LPC47M172_07 SMSC [SMSC Corporation], LPC47M172_07 Datasheet - Page 152

• Manufacturer Part Number: LPC47M172_07
• Description: Advanced I/O Controller with Motherboard GLUE Logic
• Manufacturer: SMSC [SMSC Corporation]

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
SMSC/Non-SMSC Register Sets (Rev. 01-11-07)
PME_STS1
Default = 0x00
N/A
PME_EN3
Default = 0x00
on VTR POR
on VTR POR
NAME
REG OFFSET
(Type)
(R/W)
(R/W)
0x0C
0x0A
0x0B
(R)
DATASHEET
PME Wake Status Register 1
This register indicates the state of the individual PME
wake sources, independent of the individual source
enables or the PME_En bit.
If the wake source has asserted a wake event, the
associated PME Wake Status bit will be a “1”.
Bit[0] Reserved (Note 1)
Bit[1] RI2
Bit[2] RI1
Bit[3] KBD
Bit[4] MOUSE
Bit[5] SPEKEY (Wake on specific key)
Bit[6] FAN_TACH1 (Note)
Bit[7] FAN_TACH2 (Note)
The PME Wake Status register is not affected by Vcc
POR, SOFT RESET or HARD RESET.
Writing a “1” to Bit[7:0] will clear it. Writing a “0” to any
bit in PME Wake Status Register has no effect.
Note:
Bits[7:0] Reserved – reads return 0
PME Wake Status Register 3
This register is used to enable individual LPC47M172
PME wake sources onto the nIO_PME wake bus.
When the PME Wake Enable register bit for a wake
source is active (“1”), if the source asserts a wake event
so that the associated status bit is “1” and the PME_En
bit is “1”, the source will assert the nIO_PME signal.
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] GP20
Bit[1] GP21
Bit[2] GP22
Bit[3] GP23
Bits[7:4] Reserved
The PME Wake Enable register is not affected by Vcc
POR, SOFT RESET or HARD RESET.
Page 152
When the GP1x/FAN_TACHx pin is configured as a
GPIO (GPIO control register bit 2 = 0), the
associated PME status bit will never be set.
When the pin is configured for the tachometer
function (GPIO control register bit 2 = 1) and then
the function is switched to the GPIO function, the
associated PME status bit will be cleared.
DESCRIPTION
SMSC LPC47M172