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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: 64/82頁
文件大小: 918K
代理商: W89C840AF
W89C840AF
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64
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Publication Release Date:October 2000
Revision 1.01
The C44/CPA1 defines the last 16 bits of the 48 bits MAC address. The CPA1 value is loaded from EEPROM after
hardware reset
Bit
Attribute
Bit name
Description
31:16
R
---
Reserved. Fixed at 0.
15:8
R/W
PAR5
Physical Address 5.
The PAR5 defines the 40~47 bit of the 48 bit of the MAC address.
7:0
R/W
PAR4
Physical Address 4.
The PAR0 defines the 32~39 bit of the 48 bit of the MAC address.
C48/CBRCR Boot ROM Size Configuration Register
This register is used to configure the size of the boot ROM. The bit 0 to bit 2 of the register C48/CBRCR are loaded
form the external EEPROM after the deasserted of the hardware reset. The configuration of the BPS[2:0] will affect
the return value from the register F30/FERBA to determine how large the expansion memory space the on-board
boot ROM needs when it is read by the power-on software.
Bit
Attribute
Bit name
Description
31:3
R
---
Reserved. Fixed at 0.
2:0
R/W
BPS[2:0]
Boot ROM Size Select.
The size of the on board boot ROM device is selected by BPS[2:0]
as follows.
BPS2 BPS1 BPS0 Size
------------------------- ----------------------
0 0 X No Boot ROM
0 1 0 8K
0 1 1 16K
1 0 0 32K
1 0 1 64K
1 1 0 128K
1 1 1 256K
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