LPC47M140-NC SMSC [SMSC Corporation], LPC47M140-NC Datasheet - Page 102

• Manufacturer Part Number: LPC47M140-NC
• Description: 128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
• Manufacturer: SMSC [SMSC Corporation]

6.13 8042 KEYBOARD CONTROLLER DESCRIPTION
The LPC47M14x is a Super I/O and Universal Keyboard Controller that is designed for intelligent keyboard management
in desktop computer applications. The Universal Keyboard Controller uses an 8042 microcontroller CPU core. This
section concentrates on the LPC47M14x 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.
KIRQ is the Keyboard IRQ
MIRQ is the Mouse IRQ
Port 21 is used to create a GATEA20 signal from the LPC47M14x.
SMSC DS – LPC47M14X
8042A
TST0
TST1
P27
P10
P26
P23
P22
P11
Keyboard and Mouse Interface
Page 102
LS05
KDAT
KCLK
MCLK
MDAT
Rev. 03/19/2001