UPD754304GSA View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD754304GSA

4-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD754302, 754304, 754302(A), 754304(A)

3.2 Non-port Pins

Pin Name

TI0/TI1

PTO0

PTO1

PCL

SCK

SO/SB0

SI

INT4

INT0

INT1

INT2

KR0-KR3

KR4-KR7

X1

X2

RESET

IC

VDD

VSS

Input/Output

Input

Output

Input/Output

Input

Input

Input

Input

Input

Input

–

Input

–

–

–

Alternate

Function

P13

P20

P21

P22

P01

P02

P03

P00

P10

P11

P12

P60-P63

P70-P73

–

–

–

–

–

Function

Inputs external event pulses to the timer/event

counter.

Timer/event counter output

I/O Circuit

After Reset TYPE Note

Input

B -C

Input

E-B

Clock output

Serial clock input/output

Serial data output

Serial data bus input/output

Serial data input

Edge detection vectored interrupt input (both

rising edge and falling edge detection)

Edge detection vectored

interrupt input (detection

edge can be selected).

INT0/P10 can select a

noise elimination circuit.

Asynchronous with

noise elimination

circuit can be selected

Asynchronous

Edge detection testable

input

(rising edge detection)

Asynchronous

Testable input (falling edge detection)

Input

Input

Input

Input

Input

F -A

F -B

B -C

B

B -C

B -C

F -A

Crystal/ceramic connection pin for the system

–

–

clock oscillator. When inputting the external

clock, input the external clock to pin X1, and

the inverted phase of the external clock to

pin X2.

System reset input (low-level active)

–

B

Internally connected. Connect directly to VDD.

–

–

Positive power supply

–

–

Ground potential

–

–

Note Circled characters indicate the Schmitt-trigger input.

10

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