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2. CONTROL PORT FUNCTIONS
2.1 System Control & I/O Port Functions
IC Ref. No Pin/Name I/O
IC301
PortA0
PortA1
PortA2
PortA3
PortA4
PortA5
PortA6
PortA7
PortB0
PortB1
PortB2
PortB3
PortB4
PortB5
PortB6
PortB7
IC1803
12
13
14
15
16
17
18
19
IC1804
12
13
14
15
16
17
18
19
Signal Name
I/O
ROMWEL
I/O
ROMWEH
I/O
BOOTWE
I/O
Not used
O
5V_SW
O
LAMP_BST_SW Lamp Ballast ON/OFF
O
IO_Reset
O
LAMP_POW
I/O
3L_EN
I/O
PortB1
I/O
Mouse1
I/O
Not used
I/O
SCL_IN
I/O
Not used
I/O
M_SCL
I/O
M_SDA
O
Mute
O
LAMP_REP_LED Lamp Replace LED Drive ON: High
O
READY_LED
O
TEMP_LED
O
POW_LED
O
KO3
O
KO2
O
KO1
O
CG_Filter
O
VHDREN
O
VFIELD_SW
O
Y/G_SW
O
PC/AV _SW
O
C/V_SW
O
PeriPow_SW
O
FanDrive_SW
4-9
Function
For ICE
For ICE
For ICE
Fixed High
Power ON/OFF
Initialize I/O
Lamp-ON
3-Line Serial ON/OFF
MatrixSDA
Mouse Control
Fixed High
Fixed High
Fixed High
IIC CLK
IIC DATA
Mute
Ready LED Drive
Temp Warning LED Drive ON: High
Power LED Drive
Main Key Switch
Main Key Switch
Main Key Switch
CG Filter ON/OFF
Philips chip Enable
VField PC/AV Selection
Sync Sep. Y/G Selection Y: High G: Low
PC/AV Selection
Video/Component
Selection
Power consumption
SW in ST
Fan Drive ON/OFF
Part 4: Troubleshooting
Note
MainPower-ON: High
Lamp Ballast-ON: High
I/O Active: Low
Lamp-ON: High
Serial Line-ON: Low
Air Mouse-ON: High
Mute-OFF: High
ON: High
ON: High
ON: High
ON: High
Video V Field: High
PC: High AV: Low
Video: Low
Component: High
Normal: High
Standby: Low
Fan Drive ON: High
OFF: Low
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