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參數(shù)資料
型號： W89C840AF
廠商： WINBOND ELECTRONICS CORP
元件分類： 微控制器/微處理器
英文描述： 100/10Mbps Ethernet Controller
中文描述： 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP128
封裝： PLASTIC, QFP-128
文件頁數(shù)： 60/82頁
文件大小： 918K
代理商： W89C840AF
W89C840AF
-
60
-
Publication Release Date:October 2000
Revision 1.01
14
R/W
RDCTL
BootROM Read Control.
When EESEL(bit 11 in this register) is reset, setting this bit will
perform the on-board boot ROM read operation with the reading
address specified by the register C28/CBROA. The one byte data
read from the on-board boot ROM will be latched into the bits field
EEBRD[7:0] of this register.
The bit RDCTL will be cleared automatically after BootROM read
operation is completed.
The RDCTL will not allow to be set high, even writing a logic 1 to
RDCTL if the bit EESEL(bit 11 in this register) is set.
13
R/W
WRCTL
BootROM Write Control.
When the bit EESEL (bit 11) is reset, setting this bit will trigger
the W89C840AF to perform the on-board boot ROM write
operation with the writing address specified by the register
C28/CBROA. The one byte write data should be latched by the
EEBRD[7:0] before setting the WRCTL high.
This bit will be cleared automatically if BootROM write operation is
completed.
The WRCTL will not allow to be set high, even writing a logic 1 to
WRCTL if the bit EESEL(bit 11 in this register) is set.
12
R
---
Reserved. Fixed at 0.
11
R/W
EESEL
EEPROM/BootROM Select
The on board boot ROM read/write function through CMIIR will be
enabled if the EESEL is reset. Otherwise, on board boot ROM
access function will be disabled and the CMIIR will be used to
access the on board EEPROM device if the EESEL is set to high.
10:8
R
---
Reserved. Fixed at 0.
7:4
R/W
EEBRD
[7:4]
EEPROM/Boot ROM Data 4 to 7:
The EEBRD[7:4] are used to store the read/write data for the on
board boot ROM access when EESEL is reset to low.
The data of EEBRD[7:4] is of no meaning if the EESEL is set to
high.
相關(guān)PDF資料
PDF描述
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W89C92 PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W89C840F 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN NODE CONTROLLER
W89C841D 制造商:WINBOND 制造商全稱:Winbond 功能描述:3-IN - 1 10/100M FAST ETHERNET CONTROLLER
W89C841F 制造商:WINBOND 制造商全稱:Winbond 功能描述:3-IN - 1 10/100M FAST ETHERNET CONTROLLER
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
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