UPD75304BGC View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD75304BGC

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75304B,75306B,75308B

3.1 PORT PINS (2/2)

Pin Name

P60

P61

P62

P63

P70

P71

P72

P73

BP0

BP1

BP2

BP3

BP4

BP5

BP6

BP7

Input/Output

Input/output

Input/output

Output

Output

Dual-

Function Pin

Function

8-bit I/O

KR0

Programmable 4-bit input/output port (PORT 6)

KR1

Input/output can be specified bit-wise.

On-chip pull-up resistor can be specified as a

KR2

4-bit unit by software.

KR3

KR4

KR5

4-bit input/output port (PORT 7)

On-chip pull-up resistor can be specified as a

KR6

4-bit unit by software.

KR7

S24

S25

S26

S27

1-bit output port (BIT PORT)

Also used as segment output pin.

×

S28

S29

S30

S31

After

Reset

Input

Input

*2

I/O Circuit

Type *1

F -A

F -A

G-C

* 1. : Schmitt trigger input

2. BP0 to BP7 select VLC1 as the input source.

However, the output level depends on BP0 to BP7 and VLC1 external circuit.

Example BP0 to BP7 are connected mutually within the µPD75308B. Therefore, the output level of BP0 to BP7

is determined by the value of R1, R2 and R3.

µPD75308B

VDD

ON

VLC1

R1

ON

R2

BP0

BP1

R3

10

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