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Unformatted text preview: How to Use the MSP430 Analog to Digital Converters... The MSP430F2274 process has a high-performance 10-bit analog-to-digital converter. (See slau144e - MSP430x2xx Family User's Guide.pdf .) ADC10 features include: Greater than 200 ksps maximum conversion rate Conversion initiation by software or Timer_A Twelve external input channels Conversion channels for internal temperature sensor, VCC, and external references Selectable conversion clock source The input channel is selected by setting bits 15-12 in the ADC10 Control Register 1 (ADC10CTL1) as follows: 0000 A0 0001 A1 0010 A2 0011 A3 0100 A4 0101 A5 0110 A6 0111 A7 1000 VeREF+ 1001 VREF?/VeREF? 1010 Temperature sensor 1011 (VCC VSS) / 2 1100 (VCC VSS) / 2, A12, Left potentiometer 1101 (VCC VSS) / 2, A13, Right potentiometer (when Jumper A is left) 1110 (VCC VSS) / 2, A14, Servo #2 signal (when Jumper B is right) 1111 (VCC VSS) / 2, A15, eZ430X external thermistor (when Jumper C is...
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This document was uploaded on 02/08/2012.
- Winter '09