MEC1322 Datasheet, PDF (145/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
11.0 8042 EMULATED KEYBOARD CONTROLLER
11.1 Introduction
The MEC1322 keyboard controller uses the EC to produce a superset of the features provided by the industry-standard
8042 keyboard controller. The 8042 Emulated Keyboard Controller is a Host/EC Message Interface with hardware
assists to emulate 8042 behavior and provide Legacy GATEA20 support.
Note: There is no VCC emulation in hardware for this interface.
11.2 References
There are no references for this block.
11.3 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 11-1:
I/O DIAGRAM OF BLOCK
8042 Emulated Keyboard Controller
Host Interface
Clock Inputs
Resets
Interrupts
Signal Description
11.4 Signal Description
TABLE 11-1: SIGNAL DESCRIPTION TABLE
Name
Direction
Description
KBRST
Output
Keyboard Reset, routed to pin
 2014 - 2015 Microchip Technology Inc.
DS00001719D-page 145