LG BH9530TW, Service Manual

Page: 121 / 147

4-8
PIN NO. SYMBOL TYPE DESCRIPTION
F13 FEGIO1
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8 mA PDR,
75K pull-down (0 V)
LDD serial interface CLK.
The pin is spike-free at power-on stage.
The pin is not allowed to pull-up in circuit layout.
Alternate function :
1. Internal monitored signal output
2. General IO
E10 FEGIO10
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8 mA PDR,
75K pull-down (3.3 V)
PC RS232 serial receive data.
The pin is spike-free at power-on stage.
Alternate function :
1. High speed serial output port. (CLOCK)
2. Internal monitored signal output
3. LED Control Output. Initial “0” Output
4. General IO
F7 FEGIO11
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8mA PDR,
75K pull-down (3.3 V)
PC RS232 serial transmit data.
The pin is spike-free at power-on stage.
Alternate function :
1. High speed serial output port. (Data)
2. Internal monitored signal output
3. General IO
E8 FEGIO3
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8mA PDR,
75K pull-down (0 V)
LED Control Output. Initial 0 Output.
The pin is spike-free at power-on stage.
Alternate function :
1. Internal monitored signal output
2. General IO
D7 FEGIO4 Analog Output
Read gain switch 4
Alternate function :
1. LCD serial interface command enable.
2. LCD_DRV: Square wave output for LCD control.
3. Internal monitored signal output
4. General IO.
E13 FEGIO5 Analog Output
Read gain switch 5
Alternate function :
1. SIDM
2. LCD serial interface command enable.
3. Internal monitored signal output
4. General IO.
D9 FEGIO6 Analog Output
Read gain switch 6.
The pin is not allowed to pull-up in circuit layout
Alternate function :
1. SIDM
2. LCD serial interface command enable.
3. Internal monitored signal output
4. General IO.
C7 FEGIO7
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8 mA PDR,
75K pull-down (0 V)
General IO.
The pin is spike-free at power-on stage.
The pin is not allowed to pull-up in circuit layout.
D6 FEGIO9
3.3V LVTTL I/O,
5V-tolerance,
2, 4, 6, 8 mA PDR,
75K pull-down (0 V)
General IO.
The pin is spike-free at power-on stage.
Alternate function :
1. Internal monitored signal output
2. Spoke input
3. Power on reset input, high active.
4. General IO.
D19 HAVC Analog Output Decoupling Pin for Reference Voltage of Main and Sub Beams
B20 INA Analog Input Input of Main Beam Signal (A)
A20 INB Analog Input Input of Main Beam Signal (B)
B19 INC Analog Input Input of Main Beam Signal (C)
A19 IND Analog Input Input of Main Beam Signal (D)