MEC1404 Datasheet, PDF (341/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

22.6.2.4 Output GPIO[140:176]
Offset ^{28Ch (Note 22-3)}
Bits
Description
31:23 RESERVED
22:16 GPIO[166:160] Output
15:8 GPIO[157:150] Output
7:0 GPIO[147:140] Output
MEC140X/1X
Type
RES
R/W
R/W
R/W
Default
-
00h
00h
00h
Reset
Event
-
nSYSR
ST
nSYSR
ST
nSYSR
ST
22.6.3 GPIO INPUT REGISTERS
The GPIO Input Registers can always be used to read the state of a pin, even when the pin is in an output mode and/or
when a signal function other than the GPIO signal function is selected; i.e., the Pin Control Register Mux Control bits
are not equal to ‘00.’
The MSbit of the Input GPIO registers have been implemented as a read/write scratch pad bit to support processor spe-
cific instructions.
Note: Bits associated with GPIOs that are not implemented are shown as Reserved.
22.6.3.1 Input GPIO[000:036]
Offset ^{300h (Note 22-3)}
Bits
31 Scratchpad Bit
30:24 GPIO[036:030] Input
23:16 GPIO[027:020] Input
15:8 GPIO[017:010] Input
7:0 GPIO[007:000] Input
Description
Type
R/W
R
R
R
R
Default
0b
00h
00h
00h
00h
Reset
Event
nSYSR
ST
nSYSR
ST
nSYSR
ST
nSYSR
ST
nSYSR
ST
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DS00001956D-page 341