- 您現在的位置：買賣IC網 > PDF目錄366550 > AM79C972BKIW (ADVANCED MICRO DEVICES INC) PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support PDF資料下載
參數資料
| 型號： | 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 |
| 文件頁數： | 37/130頁 |
| 文件大?。?/td> | 1580K |
| 代理商： | AM79C972BKIW |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁當前第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁
Am79C972
37
Figure 15 shows a typical burst write access. The
Am79C972 controller arbitrates for the bus, is granted
access, and writes four 32-bit words (DWords) to the
system memory and then releases the bus. In this ex-
ample, the memory system extends the data phase of
the first access by one wait state. The following three
data phases take one clock cycle each, which is deter-
mined by the timing of TRDY. The example assumes
that EXTREQ (BCR18, bit 8) is set to 1, therefore, REQ
is not deasserted until the next to last data phase is fin-
ished.
Target Initiated Termination
When the Am79C972 controller is a bus master, the cy-
cles it produces on the PCI bus may be terminated by
the target in one of three different ways: disconnect
with data transfer, disconnect without data transfer, and
target abort.
Disconnect With Data Transfer
Figure 16 shows a disconnection in which one last data
transfer occurs after the target asserted STOP. STOP
is asserted on clock 4 to start the termination se-
quence. Data is still transferred during this cycle, since
both IRDY and TRDY are asserted. The Am79C972
controller terminates the current transfer with the deas-
sertion of FRAME on clock 5 and of IRDY one clock
later. It finally releases the bus on clock 7. The
Am79C972 controller will again request the bus after
two clock cycles, if it wants to transfer more data. The
starting address of the new transfer will be the address
of the next non-transferred data.
Figure 15.
Burst Write Transfer (EXTREQ = 1)
FRAME
CLK
AD
IRDY
TRDY
C/BE
DEVSEL
REQ
GNT
1
2
3
4
5
6
7
8
ADDR
DATA
DATA
DATA
BE
0111
9
PAR
PAR
PAR
PAR
PAR
DATA
PAR
DEVSEL
is sampled
21485C-18
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。