40
(4) Pin Description
PIN
SYMBOL
DESCRIPTION
1,2,3,4
K0,K1,K2,K3
4 bit input port with built in pull up resistor
5,6,7,8,9,10
D0,D1,D2,D3,D4,D5
10 bit output port which can be set or reset pin
by pin independently.
The output structure is N-channel open drain.
11
REMOUT
remote control signal output port which has
high current driving capability
12
OSC 2
oscillator output
13
OSC 1
oscillator input
14
Vdd
2-4V power supply
15
RESET
reset signal input which is a low active
16
GND
ground
17,18,19,20
R0,R1,R2,R3
4 bit programmable I/O port
Summary of Contents for 2898ST
Page 1: ...Service Manual 66 Cm STEREO Colour Television CHASSIS CP 775 MODEL 2898ST ...
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Page 19: ...19 3 Block Diagram ...
Page 71: ...71 CP 775 CHASSIS SCHEMATIC DIAGRAM ...
Page 72: ...72 WAVE FORMS ...