198
NAME
REG OFFSET
(hex)
6C
(R/W)
DESCRIPTION
PME_EN7
Default = 0x00 on
VTR POR
PME Enable Register 7
When the PME Wake Enable register bit for a wake
source is inactive (“0”), the PME Wake Status register
will indicate the state of the wake source but will not
assert the nIO_PME signal.
Bit[0] GP34
Bit[1] GP35
Bit[2] GP36
Bit[3] GP37
Bit[4] Reserved
Bit[5] Reserved
Bit[6] Reserved
Bit[7] GP62
User Note:
When selecting an alternate function for a GPIO pin, all bits in the GPIO register must
be properly programmed, including in/out, polarity and output type. The polarity bit
does not affect the DDRC function or the either edge triggered interrupt functions.
If this pin is used for Ring Indicator wakeup, either the nRI2 event can be enabled via
bit 1 in the PME_EN1 register or the GP50 PME event can be enabled via bit 0 in the
PME_EN5 register.
In order to use the P12, P16 and P17 functions, the corresponding GPIO must be
programmed for output, non-invert, and push-pull output type.
The P12 function should not be selected on GP21 and GP22 simultaneously. If P12 is
selected on GP21 and GP22, simultaneously, then P12 will function on GP22, not on
GP21.
The P17 function should not be selected on GP20 and GP62 simultaneously. If P17
is selected on GP20 and GP62, simultaneously, then P17 will function on GP62, not
on GP20.
User Note 1:
User Note 2:
Note 1: If the EETI function is selected for this GPIO then both a high-to-low and a low-to-high edge
will set the PME, SMI and MSC status bits.
Note 2: These pins default to an output and LOW on VCC POR and Hard Reset.
Note 3: If the FDC function is selected on this pin (nMTR1, nDS1, DRVDEN0, DRVDEN1) then bit 6 of
the FDD Mode Register (Configuration Register 0xF0 in Logical Device 0) will override bit 7 in
the GPIO Control Register. Bit 7 of the FDD Mode Register will also affect the pin if the FDC
function is selected.
Note 4: The nIO_SMI pin is inactive when the internal group SMI signal is inactive and when the SMI
enable bit (EN_SMI, bit 7 of the SMI_EN2 register) is ‘0’. When the output buffer type is OD,
nIO_SMI pin is floating when inactive; when the output buffer type is push-pull, the nIO_SMI
pin is high when inactive.
Note 5: If GP52 and GP53 are programmed for RXD2 and TXD2 functions and serial port 2 is
programmed for IR operation, then these pins will have IR functionality and when serial port 2
is disabled, the TXD2 pin will TRISTATE. If these pins are programmed for IRRX and IRTX
then these pins will have IR functionality and when serial port 2 is disabled, the IRTX pin will
go to its inactive state.
Note 6: The GP61 pin defaults to the LED function active (blinking at 1Hz rate, 50y duty cycle) on initial
power up (as long as the 32kHz clock input is active).