- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45179 > MB86965A 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 PDF資料下載
參數(shù)資料
| 型號： | MB86965A |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁數(shù)： | 37/76頁 |
| 文件大小： | 394K |
| 代理商： | MB86965A |
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(dāng)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
MB86965
42
BUFFER CONTROLLER
Figure 10. Buffer Memory Organization
As shown in Figure 10, EtherCoupler uses dedicated
buffer memory to store data packets to be transmitted to
and received from the network. By direct connection to
the EtherCoupler controller rather than a separate, local
microprocessor bus, buffer memory eliminates the need
for a local microprocessor. The Buffer Controller keeps
track of buffer memory partitioning, as well as
automatically allocating and updating receive and
transmit pointers, eliminating these tasks from software
overhead. Benchmark performance tests typically can
surpass those of competing controllers because Ether-
Coupler provides a high level of automation and
high-performance packet-buffering.
EtherCoupler on-chip Buffer Controller manages access
to buffer memory by updating internal address pointers,
which handle transmit, retransmit, receive, rejection of
packets with errors, and data transfers to and from the
host. The easy-to-operate EtherCoupler access-manage-
ment feature relieves the host of buffer-management
functions and substantially reduces software require-
ments. EtherCoupler automatically rejects packets with
alignment, CRC or short-length errors. Packet rejection
occurs unless the host sets the Acpt Bad Pkts bit, which
passes packets received with errors to the host processor
and sets appropriate error status bits to inform the host of
the error. EtherCoupler allows reception of packets as
small as six bytes by setting the Acpt short Pkts bit.
Normal operation requires IEEE minimum packet
length, excluding Preamble and CRC, of 60 bytes.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB88151APNF-G-500-JNE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-401-JNEFE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-801-JNERE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-400-JNERE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-200-JNEFE1 | OTHER CLOCK GENERATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB86965B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:EtherCoupler ETHERNET CONTROLLER WITH 10BASE?T TRANSCEIVER |
| MB86965BPF-G-BND | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:EtherCoupler ETHERNET CONTROLLER WITH 10BASE?T TRANSCEIVER |
| MB86967 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces |
| MB86967PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces |
| MB86977 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:IP PACKET FORWARDING ENGINE |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。