UPD753104GK データシートの表示（PDF） - NEC => Renesas Technology

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UPD753104GK

4-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD753104, 753106, 753108

3.2 Non-port Pins (1/2)

Pin Name

Input/Output

Alternate

Function

Function

I/O Circuit

After Reset

TYPE Note 1

TI0

Input

P13

Inputs external event pulses to the timer/event

counter.

TI1

P12/INT2/TI2

TI2

P12/INT2/TI1

PTO0

Output

P20

Timer/event counter output

PTO1

P21

PTO2

P22/PCL

PCL

P22/PTO2 Clock output

BUZ

P23

Optional frequency output (for buzzer output or

system clock trimming)

SCK

Input/Output

P01

Serial clock input/output

SO/SB0

P02

Serial data output

Serial data bus input/output

SI/SB1

P03

Serial data input

Serial data bus input/output

INT4

Input

P00

Edge detection vectored interrupt input (both

rising edge and falling edge detection)

INT0

INT1

INT2

Input

P10

P11

P12/TI1/TI2

Edge detection vectored

interrupt input (detection

edge can be selected).

INT0/P10 can select noise

elimination circuit.

Rising edge detection

testable input

Noise elimination circuit/

asynchronous selection

Asynchronous

Asynchronous

KR0-KR3

Input

P60-P63 Falling edge detection testable input

S0-S15

Output

–

Segment signal output

S16-S19

Output

P93-P90 Segment signal output

S20-S23

Output

P83-P80 Segment signal output

COM0-COM3 Output

–

Common signal output

VLC0-VLC2

–

–

LCD drive power

On-chip split resistor is enabled (mask option).

BIAS

Output

–

Output for external split resistor disconnect

LCDCL Note 4

Output

P30

Clock output for externally expanded driver

SYNC Note 4

Output

P31

Clock output for externally expanded driver

synchronization

Input

Input

Input

Input

Input

Input

Note 2

Input

Input

Note 2

–

Note 3

Input

Input

(B)-C

E-B

(F)-A

(F)-B

(M)-C

(B)

(B)-C

(F)-A

G-A

H

H

G-B

–

–

E-B

E-B

Notes 1.

2.

3.

4.

Characters in parentheses indicate the Schmitt trigger input.

Each display output selects the following VLCX as input source.

S0-S15: VLC1, COM0-COM2: VLC2, COM3: VLC0

When a split resistor is contained ........ Low level

When no split resistor is contained ...... High-impedance

These pins are provided for future system expansion.

At present, these pins are used only as pins P30 and P31.

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