UPD75512 datasheet(19/64 Pages) NEC

19 / 64 page

µPD75512(A)

PERIPHERAL HARDWARE FUNCTIONS

5.1

PORT

I/O ports are classified into following kinds:

•

CMOS input (PORTS 0, 1, 8, 15)

: 16

•

CMOS input/output (PORTS 2, 3, 6, 7, 9, 10, 11)

: 28

•

N-ch open-drain input/output (PORTS 4, 5, 12, 13, 14)

: 20

Total

: 64

Table 5-1 Port Functions

Port

Function

Operation/Feature

Remarks

(Pin Name)

Also serves as the INT4, SCK0 ,

Can be read or tested regardless of the operation

SO0/SB0, and SI0/SB1 pins

4-bit input

mode of the shared pin.

Also serves as INT0 to 2, and

TIO pins

Can be specified for I/O in 4-bit units

Also serves as PTO0, PCL and

4-bit I/O

BUZ pins.

Can be specified for I/O in 1/4-bit units.

—

4-bit I/O

Whether or not the internal

(N-ch

Can be specifiedfor

pull-up resistor is provided

open-drain,

I/O in 4-bit units

can be specified for each bit

can sustain

by mask option

with 10V)

Can be specified

for I/O in 1/4-bit units

Ports 6 and 7 can

Also serves as KR0-3.

4-bit I/O

be paired to I/O

Can be specified

data in 8-bit units

I/O in 4-bit

Also serves as KR4-7.

units

4-bit

Can be read or tested regardless of the operation

Also serves as PPO, SCK1,

input

mode of the shared pin.

SO1, and SI1 pins.

Whether or not the internal

pull-up resistor is provided

can be specified for each bit

by mask option.

PORT10

4-bit I/O

Can be specified for I/O in 4-bit units.

—

PORT11

PORT12

4-bit I/O

Whether or not the internal

(N-ch

pull-up resistor is provided

PORT13

open-drain,

Can be specified for I/O in 4-bit units.

can be specified for each

can sustain

bit by mask option.

PORT14

with 10V)

PORT15

4-bit

Can be read or tested regardless of the operation

Also serves as AN4-7 pins.

Input

mode of the shared pins

PORT9

4-bit I/O

Can be specified for I/O in 4-bit units.

PORT8

PORT0

PORT1

PORT2

PORT4

PORT3

PORT5

PORT7

PORT6

Ports 4 and 5 can

be paired to I/O

data in 8-bit units

UPD75512 Datasheet(PDF) 19 Page - NEC

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