1995 May 01

7

Philips Semiconductors

Product specification

8-bit microcontrollers for

remote control transmitters

PCA84C122; 222; 422; 622; 822

6.2

Pin description

Table 1

Pin description for PCA84CX22AP, PCA84CX22AT, PCA84CX22BP, PCA84CX22BT and PCA84CX22CT

7

POWER-ON-RESET STATUS AND PORT OPTIONS

• All Port lines are standard I/O (option 1).

• RESET (Power-on-reset) level of 1.3 V.

After Power-on-reset, Port 0 is reset to LOW; Port 1, Port 2 and OUT are reset to HIGH.

SYMBOL

PIN

DESCRIPTION

SDIP24/SO24

(see Fig.3)

SO28

(see Fig.4)

SO20

(see Fig.5)

DIP20

(see Fig.6)

P00 to P07

3, 2, 23, 22,

10, 11, 14, 15

4, 3, 26, 25,

11, 12, 17, 18

2, 1, 20, 19, 9,

10, 11, 12

7, 6, 5, 4, 14,

15, 16, 17

standard I/O Port lines, generally

used for keypad scanning

P10 to P17

19, 18, 17, 16,

1, 22, 12, 13

22, 21, 20,19,

2, 27, 13, 16

16, 15, 14, 13

1, 20,19, 18

standard I/O Port lines, generally

used for keypad sensing

P20 to P23

−

14, 15, 1, 28

−−

standard I/O Port lines, generally

used for visible LED’s

T0/INT

4538

test T0 and external interrupt input

T1

5649

test T1 input

RESET

67510

active HIGH reset;

For further information see

PCF84CXXXA description in

“Data Handbook IC14”.

XTAL1

9

10

8

13

crystal or ceramic resonator

XTAL2

89712

OUT

21

24

18

3

pulse train output pin, capable of

sinking 27 mA

78611

power supply

20

23

17

2

ground