MEC1322 Datasheet, PDF (158/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
Offset ^08h
Bits
Description
Type
1 SAEN
R/W
Software-assist enable.
1=This bit allows control of the GATEA20 signal via firmware
0=GATEA20 corresponds to either the last Host-initiated control of
GATEA20 or the firmware write to the Keyboard Control Register
or the EC AUX Data Register.
0 UD3
R/W
User-defined data. Readable and writable by the EC when written by
the EC at its EC-only alias.
Default
0h
Reset
Event
VCC1_R
ESET
0h
VCC1_R
ESET
11.15.5 EC AUX DATA REGISTER
Offset ^0Ch
Bits
Description
Type
7:0 EC_AUX_DATA
W
This 8-bit register is write-only. When written, the C/D in the Key-
board Status Read Register is cleared to ‘0’, signifying data, and the
IBF in the same register is set to ‘1’.
When the Runtime Register at offset 0h is read by the Host, it func-
tions as the EC_HOST Data / AUX Data Register.
Default
0h
Reset
Event
VCC1_R
ESET
11.15.6 PCOBF REGISTER
Offset ^14h
Bits
Description
7:1 Reserved
0 PCOBF
For a description of this bit, see Section 11.10.1, "PCOBF Descrip-
tion".
Type
R
R/W
Default
-
0h
Reset
Event
-
VCC1_R
ESET
DS00001719D-page 158
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