參數(shù)資料
型號： MB86967
廠商： Fujitsu Limited
英文描述： LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces
中文描述： 局域網(wǎng)控制器與PC卡，ISA總線和通用總線接口
文件頁數(shù)： 78/129頁
文件大?。?/td> 1499K
代理商： MB86967
78
MB86967
2. What’s in a Driver
Typical node drivers manage the movement of packet data between system memory and the network, and vice
versa, as well as providing diagnostic testing, error processing, and error statistics on-demand for the system.
The first thing a driver does when the system is powered up is system check-out, which may include buffer
memory testing, and loopback testing of the transmit and receive circuits. If the network supports it, as does
Ethernet, for example, the testing may include sending and receiving test packets on the network to verify the
ability to communicate.
As shown in Figure 10, the driver provides control of the initialization, interrupt and branch control processes,
supporting both the transmit and the receive functions.
Figure 11 shows an example in flow chart form of a check-out routine written for the Fujitsu MB86967 Controller.
The driver first initializes the control and status registers in the controller for memory and loopback testing.
Loopback and memory testing are conducted simultaneously by transmitting memory test patterns from the
transmit buffer area of memory to the receive buffer area using loopback. This test sequence simultaneously
exercises and tests the transmitter, the receiver and the buffer memory.
The loopback/memory startup test is performed by first loading a test pattern in the form of several packets into
the controller chip’s transmit buffer, then transmitting the packets in loopback mode. The loopback transmission
path through the chip exercises the data link controller as well as the encoder and decoder circuitry, but does
not affect the network.
The MB86967 controller has a unique buffer memory architecture which pipelines packets through the system
in both directions, optimizing data through-put. MB86967’s buffer controller provides all the pointer management
for accessing the buffer automatically, greatly reducing the complexity of the driver and minimizing the software
overhead. Receive packets with errors are automatically purged by MB86967. When a collision occurs, MB86967
automatically re-transmits without host interaction. These features provide high data throughput while minimizing
the host and memory overhead. At the successful conclusion of the tests, the driver starts up the MB86967 chip
for regular service on the network.
Start
Interrupt
Initialization
Interrupt
Service
Request
Exit
Exit
Receive
Read
Transmit
Write
Branch
Control
Newtwork
Software
Transmit
Request
Exit
Figure 10 Software Driver Model
相關(guān)PDF資料
PDF描述
MB86967PFV LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces
MB86977 IP PACKET FORWARDING ENGINE
MB86977PFV-G-BND IP PACKET FORWARDING ENGINE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
MB86977PFV-G-BND 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:IP PACKET FORWARDING ENGINE
MB86A21PMC-G-BNDE1 制造商:FUJITSU 功能描述:
MB86A21PMC-G-JNE1 制造商:FUJITSU 功能描述:
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