w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 118
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
Programming Interface Register ( Default = 8Ah)
Function:
Type:
Bit Description:
WINBOND ELECTRONICS CORP. AMERICA
Bit 7:
Bit [6:4]:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
Read/Write
There are no PCI predefined configuration register sets released for this class of device but the PCI SIG has
generated two proposed interfaces which are both supported. The first interface defines native and legacy
IDE devices and is described in PCI Rev. 2.1 spec. The Programming Interface register will support both
the native and legacy modes. Also the PCI SIG group has proposed a programming interface for Bus
Master IDE controllers. This register set and protocol is fully supported as indicated by bit 7 of this register
being set.
Bus Master. This bit is hardwired to logic 1 to indicate support of the IDE BUS MASTER
register set and protocol.
These bits are reserved and hardwired to logic 0.
P1PROG. Port 1 Programmable is hardwired to a 1b. This indicates that bit 2 of this register is
R/W.
If this bit is 1b, indicating in native mode, base address register (2 and 3) can be programmed.
If it is 0b, indicating legacy mode, they can not be programmed and default address will be
used.
P0PROG. Port 0 Programmable is hardwired to a 1b. This indicates that bit 0 of this register is
R/W.
If this bit is 1b, indicating in native mode, base address register (0 and 1) can be programmed.
If it is 0b, indicating legacy mode, they can not be programmed and default address will be
used.
Register Information
116
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