Hitachi CMP5000WXJ Service Manual page 116

M30624FGAFP (RGB ASSY : IC5505)
• Main Microcomputer
•
Pin Function
No. Pin Name
1 TXD Serial 3 line data output
2 CLK Serial 3 line clock
3 FAN FAN control
4 VOL Audio VOL control
5 H_SYNC Horizontal synchronizing signal input for signal distinction
6 V_SYNC Vertical synchronizing signal input for signal distinction
7 DPMS SYNC select for power management
8 BYTE GND
9 CNVSS Power supply in flash writing, STB +5V
10 NC Non connection
11 XCONT (Not used) GND
12 RST Reset input
13 XOUT Main clock output
14 VSS GND
15 XIN Main clock input
16 VCC 5V standby power
17 Not used Pull-up
18 REM Remote control signal input
19 REQ_MD Communication request from the module microcomputer
20 KEY_SCAN Key data input
21 WP SW E2PROM write permission for Plug &Play
22 SLOT_ST2 Inside / outside product distinction of SLOT
23 FUNC1 Outside product SLOT function output 1
24 FUNC2 Outside product SLOT function output 2
25 NC
26 NC
Non connection
27 NC
28 NC
29 SCL Clock output for IICbus
30 SDA Data input/output for IICbus
31 TXD1 Data output (flash writing / external equipment communication)
32 RXD1 Data input (flash writing / external equipment communication)
33 CLK1 Clock for flash writing
34 BUSY1 Busy for flash writing
35 TXD0 Data output for communication with the module microcomputer
36 RXD0 Data input for communication with the module microcomputer
37 LED_G Green LED lighting
38 LED_R Red LED lighting
39 NC Non connection
40 IN1DET INPUT1 input detection
41 EPM EPM input for flash writing
42 AUDIO_NG Audio NG detection
43 NC
Non connection
44 NC
45 OSD_CE Enable for OSD
46 CE CE input for flash writing (pull-up)
47 WU_CE Enable for waide microcomputer
48 FAN_NG NG detection for fan
49 IN5DET Video signal input detection
50 CB_MUTE Combination mute
144
Function