MEC1322 datasheet(352/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 352

 2014 - 2015 Microchip Technology Inc.

30.6

Host Interface

The registers defined for the Keyboard Scan Interface are accessible by the various hosts as indicated in Section 30.11,

"EC-Only Registers".

30.7

Power, Clocks and Reset

This section defines the Power, Clock, and Reset parameters of the block.

30.7.1

POWER DOMAINS

30.7.2

CLOCK INPUTS

30.7.3

RESETS

30.8

Interrupts

This section defines the Interrupt Sources generated from this block.

30.9

Low Power Modes

The Keyboard Scan Interface automatically enters a low power mode whenever it is not actively scanning the keyboard

matrix. The block is also placed in a low-power state when it is disabled by the KSEN bit. When the interface is in a low-

power mode it will not prevent the chip from entering a sleep state. When the interface is active it will inhibit the chip

sleep state until the interface has re-entered its low power mode.

TABLE 30-2:

POWER SOURCES

Name

Description

VCC1

The logic and registers implemented in this block are powered by this

power well.

TABLE 30-3:

CLOCK INPUTS

Name

Description

48 MHz Ring Oscillator

This is the clock source for Keyboard Scan Interface logic.

TABLE 30-4:

RESET SIGNALS

Name

Description

VCC1_RESET

This signal resets all the registers and logic in this block to their default

state.

TABLE 30-5:

EC INTERRUPTS

Source

Description

KSC_INT

Interrupt request to the Interrupt Aggregator.

KSC_INT_WAKE

Wake-up request to the Interrupt Aggregator’s wake-up interface.

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