SM3512 [SHARP]
4-Bit Single-Chip Microcomputer(For Data Bank Use); 4位单片机（用于数据银行使用）
| 型号： | SM3512 |
| 厂家： | 
SHARP ELECTRIONIC COMPONENTS |
| 描述： | 4-Bit Single-Chip Microcomputer(For Data Bank Use) |
| 文件： | 总3页 (文件大小：42K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SM3512
4-Bit Single-Chip Microcomputer
(For Data Bank Use)
SM3512
DESCRIPTION
The SM3512 is a CMOS 4-bit single-chip micro-
computer for databank incorporating data memory
RAM, LCD driver, key/switch input circuit, 8-bit par-
allel I/O port, 2 output ports, external memory con-
trol circuit, and buzzer output circuit.
FEATURES
• ROM capacity :
Program ROM
8 k x 23 bits
Character ROM 5 x 9 x 128 bits
Constant ROM 208 x 4 bits
• RAM capacity :
Working RAM
256 x 4 bits
60 x 9 bits
8 k x 8 bits
Display RAM
Data RAM
• Memory expansion (external) : 8 k x 8 bits
• LCD display : 60-segment x 9-common
• I/O ports :
Parallel I/O
Input
8 bits
1 bit
Output
2 bits
Buzzer output
Key input
1 bit (4 kHz)
6 bits
• Standby release : 2 events (2 Hz signal, key input)
• Built-in oscillator :
System clock (built-in CR oscillator) 250 kHz
Timer (built-in CR oscillator)
(external crystal)
32.8 kHz
32.768 kHz
• Instruction cycle time : 12 µs
• Operating temperature : –10 to +60°C
• Supply voltage : 2.5 to 3.4 V
• Package : 100-pin QFP (QFP100-P-1420)
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books,
etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
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SM3512
SYSTEM COMFIGURATION EXAMPLE
Common signal
Segment signal
S1-S60
CE
CE
H1-H9
VB
VM
VA
S7-S19
Expand
memory
8 k-byte
RW
DIO1-DIO8
SM3512
EO1
EO2
Individual output
KI2-KI7
VCC
KI1 XCR VCC TEST RESET
XI
XO BZ
VCC
Key matrix
(MAX. 84-key)
RESET
ON
+
Key
S1-S6
Key
–
3V
S53-S60
Buzzer
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SM3512
100 QFP (QFP100-P-1420)
± 0.05
0.15
51
80
81
50
100
31
1
30
± 0.2
± 0.2
1.3
± 0.2
± 0.4
(2.4)
20.0
24.8
(2.4)
2.75
± 0.1
0.1
(22.98)
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