UPD753012 datasheet(9/80 Pages) NEC

9 / 80 page

µPD753012, 753016, 753017

3.1 Port Pins (2/2)

Pin Name

Input/Output

Dual

Function

8-bit

At Reset

I/O Circuit

Function Pin

I/O

TYPE Note 1

P60

Input/Output

KR0

Input

F -A

P61

KR1

P62

KR2

P63

KR3

P70

Input/Output

KR4

Input

F -A

P71

KR5

P72

KR6

P73

KR7

BP0

Output

S24

Note 2

H-A

BP1

S25

BP2

S26

BP3

S27

BP4

Output

S28

BP5

S29

BP6

S30

BP7

S31

Notes 1.

Circled characters indicate the Schmitt-trigger input.

For BP0 to BP7, VLC1 is selected as an input source.

The output levels differ depending on BP0 to BP7 and the external circuit of the VLC1.

Example BP0 to BP7 are connected each other internally in the

µPD753017 as shown below. Therefore, the

output levels of BP0 to BP7 are determined by the levels of R1, R2, and R3

Programmable 4-bit input/output port

(PORT6).

This port can be specified for input/output

bit-wise.

On-chip pull-up resistors can be specified

in software in 4-bit units.

4-bit input/output port (PORT7).

On-chip pull-up resistors can be specified

in software in 4-bit units.

1-bit output port (BIT PORT)

Also used for segment output pins.

VLC1

BP1

BP0

VDD

PD753017

UPD753012 Datasheet(PDF) 9 Page - NEC

UPD753012 Datasheet(HTML) 9 Page - NEC

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