W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 146

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

KBC Command Sets, continued
12.5 Hardware GATEA20/Keyboard Reset Control Logic
The KBC includes hardware control logic to speed-up GATEA20 and KBRESET. This control logic is
controlled by LD5-CRF0 as follows:
12.5.1
DEFAULT
NAME
BIT
COMMAND
ADh
ABh
AEh
C0h
C1h
C2h
D0h
D1h
D2h
D3h
D4h
E0h
FXh
KB Control Register (Logic Device 5, CR-F0)
KCLKS1
7
1
KCLKS0
Interface Test
Disable Keyboard Interface
Enable Keyboard Interface
Read Input Port (P1) and send data to the system
Continuously puts the lower four bits of Port1 into the STATUS register
Continuously puts the upper four bits of Port1 into the STATUS register
Send Port 2 value to the system
Only set / reset GateA20 line based on system data bit 1
Send data back to the system as if it came from the Keyboard
Send data back to the system as if it came from Auxiliary Device
Output next received byte of data from system to Auxiliary Device
Reports the status of the test inputs
Pulse only RC (the reset line) low for 6μs if the Command byte is even
6
0
BIT
00
01
02
03
04
No Error Detected
Keyboard "Clock" line is stuck high
Keyboard "Clock" line is stuck low
Keyboard "Data" line is stuck low
Keyboard "Data" line is stuck high
5
0
BIT DEFINITION
RESERVED
-135-
4
0
FUNCTION
3
0
Publication Release Date: May 25, 2007
P92EN
2
0
W83627UHG
HGA20
1
0
Revision 1.0
HKBRST
0
0