Abstract
The analog-to-digital converter module is one of the key interfaces to the “real” world. The PIC32MX family was designed with embedded-control applications in mind and therefore is ideally prepared to deal with the analog nature of this world. The first step in using the ADC, like any other peripheral module inside the PIC32, is to familiarize with the module building blocks and the key control registers. The conversion phase timing depends on the selected ADC clock source. In the AD1CON2 register a new autocalibration mode has been added to reduce the ADC offset. The OFFCAL control bit has been added to enter the calibration mode. The AD1CHS register control bits are now in the upper half of the register 32-bit word. There is also a single CH0NB0 control bit for the selection of the negative input of the second input multiplexer.
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