w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 113
w83c554f
Manufacturer Part Number
w83c554f
Description
System I/o Controller With Pci Arbiter & Ultradma/33 Ide Controller
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83C554F.pdf
(156 pages)
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W83C554F
Device Command Register (default = 0000h)
Function:
Type:
Bit Description:
WINBOND ELECTRONICS CORP. AMERICA
Bit [15:9]:
Bit 8:
Bit 7:
Bit 6:
Bit 5:
Read/Write
The Device Command Register provides coarse control over the device's ability to generate and respond to
I/O cycles. Since the default value disables the IO decode, it must be programmed by the BIOS/Firmware
to enable this function.
These bits are reserved and hardwired to a logic 0b.
SERR. When this bit is 1b, the SERR# output driver is enabled. A system error will only be
reported for address parity errors. Bit 6 PARITY must also be enabled, or no error will be
reported. Bit 8 is a 0b after a reset.
This bit is not used and is hardwired to a logic 0b.
PARITY. This is the enable bit for the PERR# output driver. When bit 6 is a 1b, slave write data
parity errors, and master memory read data parity errors, will be reported on PERR#. Write
data parity errors are only reported for bus cycles claimed by the W83C554F (DEVSEL#
asserted). Bit 6 is a 0b after a reset.
This bit is not used and is hardwired to a logic 0b.
Register Information
111
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