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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)： 61/82頁
文件大小： 918K
代理商： W89C840AF
W89C840AF
-
61
-
Publication Release Date:October 2000
Revision 1.01
3:0
R/W
EEBRD
[33:0]
EEPROM/Boot ROM Data 0 to 3:
The EEBRD[3:0] are used to store the read/write data for the on-
board boot ROM access when EESEL is reset to low.
When EESEL is set to high,
1) the EEBRD[3] reflects the input data from the BtAdata3/EEDO
pin(connected to EEPROM data output) instantly.
2) the EEBRD[2] stores the output data which will be drove onto
the BtAdata2/EEDI pin(connected to EEPROM data input) directly.
3) the EEBRD[1] stores the output data which will be drove onto
the BtAdata1/EECK pin (EEPROM serial clock input) directly.
4) the EEBRD[0] stores the output data which will be drove onto
the EECS pin(connected to EEPROM chip select) directly.
For accessing the external EEPROM device, the chip select signal,
the serial clock and the data input should follow the AC
specification defined by the external EEPROM device.
C28/CBROA Boot ROM Offset Address Register
The register C28/CBROA is used to specify the read or write address of the external boot ROM when accessing the
boot ROM through the register C24/CMIIR of the W89C840AF
.
Bit
Attribute
Bit name
Description
31:18
R
---
Reserved. Fixed at 0.
17:0
R/W
BROA
Boot ROM Offset Address.
This field contains boot ROM offset address.
C2C/CGTR General Timer Register
The C2C/CGTR shows the real time content of the W89C840AF
internal general timer
Bit
Attribute
Bit name
Description
31:17
R
---
Reserved. Fixed at 0.
16
R/W
RECUR
Recursive Mode:
The state of the bit 0 to bit 15 in the register C2C/CGTR will be set
to the states programmed by the driver program at the last time
when the TIME timer count reaching zero if the RECUR is set to
high. Default 0.
相關(guān)PDF資料
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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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