SM3517 데이터 시트보기 (PDF) - Sharp Electronics

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SM3517

4-Bit Single-Chip Microcomputer (For Data Bank Use)

Sharp Electronics 

SYSTEM COMFIGURATION EXAMPLE

Common signal

S7-S21

CE

Expand

memory

32 k-byte

S1-S6

S53-S60

Key matrix

(MAX. 84-key)

Segment signal

CE

RW

DIO1-DIO8

S1-S60

SM3517

KI2-KI7

KI1 XCR VCC TEST RESET XI

ON

Key

3V

+ RESET

– Key

H1-H9

VB

VM

VA

EO1

EO2

Individual output

XO BZ

VCC

VCC

Buzzer

SM3517

-2-

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