UPD753036 datasheet(21/88 Pages) NEC

21 / 88 page

µPD753036, 753036(A)

Data Sheet U11353EJ4V0DS00

6. PERIPHERAL HARDWARE FUNCTIONS

6.1 Digital I/O Port

The following four types of I/O ports are available:

•

CMOS input (PORT0 and 1)

8 pins

•

CMOS I/O (PORT2, 3, 6, 7, and 8) : 20 pins

•

N-ch open-drain I/O (PORT4 and 5) :

8 pins

•

Bit port output (BP0 through BP7)

8 pins

Total

: 44 pins

Table 6-1. Types and Features of Digital Ports

Port Name

Function

Operation & Features

Remarks

PORT0

4-bit input

When using serial interface function, the dual function

Also used as the INT4,

pin can function as the output port depending on the

SCK, SO/SB0, SI/SB1 pins.

operation mode.

PORT1

4-bit input port

Also used as the INT0-

INT2 and TI0 pins.

PORT2

4-bit I/O

Can be set to input mode or output mode in 4-bit

Also used as the PTO0-

units.

PTO2, PCL, BUZ pins.

PORT3

Can be set to input mode or output mode in 1-bit

Also used as the LCDCL,

units.

SYNC pins.

PORT4

4-bit I/O

Can be set to input mode

Ports 4 and 5 are paired

On-chip pull-up resistor can

(N-channel

or output mode in 4-bit

and data can be input/

be specified bit-wise by

open-drain,

units.

output in 8-bit units.

mask option.

PORT5

13 V with-

stand voltage)

PORT6

4-bit I/O

Can be set to input mode

Ports 6 and 7 are paired

Also used as the KR0-KR3

or output mode in 1-bit

and data can be input/

pins.

units.

output in 8-bit units.

PORT7

Can be set to input mode

Also used as the KR4-KR7

or output mode in 4-bit

pins.

units.

PORT8

Can be set to input mode or output mode in 4-bit

Also used as the TI1, TI2,

units

AN6, AN7 pins.

BP0-BP7

1-bit output

Outputs data bit-wise. Can be switched to LCD drive

—

segment output S24-S31 by software.

UPD753036 Datasheet(PDF) 21 Page - NEC

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