Daewoo DTR-14D3VG, Service Manual

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PCA84C 122A(IC REMOCON)
(1) Features
• ROM, RAM and I/O is device dependent
• Two test inputs T0, T1
• 3 Single-level vectored interrupt sources
• 8 bit programmable timer/counter with 5-bit pre-scaler
• Single supply voltage from 2.0V to 5.5V
• On-board oscillator 1MHz to 5MHz
• Operating temperature range -20 to +50 C
(2) General Description
The PCA84C122A is a stand-alone micro controller designed for use in remote control unit for a wide
range of applications.
(3) Pin Description
PIN SIGNAL DESCRIPTION
3 P00
2 P01
23 P02
22 P03 Standard I/O Port lines, generally used for keypad scanning
10 P04
11 P05
14 P06
15 P07
19 P10
18 P11
17 P12
16 P13 Standard I/O Port lines, generally used for keypad scanning
1 P14
24 P15
12 P16
13 P17
4 TP/INT Test T0 and external interrupt input
5 T1 Test T1
6 RESET Active HIGH reset, normally tied to Vss because internal
Power-on reset can serve the same function
8 XTAL 1 Crystal or ceramic resonator
9 XTAL 2
21 OUT Pulse train output pin, capable of sinking 27mA
7 V
DD
Power supply
20 Vss Ground