Parker TC1475, Руководство по обслуживанию

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TC1475 / TC2175 / TF2139 12
Definition & Function of TMPA8873-XXXX Pins
Definition & Function of TMPA8873-XXXX Pins
10.
CPU part
item definition description
1 DVD high level output in DVD mode
2 NO USE
3 KEY Control signal input; general
keyboard circuit auto identified
4 GND MCU GND
5 REST MCU reset when power on
6 X-TAC
7 X-TAC
Connect ports for crystal; 20PPM precision required
8 TEST For MCU experimentation, connected to GND normal
9 5V Power input for CCD amplitude restricted circuit
10 Vss GND for CCD amplitude restricted circuit
54 GND GND for surge circuit
55 5V Power for surge circuit;
Duty cycle and Ripple voltage less than 10 mV;
56 AV SW Multi-control level output 2 or 3 TV/AV mode
57 SDA SDA input
58 SOL SCL input
59 50/60HZ Low level when 50HZ
High level when 60HZ
60 NO USE
61 MUTE MUTE control
62 NO USE
63 RMT IN
RC unit signal input
64 Power
Power control; low level for initialization; related with
item ONTIME of Page F11
Note for control port output state: (in the output table below,”0”for low level, “1” for high
level)
Pin3 Description:
Voltage range for each button (middle value is suggested)
KEY Off P+ P- V+ V- MENU TV/AV POWER
Range 0V
≤
1.16V
≤
1.74V
≤
2.45V
≤
3.17V
≤
3.88V
≤
4.60V
≤
5V
Range
5V
0
≤
0.45V
≤
1.02V
≤
1.74V
≤
2.45V
≤
3.17V
≤
3.88V
≤
4.60V