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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： 26/82頁
文件大小： 918K
代理商： W89C840AF
W89C840AF
-
26
-
Publication Release Date:October 2000
Revision 1.01
The data mapping and its offset address for all of the above parameters is as the following table.
Address
High Byte (BIT 15 ~ BIT 8)
Low Byte (BIT 7 ~ BIT 0)
09H~3FH
reserved
reserved
08H
PMCSP/RWUL/C48
Revision ID
07H
Vendor ID(high byte)
Vendor ID(low byte)
06H
Device ID(high byte)
Device ID(low byte)
05H
Subsystem Vendor ID(high byte)
Subsystem Vendor ID(low byte)
04H
Subsystem ID(high byte)
Subsystem ID(Low byte)
03H
MAXLAT
MINGNT
02H
Ethernet Address 5
Ethernet Address 4
01H
Ethernet Address 3
Ethernet Address 2
00H
Ethernet Address 1
Ethernet Address 0
The W89C840AF will generate a nine-word reading command to the EEPROM to read the
configuration data and store these data into the configuration registers and the control register of the
W89C840AF after hardware reset. The serial EEPROM 93C06 or 93C46 will be the choice as the storage
device for storing these configuration data.
Other than the reading after hardware reset, the EEPROM can be read by the application program.
The C24/CMIIR register provides an alternative path to access the data in EEPROM. The bits 0, 1, 2, ... and 7
of CMIIR are general I/O port. When the bit 11 of CMIIR is set to high,
the bits 0, 1 and 2 will be put on the
EECS, BtAdata1/EECK, and BtAdata2/EEDI, respectively , to trigger EEPROM. The data from EEPROM
running over the pin BtAdata3/EEDO will be hold and latched by the bit 3 of CMIIR, and be read by
W89C840AF. The application program can program bits 0, 1 and 2 of CMIIR to generate the chip select
signal, clock and read command, based on the AC timing spec. of the EEPROM device, to
EEPROM, and
running over the pins EECS, BtAdata1/EECK, and BtAdata2/EEDI respectively. For reading the output data
from EEPROM, the application program should make the necessary level transition as a clock on
BtAdata1/EECK. One falling edge will trigger the EEPROM device to drive the next bit of output data
relative to the input command.
The EEPROM can be programmed through the general I/O port of the W89C840AF. The application
program can write data into the EEPROM through programming the bits 0, 1 and 2 of the register CMIIR. In
the write cycle of the EEPROM device, the data on BtAdata3/EEDO is meaningless.
BOOT ROM system read and software programming function
The W89C840AF can address up to 256 Kbytes memory space for the on-board boot ROM device. The
on-board boot ROM device will be mapped into the host memory by the system BIOS (Basic Input/Output
System). After power-on reset, The BIOS will write a set of value with all 1 to the F30/FERBA configuration
register and then read the value back. The W89C840AF will return the all 1 value, except some bits with 0,
相關PDF資料
PDF描述
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W89C92 PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER
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相關代理商/技術參數
參數描述
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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