W83977EG-AW Datasheet, PDF (72/142 Pages) Nuvotem Talema – These products are not designed for use in life support appliances

W83977EF-AW/W83977EG-AW
8.4 Commands
COMMAND
20h
60h
A4h
A5h
A6h
A7h
A8h
A9h
AAh
FUNCTION
Read Command Byte of Keyboard Controller
Write Command Byte of Keyboard Controller
BIT
BIT DEFINITION
7 Reserved
6 IBM Keyboard Translate Mode
5 Disable Auxiliary Device
4 Disable Keyboard
3 Reserve
2 System Flag
1 Enable Auxiliary Interrupt
0 Enable Keyboard Interrupt
Test Password
Returns 0Fah if Password is loaded
Returns 0F1h if Password is not loaded
Load Password
Load Password until a "0" is received from the system
Enable Password
Enable the checking of keystrokes for a match with the password
Disable Auxiliary Device Interface
Enable Auxiliary Device Interface
Interface Test
BIT
BIT DEFINITION
00 No Error Detected
01 _{Auxiliary Device "Clock" line is stuck low}
02 Auxiliary Device "Clock" line is stuck high
03 Auxiliary Device "Data" line is stuck low
04 Auxiliary Device "Data" line is stuck low
Self-test
Returns 055h if self test succeeds
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