Sanyo LCD-27XA2, Service Manual

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Sub CPU Port Functions (IC1801)
-7-
Pin No. Function Name Function
1 SCL I
2
C Bus Clock (For Tuner, IC101, IC3451 of Signal Unit)
2 P3_7 TV_VGA (Not used)
3 Reset Reset Input (L=Reset)
4 Xout X’tal Osc. Output (10MHz)
5 Vss Vss (GND)
6 Xin X’tal Osc. Input (10MHz)
7 Vcc Vcc=3.3V
8 Mode Mode / Connected to Vcc
9 P4_5
10 P1_7 A Detection Input -Not used-
11 P1_6 DM Clock Output (Not used)
12 P1_5 DM Data (Not used)
13 P1_4 DM IR Send (Not used)
14 P1_3 RGB ON/OFF Output (Not used)
15 P1_2 Power4 Output
16 Vref Reference for ADC (Vcc)
17 P1_1 Timer Recording Output (H=Recording) (Not used)
18 P1_0 D/A Control Output (H=Digital)
19 P3_3
20 SDA I 2 C Bus Data (For Tuner, IC101, IC3451 of Signal Unit)