FDC37B787-NS Standard Microsystems (SMSC), FDC37B787-NS Datasheet - Page 160
FDC37B787-NS
Manufacturer Part Number
FDC37B787-NS
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.FDC37B787-NS.pdf
(249 pages)
Specifications of FDC37B787-NS
Pin Count
128
Lead Free Status / RoHS Status
Compliant
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Size: 8-bits
PME Enable Register 2 (PME_EN2)
Register Location: <PM1_BLK>+Fh System I/O Space
Default Value: 00h on Vbat POR
Attribute: Read/Write (Note 0)
Size: 8-bits
SMI Registers
The FDC37B78x implements a group nSMI output pin. The nSMI group interrupt output consists of the
enabled interrupts from each of the functional blocks in the chip plus other SMI events. The interrupts
are enabled onto the group nSMI output via the SMI Enable Registers 1 and 2. The nSMI output is then
enabled onto the group nSMI output pin or Serial IRQ Frame (IRQ2) via bit[7] in the SMI Enable
Register 2. These SMI events can also be enabled as nPME/SCI events by setting the EN_SMI_PME
bit, bit[6] of SMI Enable Register 2.
This register is also used to enable the group nSMI output onto the nSMI Serial/Parallel IRQ pin and the
routing of 8042 P12 internally to nSMI.
The IRQ mux Register Bit 7 is used to select the SMI on the SMI pin or the Serial IRQ frame.
•
•
•
DEVINT_
GP17
The PME Enable registers enable the individual FDC37B78x wake sources onto the nPME bus.
When the PME Enable register bit for a wake source is active (“1”), if the source asserts a wake
event and the PME_En bit is “1”, the source will assert the PCI nPME signal.
When the PME Enable register bit for a wake source is inactive (“0”), the PME Status register will
indicate the state of the wake source but will not assert the PCI nPME signal.
EN
D7
D7
GP16
RTC_PME
D6
_EN
D6
GP15
D5
nRING
D5
GP14
D4
MOUSE
D4
GP13
D3
162
KBD
D3
GP12
D2
RI1
D2
GP11
D1
RI2
D1
GP10
D0
CIR
D0
DEFAULT
DEFAULT
0x00
0x00
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