RELIANCE 45C200A Analog quantity sequence module

The terminal is set up as follows: – Eight bits per character – One stop bit per character – Parity disabled (no parity protection) – Baud rate 9600 baud (the default baud rate of many serial ports at power-up) 5. Any other device that you wish to use, such as a host computer system and/or peripheral equipment, is cabled to the appropriate connectors. After you complete the checks listed above, you are ready to power up the system.

The bit values are read as a 0 when the corresponding jumper is installed, or as a 1 when the jumper is removed. The default configuration for J21 on the MVME172LX has seven jumpers installed (no jumper between pins 9-10). The 172Bug firmware reserves/defines the four lower order bits (GPI3 to GPI0). Table 2-2 describes the bit assignments on J21.

Bringing up the Board 

The MVME172LX comes with 172Bug firmware installed. For the firmware to operate properly with the board, you must follow the steps below. ! Caution Inserting or removing boards with power applied may damage board components. 1. Turn all equipment power OFF. Refer to MVME172LX Configuration on page 1-4 and configure jumpers on headers as necessary for your particular application. a. The jumper block for header J21 contains eight bits, which all affect 172Bug operation. They are read as a register (at location $FFF4202D) on the MC2chip ASIC. (The MVME172 VME Embedded Controller Programmer’s Reference Guide contains additional information on the MC2chip.)

Software-Readable Jumpers

When set to 1 (high), this bit instructs the debugger to use the default setup/operation parameters in ROM instead of the user setup/operation parameters in Non-Volatile RAM (NVRAM). The effect is the same as pressing the RESET and ABORT switches simultaneously. This feature can be helpful in the event the user setup is corrupted or does not meet a sanity check. Refer to the ENV command description for the Flash/ROM defaults.When set to 0 (low), this bit informs the debugger that it is executing out of Flash memory. When set to 1 (high), it informs the debugger that it is executing out of the PROM.

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