5X00063G01模擬量輸出模塊，EMERSON配置教程
串行連接MVME172LX使用兩個Zilog Z85230串行端口控制器來實現(xiàn)四個串行通信接口。每個接口支持CT、DCD、RTS和DTR控制信號以及TXD和RXD發(fā)送/接收數(shù)據(jù)信號。因為串行時鐘是
在MVME172LX實現(xiàn)中省略了串行通信嚴格異步。Z85230作為DTE（數(shù)據(jù)終端）接口設(shè)備）具有EIA-232-D信號電平。串行端口路由到前面板上有四個RJ-45連接器。
5X00063G01模擬量輸出模塊有關(guān)EIA-232-D接口的更多信息，請參閱EIA232-D標準。MVME172LX上四個串行端口的連接圖如下所示
如下圖所示。這些端口連接到外部設(shè)備通過連接到前面板的電纜。介紹本章提供了有關(guān)MVME172LX通電的信息VME嵌入式控制器安裝在系統(tǒng)中后，并描述了交換機、狀態(tài)指示器和輸入/輸出端口的功能。有關(guān)編程信息，請參閱MVME172嵌入式控制器程序員參考指南。前面板開關(guān)和指示燈有兩個開關(guān)（中止和重置）和四個LED（發(fā)光二極管）狀態(tài)指示器（故障、運行、SCON和保險絲）位于MVME172LX前面板。向處理器發(fā)送中斷信號。中斷正常用于中止程序執(zhí)行并將控制返回給調(diào)試器固件位于MVME172LX閃存中。連接到ABT開關(guān)的斷路器是邊緣敏感型電路，過濾以消除開關(guān)反彈。重置開關(guān)（Reset）重置所有車載設(shè)備。如果MVME172LX是系統(tǒng)控制器。SYSRESET*信號可能是由復(fù)位開關(guān)、通電復(fù)位、看門狗超時、，或通過VMEchip2專用集成電路。有關(guān)更多詳細信息，請參閱第4章，功能描述Serial Connections
The MVME172LX uses two Zilog Z85230 serial port controllers to
implement the four serial communications interfaces. Each interface
supports CTS, DCD, RTS, and DTR control signals as well as the TXD
and RXD transmit/receive data signals. Because the serial clocks are
omitted in the MVME172LX implementation, serial communications are
strictly asynchronous. The Z85230 is interfaced as DTE (data terminal
equipment) with EIA-232-D signal levels. The serial ports are routed to
four RJ-45 connectors on the front panel.
For additional information on the EIA-232-D interface, refer to the EIA232-D Standard.
Connection diagrams for the four serial ports on the MVME172LX are
provided in the following figures. These ports are connected to external
devices through cables connected to the front panel.Introduction
This chapter provides information on powering up the MVME172LX
VME Embedded Controller after its installation in a system, and describes
the functionality of the switches, status indicators, and I/O ports.
For programming information, consult the MVME172 Embedded
Controller Programmer’s Reference Guide.
Front Panel Switches and Indicators
There are two switches (ABORT and RESET) and four LED (light-emitting
diode) status indicators (FAIL, RUN, SCON and FUSES) located on the
MVME172LX front panel. Sends an interrupt signal to the processor. The interrupt is normally
used to abort program execution and return control to the debugger
firmware located in the MVME172LX Flash memory.
The interrupter connected to the ABT switch is an edge-sensitive
circuit, filtered to remove switch bounce.
Reset Switch (RESET) Resets all onboard devices. Also drives a SYSRESET* signal if the
MVME172LX is system controller. SYSRESET* signals may be
generated by the Reset switch, a power-up reset, a watchdog timeout,
or by a control bit in the Local Control/Status Register (LCSR) in the
VMEchip2 ASIC. For further details, refer to Chapter 4, Functional
Description.
