w83c553f Winbond Electronics Corp America, w83c553f Datasheet - Page 122
w83c553f
Manufacturer Part Number
w83c553f
Description
System I/o Controller With Pci Arbiter
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83C553F.pdf
(159 pages)
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W83C553F
PCI Base and Sub Class Register (default = 0101h)
Type:
Bit Description:
Cache Line Size Register (default = 08h)
Function:
Type:
WINBOND SYSTEMS LABORATORY
Bits [15:8]:
Bits [7:0]:
Read/Write
This 8-bit register is programmed by the host to the cache line size being used by the system processor. It is
programmed in units of 32-bit double words. The programmed value effects the memory read and write
commands executed when the W83C553F is operating as a bus master. The default value is 08h. This
register can only be programmed to 04h (16 bytes), 08h (32 bytes), or 00h (4 bytes); all other values will be
ignored.
Read only
Sub Class. Permanently defaults to 01h - “IDE Controller.”
Base Class. Permanently defaults to 01h - “Mass Storage Controller.”
Electrical Specifications
119
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