266FS-MCU Wireless-09/14
Table of Contents
8-bit
..........................................................................................1
Microcontroller.......................................................................................1
with Low Power 2.4GHz.........................................................................1
Transceiver for ZigBee and...................................................................1
IEEE 802.15.4..........................................................................................1
ATmega128RFA1 ...................................................................................1
PRELIMINARY ........................................................................................1
Features..................................................................................................1
Applications ...........................................................................................1
1 Pin Configurations..............................................................................2
2 Disclaimer............................................................................................2
3 Overview..............................................................................................3
3.1 Block Diagram ........................................................................................................ 3
3.2 Pin Descriptions...................................................................................................... 5
3.3 Unused Pins ........................................................................................................... 7
3.4 Compatibility to ATmega1281/2561 ....................................................................... 7
4 Application Circuits............................................................................8
4.1 Basic Application Schematic .................................................................................. 8
4.2 Extended Feature Set Application Schematic........................................................ 9
5 Revision history................................................................................11
Table of Contents.................................................................................12
12
ATmega128RFA1
8266FS-MCU Wireless-09/14
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