FDC37M81x SMSC Corporation, FDC37M81x Datasheet - Page 119

• Manufacturer Part Number: FDC37M81x
• Description: PC98/99 Compliant Enhanced Super I/O Controller
• Manufacturer: SMSC Corporation

The FDC37M81x is a Super I/O and Universal
Keyboard Controller that is designed for intelligent
keyboard management in desktop computer
applications. The Super I/O supports a Floppy
Disk Controller, two 16550 type serial ports one
ECP/EPP Parallel Port.
KIRQ is the Keyboard IRQ
MIRQ is the Mouse IRQ
Port 21 is used to create a GATEA20 signal from the FDC37M81x.
8042A
TST0
TST1
8042 KEYBOARD CONTROLLER DESCRIPTION
P27
P10
P26
P23
P22
P11
Keyboard and Mouse Interface
119
LS05
The Universal Keyboard Controller uses an 8042
microcontroller
concentrates on the FDC37M81x enhancements
to the 8042. For general information about the
8042, refer to the "Hardware Description of the
8042" in the 8-Bit Embedded Controller Handbook.
CPU
core.
This
KDAT
KCLK
MCLK
MDAT
section