Philips HTB3510/12, Service Manual

Page: 69 / 75

Pin Symbol Type Description
R2
ʳ FEGIO0
3.3V LVTTL
I/O,
5V-tolerance,
2,4,6,8 mA
PDR,
75K pull-
down (0V)
LDD serial interface data. 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
R3
ʳ FEGIO1
3.3V LVTTL
I/O,
5V-tolerance,
2,4,6,8 mA
PDR,
75K pull-
down (0V)
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
T3 ʳ FEGIO10
3.3V LVTTL
I/O,
5V-tolerance,
2,4,6,8 mA
PDR,
75K pull-up
(3.3V)
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.
U1 ʳ
FEGIO11
3.3V LVTTL
I/O,
5V-tolerance,
2,4,6,8 mA
PDR,
75K pull-up
(3.3V)
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.
U2 ʳ
FEGIO3
3.3V LVTTL
I/O,
5V-tolerance,
2,4,6,8 mA
PDR,
75K pull-
down (0V)
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
R6
ʳ 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.
N5 ʳ
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.
9-22
Downloaded from www.Manualslib.com manuals search engine