UPD17P236M2GT datasheet(10/32 Pages) NEC

10 / 32 page

µPD17P236

Data Sheet U14776EJ1V0DS00

2.1 Normal Operation Mode (2/2)

Pin No.

Symbol

Function

Output Format

At Reset

23 (24)

P0C0

These pins constitute a 4-bit I/O port that can be set in the input or

N-ch

Low-level

24 (25)

P0C1

output mode in 4-bit units (group I/O).

open-drain

output

25 (26)

P0C2

In the input mode, these pins are CMOS input pins with a pull-up

26 (27)

P0C3

resistor, and can be used as the key return input lines of a key

matrix. The standby status is released when at least one of these

pins goes low.

In the output mode, they serve as N-ch open-drain output pins and

can be used as the output lines of a key matrix.

(15)

IC1

These pins cannot be used.

–

(30)

IC2

Leave open.

Remark

The number in parenthesis in the Pin No. column indicates the pin numbers of the 30-pin plastic SSOP.

2.2 PROM Programming Mode

Pin No.

Symbol

Function

Output Format

At Reset

3VPP

Power supply for PROM programming.

–

Apply +12.5 V to this pin as the program voltage when writing/

verifying program memory.

9VDD

Power supply. Apply +6 V to this pin when writing/verifying

–

program memory.

CLK

Inputs clock for PROM programming.

–

GND

Ground.

–

19 (20)

MD0

Input pins used to select operation mode when PROM is

–

Input



programmed.

22 (23)

MD3

23 (24)

Input/output 8-bit data for PROM programming

CMOS

Input



push-pull

26 (27)

27 (28)

28 (29)

1D2

2D3

Remarks 1. The other pins are not used in the PROM programming mode. How to handle the other opins are

described in PIN CONFIGURATION (2) PROM programming mode.

2. The number in parenthesis in the Pin No. column indicates the pin numbers of the 30-pin plastic

SSOP.

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