Service manual

Page 10
AL1702
4.5List of I/O Pin Assignments of the I307
Pin No. Port Signal Name Initial
Setting
Function
3 P5.0 KEY_POWER H ON/OFF monitor power
2 P5.1 KEY_MENU H OSD enter/exit enable
1 P5.2 KEY_PLUS H OSD right enable
42 P5.3 KEY_MINUS H OSD left enable
41 P5.4 KEY_DOWN H OSD down enable
38 P1.0 LED_G H LED green enable
37 P1.1 LED_A H LED amber enable
20 P1.2 SCL H Clock of 3-wire bus for scaler
21 P1.3 SDA H Data of 3-wire bus for scaler
22 P1.4 CSZ H Chip select of 3-wire bus for scaler
25 P1.5 HWRESET H Reset enable to scaler
29 P3.0 RXD H UART interface data IN
28 P3.1 TXD H UART interface data OUT
19 P3.2 INT H Interrupt signal from the scaler
13 P3.4 ISDA H EEPROM data bus
14 P3.5 ISCL H EEPROM clock bus
27 P6.0 DDC_WP L DDC EEPROM write protection
26 P6.1 VGA_DET H VGA cable connected
9 P6.3 PANELVCC_EN L Panel power enable
31 P6.5 BKLT_EN L Back light power enable
32 P6.6 AUDIO_EN L Audio power enable
33 P6.7 MUTE L Audio mute enable
Note : Other I/O pin assignments of the I305 MST8111B
73 PWM0 BKLT_ADJ - Backlight brightness control
74 PWM1 VOLUME - Audio volume control