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參數資料
型號: W89C841F
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 3-IN - 1 10/100M FAST ETHERNET CONTROLLER
中文描述: 2 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP128
封裝: 14 X 20 X 2.75 MM, QFP-128
文件頁數: 73/102頁
文件大小: 1154K
代理商: W89C841F
W89C841F/D
Publication Release Date: October 18, 2001
- 73 -
Revision A3
Dc0/DBRAR Boot ROM Access Register
The register is used to specify the control function and the data message passing for the on board
Boot ROM.
BIT
31
30:28
ATTRIBUTE
R
R/W
BIT NAME
-
BROMSEL Boot ROM Size Select
BROMSEL bits decides the size of the on board boot ROM
device.
00x = No Boot ROM
010 = 8K
011 = 16K
100 = 32K
101 = 64K
110 = 128K
111 = 256K
Loaded from EEPROM after Power-on reset.
BROMRD
BootROM Read Control
When EESEL bit of register Dc4/DEEAR[31] is reset, setting
this bit will perform the on-board boot ROM read operation
with the reading address specified by bits BROMA. The bit
BROMRD will be cleared automatically after BootROM read
operation is completed. Bit BROMRD will not allow to be set
high, even writing a logic 1 to BROMRD if the bit EESEL is
set.
BROMWR
BootROM Write Control
When EESEL bit of register Dc4/DEEAR[31] is reset, setting
this bit will perform the on-board boot ROM write operation
with the writing address specified by BROMA. This bit
BROMWR will be cleared automatically after BootROM write
operation is completed. The BROMWR will not allow to be
set high, even writing a logic 1 to BROMWR if the bit EESEL
is set.
BROMA
Boot ROM Offset Address
This field contains boot ROM offset address.
BROMD
Boot ROM Data
BROMD are used to store the read/write data for the on
board Boot ROM access when EESEL is reset to low.
BROMD is of no meaning if the EESEL is set to high.
DESCRIPTION
Reserved. Fixed to 0.
27
R/W
26
R/W
25:8
R/W
7:0
R/W
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相關代理商/技術參數
參數描述
W89C841F/D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-IN-1 100BASE-TX/FX & 10BASE-T Ethernet Controller
W89C880F 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Hub Controller
W89C92 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
W89C926 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
W89C926F 制造商:WINBOND 制造商全稱:Winbond 功能描述:10M PCMCIA Ethernet Network Interface Controller