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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: 31/102頁
文件大小: 1154K
代理商: W89C841F
W89C841F/D
Publication Release Date: October 18, 2001
- 31 -
Revision A3
ROM SIZE
DC0/DBRAR[30:28]
F30/FERBA
None
000b
0000_0000h
None
001b
0000_0000h
8 Kbytes
010b
FFFF_E001h
16Kbytes
011b
FFFF_C001h
32Kbytes
100b
FFFF_8001h
64Kbytes
101b
FFFF_0001h
128Kbytes
110b
FFFE_0001h
256Kbytes
111b
FFFC_0001h
The address decoder of W89C841F for accessing the on-board BootROM will be enabled if both the
bit 0 of F30/FERBA and the bit 1 of F04/FCS are set to high at the same time.
On-board Boot ROM
data will be fetched by W89C841F and are loaded into the host memory. On the other hand, the
address decoder will be disabled if the bit 0 of F30/FERBA is reset to 0. Under this case, W89C841F
will ignore the Dc0/DBRAR, no matter what content it has.
Usually on-board BootROM data can be read by the system BIOS during host system booting or
power-on reset. W89C841F also provides an access method by register Dc0/DBRAR and
Dc0/DEEAR[31] to read or write Flash memory on Restore Card applications. If BootROM interface is
chosen to be accessed, the bit EESEL of register Dc4/DEEAR[31] must be set to 0 at first. The read
and write process for BootROM or Flash through register Dc0/DBRAR is listed in the following table.
COMMAND
STEP
Read
1) Set BootROM access bit EESEL (Dc4/DEEAR[31]) to 0.
2) Set the BootROM/Flash offset address to bits BROMA
3) Set BootROM/Flash read control bit BROMRD to 1.
4) Waiting for read operation completed until bit BROMRD change to 0.
5) Read back the data from bits BROMD
Write
1) Set BootROM access bit EESEL (Dc4/DEEAR[31]) to 0.
2) Set the Boot ROM offset address to bits BROMA
3) Write data to bits BROMD
4) Set BootROM write control bit BROMWR to 1.
5) Waiting for write operation completed until bit BROMWR change to 0.
相關PDF資料
PDF描述
W89C880F 100Base-Tx/T4 Multiport Repeater Controller(100Base-Tx/T4多端口中繼器控制器)
W89C92 PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
W89C926 PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
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W89C940 ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE)
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