5SHY5045L0020模塊,ABB產(chǎn)品重量
VMEbus接口本地外圍總線到VMEbus接口，VMEbus到本地外圍總線接口和本地VMEbus DMA控制器在MVME197LE由VMEchip2提供。VMEchip2還可以提供VMEbus系統(tǒng)控制器起作用。請(qǐng)參閱中的VMEchip2章MVME197LE、MVME197DP和MVME197SP單板計(jì)算機(jī)詳細(xì)編程信息的程序員參考指南。輸入/輸出接口MVME197LE為許多系統(tǒng)應(yīng)用提供板載輸入/輸出。
5SHY5045L0020模塊這個(gè)輸入/輸出功能包括串行端口、打印機(jī)端口、以太網(wǎng)收發(fā)器接口和SCSI大容量存儲(chǔ)接口。
串行端口接口CD2401串行控制器芯片（SCC）用于實(shí)現(xiàn)四個(gè)串行
端口。串行端口支持標(biāo)準(zhǔn)波特率（110至38.4K波特）。串行端口4還支持同步操作模式。由于數(shù)量有限，這四個(gè)串行端口的功能不同輸入/輸出連接器上的引腳數(shù)量。串行端口1是最小功能異步端口。它使用RXD、CT、TXD和RTS。串行端口2和3是全功能異步端口。他們使用RXD、CT、DCD、TXD、RTS和DTR。串行端口4是一個(gè)全功能異步或同步端口。它可以以高達(dá)每秒64k位的同步比特率運(yùn)行。它使用RXD、CT、，DCD、RTS和DTR。它還與同步時(shí)鐘信號(hào)線連接。
請(qǐng)參閱MVME197LE、MVME197DP和MVME197SP單板計(jì)算機(jī)程序員串行端口接口繪圖參考指南連接。所有四個(gè)串行端口使用EIA-232-D驅(qū)動(dòng)器和接收器，位于主端口上所有信號(hào)線都被路由到輸入/輸出連接器。這個(gè)配置頭位于MVME712X轉(zhuǎn)換板上。一應(yīng)使用MVME712X等外部輸入/輸出轉(zhuǎn)換板來(lái)將輸入/輸出連接器引腳轉(zhuǎn)換為行業(yè)標(biāo)準(zhǔn)連接器
VMEbus Interface
The local peripheral bus to VMEbus interface, the VMEbus to local peripheral
bus interface, and the local-VMEbus DMA controller functions on the
MVME197LE are provided by the VMEchip2. The VMEchip2 can also provide
the VMEbus system controller functions. Refer to the VMEchip2 chapter in the
MVME197LE, MVME197DP, and MVME197SP Single Board Computers
Programmer’s Reference Guide for detailed programming information.
I/O Interfaces
The MVME197LE provides onboard I/O for many system applications. The
I/O functions include serial ports, a printer port, an Ethernet transceiver
interface, and a SCSI mass storage interface.
Serial Port Interface
The CD2401 serial controller chip (SCC) is used to implement the four serial
ports. The serial ports support the standard baud rates (110 to 38.4K baud).
Serial port 4 also supports synchronous modes of operation.
The four serial ports are different functionally because of the limited number
of pins on the I/O connector. Serial port 1 is a minimum function
asynchronous port. It uses RXD, CTS, TXD, and RTS. Serial ports 2 and 3 are
full function asynchronous ports. They use RXD, CTS, DCD, TXD, RTS, and
DTR. Serial port 4 is a full function asynchronous or synchronous port. It can operate at synchronous bit rates up to 64k bits per second. It uses RXD, CTS,
DCD, RTS, and DTR. It also interfaces to the synchronous clock signal lines.
Refer to the MVME197LE, MVME197DP, and MVME197SP Single Board
Computers Programmer’s Reference Guide for drawings of the serial port interface
connections.
All four serial ports use EIA-232-D drivers and receivers located on the main
board, and all the signal lines are routed to the I/O connector. The
configuration headers are located on the MVME712X transition board. An
external I/O transition board such as the MVME712X should be used to
convert the I/O connector pinout to industry-standard connectors
