F84045 Asiliant Technologies, F84045 Datasheet - Page 49

• Manufacturer Part Number: F84045
• Manufacturer: Asiliant Technologies

Specifications of F84045

• Lead Free Status / Rohs Status: Not Compliant

Index
39
Revision 1.0
Index
39
0
1
2
3
4
5
6
7
Function
kb cont
Bits
Soft Reset & GATEA20.
controller, or B2h or 02h for external controller.
Mouse Interrupt enable on the control link
LIN pin function.
Enable Internal 8042.
Enable Mouse port
8042 RESET2 Emulation.
8042 GATEA20 Emulation.
CPU reset. Always reads as 0. Effect on write:
Disable IOW to 8042 for emulated commands.
2/10/95
This bit should be set to 1 before enabling 4045 LOUT (Index 09h bit 4). Also, the 4041 LIN pin
should have a pull-up resistor to keep it high during and immediately following reset. If 4041
Test Mode is desired (for hardware testing), the 4041 LIN pin may be externally pulsed low while
bit 1 in this register is 0.
Bits 4 and 5 are optional with either internal or external keyboard controller, but setting these bits
normally will provide a performance benefit.
0
1
0
1
0
1
0
1
0
1
1
0
1
dis 8042
IOW
D7
Description
0
1
Test Function (default).
Link input (normal operation).
Disabled. Keyboard pins are GATEA20 and KBRESET#.
Internal 8042 enabled. Keyboard pins are KBCLK and KBDATA.
Disabled.
Internal 8042 mouse port enabled. Bit 2 must also be set.
Disabled.
The Emulated 8042 KBRESET# function will cause a Soft CPU Reset.
The Emulated 8042 GATEA20 logic ignores 8042 commands.
8042 commands are enabled to the Em ulated 8042 GATEA20 logic
0
Reset the CPU if SMI mode is disabled. Otherwise, generate an SMI to request CPU
reset.
All 8042 commands go to the 8042.
GATEA20 and RESET2 commands to the 8042 have IOW# blocked to speed up the
CPU reset
operation of the 8042 commands.
D6
Subject to change without notice
kbga20
EMU
D5
Default = 04h. Typical setting = BFh for internal keyboard/mouse
Disabled (mouse interrupt not sent to 4045)
Enabled (send mouse interrupt notification to 4045)
No effect (do nothing).
EMU kbres
48
D4
IntMouse
D3
Int8042
D2
LIN pin
Configuration Registers
Preliminary
D1
Mouse lout
D0
CS4041