參數(shù)資料
型號(hào): W89C880F
英文描述: LAN Hub Controller
中文描述: 局域網(wǎng)集線(xiàn)器控制器
文件頁(yè)數(shù): 29/72頁(yè)
文件大?。?/td> 731K
代理商: W89C880F
W89C840F
Publication Release Date:April 1997
Revision A1
- 29 -
F08/FREV Device Revision Register
This register, a read-only with built-in code, shows W89C840F revision number and its class
code.
Bit
Attribute
Bit name
Description
31:24
R
BC
Base Class Code.
Fixed at 02h to indicate a network controller.
23:16
R
SC
Subclass Code.
Fixed at 00h to indicate a Ethernet controller.
15:8
R
IC
Interface Code. Fixed at 0.
7:0
R
REV
Revision ID.
This field represents the revision number.
Loaded from EEPROM after hardware reset de-asserted
F0C/FLT Latency Timer Register
This register specifies the W89C840F master bus latency timer.
Bit
Attribute
Bit name
Description
31:16
R
---
Fixed to 0.
15:8
R/W
LT
Latency Timer.
Specify, in units of PCI clocks, the latency timer value of
W89C840F. When W89C840F asserts FRAMEB, its latency timer
starts counting up. The W89C840F will initiate the transaction
termination when its GNT# de-asserted If the timer expired before
W89C840F de-asserts FRAMEB.
7:0
R
---
Fixed at 0.
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