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參數資料
| 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： | 35/82頁 |
| 文件大小： | 918K |
| 代理商： | W89C840AF |
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W89C840AF
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35
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Publication Release Date:October 2000
Revision 1.01
31:13
R/W
EROMB
Expansion ROM Base Address.
Written by power-on software to specify expansion ROM base
address.
The W89C840AF will request op to 256K bytes memory space for
the on board boot ROM device according the configuration of
C48/CBRCR.
The return back read value of bit 0 to bit 17 of F30/FERBA will
depend on the configuration of C48/CBRCR.
12:1
R
---
Reserved. Fixed at 0.
0
R/W
ROME
Expansion ROM Enable.
Set both this bit and F04/FCS bit 1 to 1 to enable expansion ROM
access ability. The F04/FCS bit 1 has precedence over this bit.
F34/FCAPPR Capabilities Pointer Register
(Offset + 34H)
Value after Hard-Reset:
00000000H or 000000dcH
Bit
Attribute
Bit name
Description
31:8
R
---
Reserved. Fixed at 0.
7:0
R
CAPPR
Capabilities Pointer
The Capabilities Pointer provide the offset into the PCI
Configuration Space for the location of Power Management
Register Block.
After Hard-Reset, if PMCSP=1 then CAPPR is fixed at dcH.
After Hard-Reset, if PMCSP=0 then CAPPR is fixed at 00H.
F3C/FIR Interrupt Register
The upper half of this register is loaded from external serial EEPROM while the lower half is written
.
The
W89C840AF will issue a Retry signals to host when the host tries to access to this register while the EEPROM auto-
loading is not yet completed.
Bit
Attribute
Bit name
Description
31:24
R
MAXLAT Max_Lat.
This indicates how often, in units of 0.25uS, the W89C840AF needs
to gain
access to PCI bus. Assuming PCI clock rate is 33 MHz.
23:16
R
MINGNT
Min_Gnt.
This indicates how long a burst period, in units of 0.25uS, is needed
by the W89C840AF. Assuming PCI clock rate is 33 MHz.
15:8
R
IPIN
Interrupt Pin.
Fixed at 01H to indicate INTA# is used.
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相關代理商/技術參數 |
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|---|---|
| W89C840F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN NODE CONTROLLER |
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| 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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