W83877ATG Nuvoton Technology Corporation of America, W83877ATG Datasheet - Page 145

• Manufacturer Part Number: W83877ATG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83877ATG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

IRQMODS (Bit 2):
IRQ mode seleection. W83877ATF/ATG supports: (1) legacy ISA IRQ mode or ISA IRQ sharing
mode. (2) Serial IRQ mode used in the PCI bus. In the legacy ISA IRQ sharing mode, the selected
IRQ pin for the device's IRQ is defined in the configuration registers CR27 - CR29. In the ISA IRQ
sharing mode, configuration register CR18 indicates which IRQ pin is in the IRQ sharing mode.
Bit 1 - bit 0: Reserved.
11.2.40
When the device is in Extended Function mode and EFIR is 32H, the CR32 register can be accessed
through EFDR. The bit definitions are as follows:
CHIPPME (Bit 7): W83877ATF/ATG chip power management enable.
Bit 6 - bit 4: Reserved.
PRTPME (Bit 3): Printer port power management enable.
FDCPME (Bit 2): FDC power management enable.
0
1
0
1
0
1
0:
1:
Configuration Register 32 (CR32), default=00H
disable the ACPI/Legacy and the auto power management functions.
enable the ACPI/Legacy and the auto power management functions.
disable the auto power management function.
enable the auto power management function, if this bit and CHIPPME(CR32 bit 7) are
both set to 1.
disable the auto power management function.
enable the auto power management function, if this bit and CHIPPME(CR32 bit 7) are
both set to 1.
legacy ISA IRQ mode or ISA IRQ sharing mode.(default)
Serial IRQ mode used in PCI bus.
7
6
5
4
3
- 138 -
2
W83877ATF/W83877ATG
1
0
URBPME
URAPME
FDCPME
PRTPME
reserved
reserved
reserved
CHIPPME