-87-
Control Port Functions
IC7841 1OFAN_CONT4
2OFAN_CONT3
3OFAN_CONT2
M62334 4OFAN_CONT1
6ISDA0_5V
7ISCL0_5V
8-Vcc
IC Ref. No. Pin I/O Signal Name Function Note
● IIC Bus D/A Converter
1 MCLR/VPP RESET I
2 RA0/AN0 LAMP_PWM APL Level Input I
3 RA1/AN1 CPU_ADCIN From lamp iris for factory usage I
4 RA2/AN2 LAMP_ERR Lamp Error Output Lamp Error = H O
5 RA3/AN3 (5V) O
6 RA4/TOCKI O
7 RA5/AN4 I
9 OSC1 XTAL -
10 OSC2 XTAL -
11 RC0 CPU_RESET -
12 RC1 PWR_SW Power ON = H -
13 RC2 PIC_POW_M Not used I
14 RC3 SCL0_5V
15 RC4 SDA0_5V -
16 RC5 LAMP_SW Lamp ON = L O
17 RC6 TX_LAMP O
18 RC7 RX_LAMP I
21 RB0 P_KEY_PIC Power Key Input I
22 RB1 RC_IN_PIC Remote Control Input I
23 RB2 -
24 RB3 PIC_LAMP_LED O
25 RB4 PIC_READY_LED O
26 RB5 PIC_POWER_LED O
27 RB6 RB6_PIC Service I
28 RB7 RB7_PIC Service I
Pin No. Name Function Name Function Polarity I/O
● Sub CPU (IC4801, PIC16F873)
IC1801 2IK11 Key Input 1
3IK12 Key Input 2
TC74LCX541 4IK13 Key Input 3
5IPOWER_FAIL Power Fail Input Power Fail: Low
6IP-KEY_PW Power key Input
7ILAMP_ERR Lamp Error Input Lamp Error: High
8IOPTION Option Input
9IHDMI_SW
IC1821 12 O HOT_PLUG HDMI
13 O READY_LED
TC74LCX574 14 O POWER_LED
15 O TEMP_LED
16 O LAMP_LED
17 O K03 Key Scan Output
18 O K02 Key Scan Output
19 O K01 Key Scan Output
IC Ref. No Pin I/O Signal Name Function Note
● Parallel Bus I/O Expander