UPD75P3018GC-3B9 datasheet(8/60 Pages) NEC

Part #	UPD75P3018GC-3B9

Description	4-BIT SINGLE-CHIP MICROCONTROLLER

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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µPD75P3018

8

3.2 Non-port Pins (1/2)

Pin name

I/O

Shared by

Function

Status

I/O circuit

after reset

typeNote

TI0

Input

P13

External event pulse input to timer/event counter

Input

-C

TI1, TI2

Input

P12/INT2

PTO0

I/O

P20

Timer/event counter output

Input

E-B

PTO1

P21

PTO2

P22

PCL

Output

P22

Clock output

Input

E-B

BUZ

I/O

P23

Frequency output (for buzzer or system clock trimming)

Input

E-B

SCK

I/O

P01

Serial clock I/O

Input

<F>-A

SO/SB0

I/O

P02

Serial data output

Input

<F>-B

Serial data bus I/O

SI/SB1

I/O

P03

Serial data input

Input

<M>-C

Serial data bus I/O

INT4

Input

P00

Edge detection vectored interrupt input

Input

(valid for detecting both rising and falling edges)

INT0

Input

P10

Edge detection vectored interrupt input Clock synch/asynch

Input

-C

(detected edge is selectable)

is selectable

INT1

P11

Asynch

INT2

Input

P12/TI1/TI2

Rising edge detection test input

Asynch

Input

-C

KR0-KR3

I/O

P60-P63

Parallel falling edge detection test input

Input

<F>-A

KR4-KR7

I/O

P70-P73

Parallel falling edge detection test input

Input

<F>-A

X1

Input

—

Ceramic/crystal oscillation circuit connection for main system

—

clock. If using an external clock, input to X1 and input

X2

—

inverted phase to X2.

XT1

Input

—

Crystal oscillation circuit connection for subsystem clock.

—

If using an external clock, input to XT1 and input inverted

XT2

—

phase to XT2. XT1 can be used as a 1-bit (test) input.

RESET

Input

—

System reset input

—

MD0

I/O

P30/LCDCL

Mode selection for program memory (PROM) write/verify

Input

E-B

MD1

P31/SYNC

MD2, MD3

P32, P33

D0-D3

I/O

P40-P43

Data bus for program memory (PROM) write/verify

Input

M-E

D4-D7

P50-P53

VPP

—

Programmable power supply voltage for program memory

—

(PROM) write/verify.

For normal operation, connect directly to VDD.

Apply +12.5 V for PROM write/verify.

VDD

—

Positive power supply

—

Vss

—

Ground

—

Note

Circuit types enclosed in brackets indicate Schmitt trigger input.

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UPD75P3018GC-3B9 Datasheet(PDF) 8 Page - NEC

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