UPD75336 datasheet(19/68 Pages) NEC

19 / 68 page

µPD75336

PERIPHERAL HARDWARE FUNCTIONS

5.1

PORTS

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

• CMOS input (PORT0, 1)

• CMOS input/output (PORT2, 3, 6, 7, 8)

: 20

• CMOS output (BIT PORT)

• N-ch open-drain input/output (PORT4, 5)

Total

Table 5-1 Port Functions

LED can be directly driven.

Regardless of the operating mode of the shared

pin, reading or test is always possible.

Can be set in the input or output mode as a 4-

bit unit. Port 6 and Port 7 are paired for input

and output of data as an 8-bit unit.

Can be set in the input or output mode as a 4-

bit unit. Port 4 and port 5 are paired for input

and output of data as an 8-bit unit.

Data are output bit-wise. Can be switched with

LCD driver segment outputs S24 to S31 through

software.

PORT 0

PORT 1

PORT 3 *

PORT 6

PORT 2

PORT 7

PORT 8

PORT 4 *

PORT 5 *

BP0 to BP7

Dual-function pins as SO/SB0, SI/

SB1, SCK, INT0 to INT2, INT4 and

TI0

Dual-function pins as LCDCL and

SYNC.

Dual-function pins as KR0 to KR3.

Dual-function pins as PTO0, PTO1,

PCL and BUZ in port 2.

Dual-function pins as KR4 to KR7.

Dual-function pins as TI1, AN6

and AN7

In the case of the mask option, on-

chip pull-up resistors can be speci-

fied bit-wise.

4-bit input

4-bit input/output

(N-ch open-drain 10

V withstand voltage)

1-bit output

Can be set in the input or output mode bit-wise

Port (Symbol)

Function

Operation/Features

Remarks

UPD75336 Datasheet(PDF) 19 Page - NEC

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