UPD753012 datasheet(21/80 Pages) NEC

21 / 80 page

µPD753012, 753016, 753017

6. PERIPHERAL HARDWARE FUNCTIONS

6.1 Digital Input/Output Ports

There are four types of I/O ports as follows.

· CMOS input (PORT0, 1)

· CMOS input/output (PORT2, 3, 6, 7)

: 16

· N-channel open-drain input/output (PORT4, 5)

· Bit port output (BP0-BP7)

Total

Table 6-1. Types and Features of Digital Ports

Port (Pin Name)

Function

Operation & Features

Remarks

PORT0

4-bit input

Dual function pins also function as output pins depending on

Also used for the INT4,

(P00-P03)

the operation mode when the serial interface function is used.

SCK, SO/SB0, SI/SB1 pins.

PORT1

Dedicated 4-bit I/O port

Also used for the INT0-

(P10-P13)

INT2 and TI0-TI2 pins.

PORT2

4-bit I/O

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

Also used for the PTO0-

(P20-P23)

units.

PTO2, PCL, BUZ pins.

PORT3

Can be set to input mode or output mode in 1/4 bit

Also used for the LCDCL,

(P30-P33)

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

(P40-P43)

(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

(P50-P53)

withstanding)

PORT6

4-bit I/O

Can be set to input mode

Ports 6 and 7 are paired

Also used for the KR0-KR3

(P60-P63)

or output mode in 1/4-bit

and data can be input/

pins.

units.

output in 8-bit units.

PORT7

Can be set to input mode

Also used for the KR4-KR7

(P70-P73)

or output mode in 4-bit

pins.

units.

BP0-BP7

1-bit output

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

—

segment output S24-S31 by software.

UPD753012 Datasheet(PDF) 21 Page - NEC

UPD753012 Datasheet(HTML) 21 Page - NEC

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Datasheet Download

Link URL