MEC1404 Datasheet, PDF (335/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 22-2: REGISTER SUMMARY (CONTINUED)
Offset
Register Name
6A0h - 6B8h GPIO160-GPIO166 Pin Control Register 2
Note 22-3
Note 22-4
Note 22-5
The GPIO input and output registers are LPC I/O accessible via Region 0 of the EMI block. This
access is defined in the EMI Protocols chapter of the firmware specification.
There is no Pin Control Register 2 for GPIO064 and GPIO067, which are PCI_PIO buffer type pins.
The drive strength and slew rate are not configurable on these pins.
The drive strength and slew rate are not configurable for the LPC functions on GPIO034, GPIO061,
GPIO063, and GPIO40 - GPIO044 since they are controlled by the PCI_PIO type buffers.
22.6.1 PIN CONTROL REGISTERS
Two Pin Control Registers are implemented for each GPIO. The Pin Control Register format is described in Section
22.6.1.1, "Pin Control Register," on page 335. The Pin Control Register 2 format is described in Section 22.6.1.2, "Pin
Control Register 2," on page 339. Pin Control Register address offsets and defaults for each product are defined in
Section 22.5.4.1, "MEC140x Pin Control Registers Defaults," on page 326, and Section 22.5.4.2, "MEC141x Pin Control
Registers Defaults," on page 329.
22.6.1.1 Pin Control Register
Offset ^{See Table 22-2, "Register Summary"}
Bits
Description
Type
Default
Reset
Event
31:25 RESERVED
RES
24 GPIO input from pad
R
On reads, Bit [24] reflects the state of GPIO input from the pad
regardless of setting of Bit [10].
Note:
This bit is forced high when the selected power well is off
as selected by the Power Gating Signal bits. See
bits[3:2].
23:17 RESERVED
RES
16 GPIO output data
R/W
If enabled by the GPIO Output Control Select bit, the GPIO output
data bit determines the level on the GPIO pin when the pin is config-
ured for the GPIO output function.
(GPIO
Output
Control
Select =
On writes:
0)
If enabled via the GPIO Output Control Select
0: GPIO[x] out = ‘0’
R
1: GPIO[x] out = ‘1’
(GPIO
Note:
If disabled via the GPIO Output Control Select then the
GPIO[x] out pin is unaffected by writing this bit.
Output
Control
Select=1
On reads:
)
Bit [16] returns the last programmed value, not the value on the pin.
15:14 RESERVED
RES
-
Note 22-6
-
Note 22-6
-
-
nSYSRS
T
-
nSYSRS
T
-
 2015 - 2016 Microchip Technology Inc.
DS00001956D-page 335