ADC1000-USB A/D Converter: Serial Port Interface Communications and Control Information

The ADC1000-USB A/D Converter is a microcontroller-based A/D card that can communicate via the Universal Serial Bus (RS-232). This document contains the necessary command information for controlling the unit via RS-232 interface. For driver-level USB control information, refer to the OOIWinIP Windows Interface Package. The ADC1000-USB utilizes a Cypress AN2131 microcontroller, which has a high speed 8051, combined with a USB ASIC. Program code and data coefficients are stored in external E²PROM and are loaded at boot-up via the I²C bus. The microcontroller has 8K of internal SRAM and 128K of external SRAM. Due to memory mapping and paging constraints, only 96K of the external SRAM is useable. The list of commands and the microcode version number used when each was introduced are show in the table on the following page. All commands consist of an ADCII character passed over the serial port, followed by some data. The length of the data depends on the command.