MEC1322 datasheet(355/456 Pages) MICROCHIP

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DS00001719D-page 355

MEC1322

30.11.1

KSO SELECT REGISTER

TABLE 30-7: EC-ONLY REGISTER SUMMARY

Offset

Reserved

KSO Select Register

KSI INPUT Register

KSI STATUS Register

10h

KSI INTERRUPT ENABLE Register

14h

Keyscan Extended Control Register

Offset

04h

Bits

Description

Type

Default

Reset

Event

31:4 Reserved

7 KSO_INVERT

This bit controls the output level of KSO pins when selected.

0= KSO[x] driven low when selected

1= KSO[x] driven high when selected.

R/W

VCC1_R

ESET

6 KSEN

This field enables and disables keyboard scan

0= Keyboard scan enabled

1= Keyboard scan disabled. All KSO output buffers disabled.

R/W

VCC1_R

ESET

5 KSO_ALL

0=When key scan is enabled, KSO output controlled by the KSO_SE-

LECT field.

1=KSO[x] driven high when selected.

R/W

VCC1_R

ESET

4:0 KSO_SELECT

This field selects a KSO line (00000b = KSO[0] etc.) for output

according to the value off KSO_INVERT in this register. See

Table 30-8, "KSO Select Decode"

R/W

VCC1_R

ESET

TABLE 30-8:

KSO SELECT DECODE

KSO Select [4:0]

KSO Selected

00h

KSO00

01h

KSO01

02h

KSO02

03h

KSO03

04h

KSO04

05h

KSO05

06h

KSO06

07h

KSO07

08h

KSO08

09h

KSO09

0Ah

KSO10

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