Programming
Register Mapping
Communication is carried out through 16 block control, status, data, and identification registers mapped to the A16 short I/O space or standard A24 data space, including board identification registers (BIR), control/status registers (CSR), output data registers (ODR), etc.
Board Identification Register (BIR): Contains the identification code (22 million hexadecimal) of the VMIVME-4150 board, located in the first two words of the board base address, and is read-only.
Control/Status Register (CSR): Provides control and monitoring of board functions, including output enable, output load cycle status, data encoding, self-test LED, etc. Each bit has specific functions.
Output Data Register (ODR): Each of the 12 analog outputs has a dedicated 12 bit output data register that supports read and write operations. The data is transmitted to the output D/A converter in a serial manner.
Reset operation
The system reset operation will reset all read and write registers to zero, causing the board to be in a specific state, such as analog output level, status, data encoding, and front-end panel LED status, all of which will change accordingly.
Analog output control
The output register and data format are controlled by CSR bit D12 and can be in offset binary format or binary complement format. The output range is determined by the jumper on the board, and the voltage output can be controlled by the bit in CSR to determine the connection status with the output connector. The data is transmitted from the output data register to the output D/A converter through an internal output load cycle, during which there is a corresponding busy flag indication.
maintenance
Provided information on product maintenance and upkeep, such as checking system power, software, configuration, connections, etc. in case of product malfunction. We do not recommend user level repairs. If you need to return the item, please contact VMIC to obtain a Return Merchandise Authorization (RMA) number. The drawings and tables in the manual are for reference only.
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