MEC1404 Datasheet, PDF (64/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
2.11 Pin States After VTR Power-On
The following tables uses ‘Z’ to indicate a tristate signal.
2.11.1 DEFAULT OPERATION AFTER A VBAT AND VTR POR
GPIOXXX
nRESET_IN
ICSP_MCLR
BGPO
unpow-
ered
unpow-
ered
unpow-
ered
low
unpow-
ered
unpow-
ered
unpow-
ered
Out=0
low
low
low
Retain
In
In
In
Retain
In
In
In
Retain
In
In
In
Retain
Z
Z
Z
Retain
glitch
glitch
glitch
Retain
SYS-
In
In
In
In
In
In
In
In
PWR_PRES
VCI_INx#
In
In
In
In
In
In
In
In
VCI_OUT
Out
logic
Out
logic
Out Out logic Out logic Out logic Out logic Out logic
logic
VCI_OVRD_ In
In
In
In
In
In
In
In
IN
Note:
- Note A: Pin is programmable by the EC and retains its value through a VTR power cycle.
- Note B: Pin is programmable by the EC and affected by other VBAT inputs pins.
unpow-
ered
unpow-
ered
unpow-
ered
unpow-
ered
unpow-
ered
unpow-
ered
unpow-
ered
unpow-
ered
Note
A
Note
B
2.11.2 DEFAULT OPERATION AFTER A VTR POR ONLY (VBAT REMAINS ON)
The following table lists the VTR POR default conditions for VBAT powered pins where the EC had selected an alternate
function that was not the default function.
GPIO003 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
GPIO004 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
GPIO036 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
GPIO162 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
GPIO163 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
GPIO164 N/A
N/A
low
In
In
In
Z
In
unpowered Note C
Note:
- Note C: The GPIO Control logic is powered by VTR and loses its configuration through a VTR POR.
DS00001956D-page 64
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