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2.5 Parallel Bus DA & I/O Port Functions
IC REF. NO
Pin
I/O
IC2321
1
I
TC74LCX541
2
I
3
I
4
I
5
I
6
I
7
I
8
I
9
I
IC2322
1
I
TC74LCX541
2
I
3
I
4
I
5
I
6
I
8
I
9
I
IC2323
12
O
TC74LCX574
13
O
14
O
15
O
16
O
17
O
18
O
19
O
IC2324
12
O
TC74LCX574
13
O
14
O
15
O
16
O
17
O
18
O
19
O
Signal Name
Function
CS_IN
Not used
SC_SW
Scart Selection SIgnal input
S_SW
S-Video Selection Signal input
CARD_IN
Imager Card Signal input
W_LAN_IN
Wireless LAN Signal input
VIEWER_ON
Viewer Unit Signal input
CS_IN
VSYNC_DET
V-Sync Signal input
DVI_SW_N
DVI Input switch
PC/AV_SW
PC/AV switch
COMPO
Component Mode switch
PC1/PC2_SW
PC1/PC2 Mode switch
MNTOUT
PC2 Monitor Output switch
VOL_SW
PC/AV Audio switch
DDC_SW1
DDC switch
Not used
MOUSE/CPU_SW
AUDIO_MUTE
Audio Mute switch
Not used
Not used
Not used
Not used
Not used
Not used
4-9
Part 4: Troubleshooting
Note
L: Scart on
L: S-Video on
L: Imager on
L: Wireless LAN on
L: Viewer Unit on
Not used
DVI HDCP-in:High
PC: High
Component in:Low
PC1: Low
Monitor-out: Low
PC Audio in: High
Mute-on: High
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