MEC1322 Datasheet, PDF (356/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
TABLE 30-8: KSO SELECT DECODE (CONTINUED)
KSO Select [4:0]
KSO Selected
0Bh
KSO11
0Ch
KSO12
0Dh
KSO13
0Eh
KSO14
0Fh
KSO15
10h
KSO16
11h
KSO17
TABLE 30-9: KEYBOARD SCAN OUT CONTROL SUMMARY
KSO_INVERTt
KSEN
KSO_ALL
KSO_SELECT
X
1
x
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
Offset ^08h
Bits
Description
31:8 Reserved
7:0 KSI
This field returns the current state of the KSI pins.
Description
Keyboard Scan disabled. KSO[17:0]
output buffers disabled.
KSO[Drive Selected] driven low. All
others driven high
KSO[Drive Selected] driven high. All
others driven low
All KSO’s driven high
All KSO’s driven low
All KSO’s driven high
All KSO’s driven low
Type
R
R
Default
-
0h
Reset
Event
-
VCC1_R
ESET
30.11.3 KSI STATUS REGISTER
Offset ^0Ch
Bits
Description
31:8 Reserved
7:0 KSI_STATUS
Each bit in this field is set on the falling edge of the corresponding
KSI input pin.
A KSI interrupt is generated when its corresponding status bit and
interrupt enable bit are both set. KSI interrupts are logically ORed
together to produce KSC_INT and KSC_INT_WAKE.
Writing a ‘1’ to a bit will clear it. Writing a ‘0’ to a bit has no effect.
Type
R
R/WC
Default
-
0h
Reset
Event
-
VCC1_R
ESET
DS00001719D-page 356
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