w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 78
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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
PCI Arbiter Control Register (default = 80h)
Type:
Bit Description:
WINBOND ELECTRONICS CORP. AMERICA
Bit 7:
Bit [6:5]:
Bits [4:3]:
Bit 2:
Bit 1:
Bit 0:
Read/Write
GAT. Guaranteed Access Timing. If set to a 1b, this bit enables Function 0 Flush Request and
Flush Acknowledge operation on pins 6 and 7 (provided pin 13 is not pulled low after reset).
This bit defaults to a 1b.
Reserved.
Arbiter Timeout Timer Value [2:0]
Number of clocks to wait for FRAME# to asset after GNT# is asserted
00 ATO time out after 16 clocks
01 ATO time out after 4 clocks
10 ATO time out after 8 clocks
11 ATO time out after 32 clocks
Arbiter Timeout Timer Enable.
CPU Park Enable. Otherwise the arbiter will park on the last master. 0=Enable.
Bus Lock Enable. If set to 1b, this bit converts a PCI Lock cycle to a bus lock. If this bit is 0b,
the PCI arbiter ignores the LOCK# signal on the PCI bus.
Register Information
76
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