MEC1404 Datasheet, PDF (415/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

TABLE 30-4: KSO SELECT DECODE (CONTINUED)
KSO Select [4:0]
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
KSO Selected
KSO11
KSO12
KSO13
KSO14
KSO15
KSO16
KSO17
MEC140X/1X
TABLE 30-5: KEYBOARD SCAN OUT CONTROL SUMMARY
KSO_INVERTt
x
KSEN
1
KSO_ALL
x
KSO_SELECT
x
0
0
0
10001b-00000b
1
0
0
10001b-00000b
0
0
0
1
0
0
0
0
1
1
0
1
30.11.2 KSI INPUT REGISTER
11111b-10010b
11111b-10010b
x
x
Description
Keyboard Scan disabled. KSO[17:0]
output buffers disabled.
KSO[Selected] driven low. All others
driven high
KSO[Selected] driven high. All oth-
ers driven low
All KSO’s driven high
All KSO’s driven low
All KSO’s driven low
All KSO’s driven high
Offset ^08h
Bits
Description
31:8 Reserved
7:0 KSI
This field returns the current state of the KSI pins.
Type
R
R
Default
-
0h
Reset
Event
-
nSYSR
ST
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DS00001956D-page 415