參數(shù)資料
型號(hào): AM79C972BKIW
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
中文描述: 5 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16
封裝: PLASTIC, QFP-160
文件頁(yè)數(shù): 30/130頁(yè)
文件大?。?/td> 1580K
代理商: AM79C972BKIW
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)當(dāng)前第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)
30
Am79C972
Expansion ROM Transfers
The host must initialize the Expansion ROM Base Ad-
dress register at offset 30H in the PCI configuration
space with a valid address before enabling the access
to the device. The Am79C972 controller will not react to
any access to the Expansion ROM until both MEMEN
(PCI Command register, bit 1) and ROMEN (PCI Ex-
pansion ROM Base Address register, bit 0) are set to 1.
After the Expansion ROM is enabled, the Am79C972
controller will assert DEVSEL on all memory read ac-
cesses with an address between ROMBASE and
ROMBASE + 1M - 4. The Am79C972 controller aliases
all accesses to the Expansion ROM of the command
types
Memory Read Multiple
and
Memory Read Line
to
the basic Memory Read command. Eight-bit, 16-bit,
and 32-bit read transfers are supported.
Since setting MEMEN also enables memory mapped
access to the I/O resources, attention must be given
the PCI Memory Mapped I/O Base Address register
before enabling access to the Expansion ROM. The
host must set the PCI Memory Mapped I/O Base Ad-
dress register to a value that prevents the Am79C972
controller from claiming any memory cycles not in-
tended for it.
The Am79C972 controller will always read four bytes
for every host Expansion ROM read access. TRDY will
not be asserted until all four bytes are loaded into an in-
ternal scratch register. The cycle TRDY is asserted de-
pends on the programming of the Expansion ROM
interface timing. The following figure (Figure 5) as-
sumes that ROMTMG (BCR18, bits 15-12) is at its de-
fault value.
Note:
The Expansion ROM should be read only during
PCI configuration time for the PCI system.
When the host tries to write to the Expansion ROM, the
Am79C972 controller will claim the cycle by asserting
DEVSEL. TRDY will be asserted one clock cycle later.
The write operation will have no effect. Writes to the Ex-
pansion ROM are done through the BCR30 Expansion
Bus Data Port. See the section on the
Expansion Bus
Interface
for more details. See Figure 5.
Figure 5. Expansion ROM Read
FRAME
CLK
AD
IRDY
TRDY
C/BE
DEVSEL
STOP
PAR
ADDR
CMD
PAR
1
2
3
4
5
48
49
50
51
DATA
PAR
BE
DEVSEL is sampled
21485C-8
相關(guān)PDF資料
PDF描述
AM79C972BVCW PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972 PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BVIW PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C974 PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
AM79C974KCW PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C972BVC 制造商:Advanced Micro Devices 功能描述:
AM79C972BVC\W 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 176-Pin TQFP Tray 制造商:Advanced Micro Devices 功能描述:5 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP176
AM79C972BVCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
AM79C972BVD\\W 制造商:Advanced Micro Devices 功能描述:
AM79C972BVD\W 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 176-Pin TQFP Tray