W83C554F datasheet(63/156 Pages) WINBOND

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W83C554F Datasheet(PDF) 63 Page - Winbond

Part #	W83C554F

Description	SYSTEM I/O CONTROLLER WITH PCI ARBITER & UltraDMA/33 IDE Controller

Download	156 Pages

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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63 / 156 page

W83C554F

WINBOND ELECTRONICS CORP. AMERICA

BIOS Timer Base Address Register (default = 0078h)

Type:

Read/Write

Function:

The base address for the BIOS Timer Register located in PCI I/O space. The BIOS Timer resides in the

W83C554F and is the only internal resource mapped to PCI I/O space.

Bit Description:

Bits [15:2]:

BTMRBA. BIOS Timer Base Address. This register specifies the Base Address 15:2 for the

BIOS Timer register located in the I/O space. The lower two bits of the base address are 00

(Dword aligned). The value of this register points to 78h (0000_0000_0111_10xx) after a reset.

Bit 1:

Reserved.

Bit 0:

BTMRE. Timer Enable. When this bit is set to "1", the BIOS timer function is enabled and the

base address of the timer registers is programmed in Bits [15:2].

Manufacturer	Part #	Datasheet	Description
Winbond	W83C553F	3Mb / 159P	SYSTEM I/O CONTROLLER WITH PCI ARBITER

Manufacturer	Part #	Datasheet	Description
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