CONTROL PORT FUNCTIONS (Cont.)
I/O Expander (IC899)
Pin NameFunctionI/O Description
1SOSERIAL OUTPUT?
2SCLBUS SCLI/OIIC Bus port, SCL : Clock
3SDABUS SDAI/OIIC Bus port, SDA : Data
4D0P-FAIL 1 INPower Failure for Digital Power Source, Failure : Low
5D1P-FAIL 2INPower Failure for Panel, Failure : Low
6D2P-FAIL 3INPower Failure for Analog Power Source, Failure : Low
7D3P-FAIL 4INPower Failure for Audio Power Source, Failure : Low
8GNDGNDI
9D4AV SWITCH 1OUT Connect to IC1001 2pin
10D5AV SWITCH 2OUT Connect to IC1001 4pin
11D6AV SWITCH 3OUT Connect to IC1002 2pin
12D7AV SWITCH 4OUT Connect to IC1002 4pin
13VDDVDD?5V
14CS2CHIP SELECT3IFixed to Low
15CS1CHIP SELECT2IFixed to Low
16CS0CHIP SELECT1IFixed to Low
Mode Switching Table
ModeSWITCH 1SWITCH 2SWITCH 3SWITCH 4
TVLowHighLowHigh
AV1 (Composite)LowLowLowHigh
AV1 (S-Input: Y)HighLowLowHigh
AV2 (Composite)LowLowLowLow
AV2 (Y)LowLowHighLow
N 50 N |