MEC1404 Datasheet, PDF (460/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
37.9.8 VCI BUFFER ENABLE REGISTER
Offset ^20h
Bits
DESCRIPTION
31:9 Reserved
8 VCI_OVRD_EN
VCI_OVRD_IN Input Buffer Enable.
After changing the buffer enable, firmware should clear
any potential interrupt that may have been triggered by
the input, as changing the buffer may cause the internal
status to change.
1=VCI_OVRD_IN input buffer enabled independent of the
VCI_OVRD_INPUT_ENABLE bit
0=VCI_OVRD_IN input buffer enabled by the
VCI_OVRD_INPUT_ENABLE bit (default)
7:2 Reserved
1:0 VCI_BUFFER_EN
Input Buffer enable.
After changing the buffer enable for a VCI input, firmware
should reset the input latch and clear any potential inter-
rupt that may have been triggered by the input, as chang-
ing the buffer may cause the internal status to change.
For each bit in the field:
1=VCI_IN# input buffer enabled independent of the IE bit.
The edge detection latches for this input are always
enabled
0=VCI_IN# input buffer enabled by the IE bit. The edge
detection latches are only enabled when the IE bit is
‘1’ (default)
TYPE
R
RW
R
RW
DEFAULT
-
0
RESET
EVENT
-
VBAT_POR
-
-
0
VBAT_POR
DS00001956D-page 460
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