MEC1322 Datasheet, PDF (355/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
TABLE 30-7: EC-ONLY REGISTER SUMMARY
Offset
Register Name
0h
Reserved
4h
KSO Select Register
8h
KSI INPUT Register
Ch
KSI STATUS Register
10h
KSI INTERRUPT ENABLE Register
14h
Keyscan Extended Control Register
30.11.1 KSO SELECT REGISTER
Offset ^04h
Bits
Description
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.
6 KSEN
This field enables and disables keyboard scan
0= Keyboard scan enabled
1= Keyboard scan disabled. All KSO output buffers disabled.
5 KSO_ALL
Type
R
R/W
R/W
R/W
0=When key scan is enabled, KSO output controlled by the KSO_SE-
LECT field.
1=KSO[x] driven high when selected.
4:0 KSO_SELECT
R/W
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"
Default
-
0b
Reset
Event
-
VCC1_R
ESET
1h
VCC1_R
ESET
0b
VCC1_R
ESET
0h
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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DS00001719D-page 355