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● SUB CPU (IC1901) Port Functions
Pin No. Function Name Function Polarity I/O
1 RXD0 RXD 0(Write for Sub CPU flash ROM) active: L I
2 TXD1 TXD 0(Write for Sub CPU flash ROM) active: L O
3 CNVSS Write for Sub CPU flash ROM - I
4 MSCL S-IIC SCL active: L I/O
5 MSDA S-IIC SDA active: L I/O
6 RESET Reset Input L: reset I
7 N.C. - - -
8 XOUT CPU Reference Clock Output 8MHz O
9 VSS Vss - I
10 XIN CPU Reference Clock Input 8MHz I
11 VCC Vcc - I
12 R/C IN Remote Control Signal Input active: L I
13 N.C. - - -
14 reserved no use O
15 RXD 1 RXD 1(Communication for Main CPU) active: L I
16 1 SEC 1Second Counter pulse O
17 TXD 1 TXD 1(Communication for Main CPU) active: L O
18 N.C. - - -
19 PIX RESET Pixel Works Reset H: PW off O
20 reserved no use O
21 reserved no use O
22 reserved no use O
23 reserved no use O
24 reserved no use O
25 TXD_SW1 RS232C SW1(Write for MCI Card) O
26 TEMP ERROR Abnormal Temperature L: Abnormal I
27 LAMP ERROR Lamp Status H: No Light I
28 TXD_SW2 RS232C SW2(Write for Main CPU Flash ROM) O
29 LAMP SW Lamp Power H: ON O
30 WARNING LED WARNING LED ON/OFF H: ON O
31 READY LED READY LED ON/OFF H: ON O
32 LAMP REP LED LAMP REPLACE LED ON/OFF H: ON O
33 FAN_SPEED UP Fun Speed Up L: ON O
34 5V_SW 5V Power Supply ON/OFF H: ON O
35 reserved no use O
36 reserved no use O
37 reserved no use O
38 reserved no use O
39 MUTE SW Audio Mute H: ON O
40 reserved no use O
41 N.C. N.C. - -
42 WRM PW Write Mode L: Write Mode I
43 TXD_SW3 RS232C SW3 O
44 FAN_DRIVE Fun Drive H: ON O
45 OPTION Destination Option I
46 KEY3 Key SW 3 I
47 KEY2 Key SW 2 I
48 KEY1 Key SW 1 I
49 AVSS GND - I
50 POWER FAIL Power Fail Detection Input L: Abnormal I
51 VREF Vcc - I
52 AVCC Vcc - I
53 N.C. - - -
54 LAMP_BST_ON Lamp Ballast ON/OFF H: ON” O
55 CLKS(BUSY) Write for Sub CPU Flash ROM active: H O
56 CLKO Write for Sub CPU Flash ROM active: L I
■ Control Port Functions
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