MEC1404 Datasheet, PDF (401/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
29.5 Signal Description
TABLE 29-1: SIGNAL DESCRIPTION TABLE
Name
PS2_DAT
PS2_CLK
Direction
INPUT/
OUTPUT
INPUT/
OUTPUT
Description
Data from the PS/2 device
Clock from the PS/2 device
29.6 Host Interface
The registers defined for the Keyboard Scan Interface are accessible by the various hosts as indicated in Section 29.15,
"EC-Only Registers".
29.7 Power, Clocks and Reset
This section defines the Power, Clock, and Reset parameters of the block.
29.7.1 POWER DOMAINS
VTR
Name
29.7.2 CLOCK INPUTS
Description
The logic and registers implemented in this block are powered by this
power well.
Name
48 MHz Ring Oscillator
2 MHz Clock
29.7.3 RESETS
Description
This is the clock source for PS/2 Interface logic.
The PS/2 state machine is clocked using the 2 MHz clock.
nSYSRST
Name
Description
This signal resets all the registers and logic in this block to their default
state.
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DS00001956D-page 401