W83977F Datasheet, PDF (119/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

7.4 Commands
COMMAND
20h
60h
A4h
A5h
A6h
A7h
A8h
A9h
W83977F/ W83977AF
PRELIMINARY
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
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Publication Release Date:March 1998
Revision 0.58