W83629D Ver la hoja de datos (PDF) - Winbond

Número de pieza

componentes Descripción

Fabricante

W83629D

PCI TO ISA BRIDGE SET

Winbond 

W83628F & W83629D

8.8 IO_RCVR-IO RECOVERY REGISTER

Address Offset: 40h

Default Value:

4Dh

Attribute:

Read/Write

Bit 7

SYSCLK Divider.

0 = SYSCLK is equal to PCICLK divided by 4.

1 = SYSCLK is equal to PCICLK divided by 3.

Bit 6

8-bit I/O Recovery Enable

0 = Disable bits 5:3 setting and uses 3.5 SYSCLKs for 8 bit I/O recovery time.

1 = Enable bits 5:3 setting.

Bit 5:3

8-bit I/O RecoveryTimes.

When bit 6=1 ,this 3-bit field defines the additional number of SYSCLKs added

to standard 3.5 SYSCLK recovery time for 8 bit I/O

000 =0 SYSCLK

001 =1 SYSCLK

010 =2 SYSCLKs

011 =3 SYSCLKs

100 =4 SYSCLKs

101 =5 SYSCLKs

110 =6 SYSCLKs

111 = 7 SYSCLKs

Bit 2

16-bit I/O Recovery Enable.

= 0 Ignore bits 1:0 setting and uses 3.5 SYSCLKs for 16-bit I/O recovery time.

= 1 The 16-bit I/O recovery time is decided by bits 1:0.

Bit 1:0

16-bit I/O Recovery Times.

When bit 2=1 ,this 2-bit field defines the additional number of SYSCLKs added

to standard 3.5 SYSCLK recovery time for 16 bit I/O

= 01 1 SYSCLK

= 10 2 SYSCLKs

= 11 3 SYSCLKs

= 00 4 SYSCLKs

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Publication Release Date: May 18, 2005

Revision A1

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