i'm using a MSP430F1232 in a battery powered enviroment. In LPM4 the complete circuit normally draws about 2uA, but if i apply about vdd/2 to the analog input (i'm using P2.1/INCLK/A1) the current consumption raises to about 9uA. The current strongly depends from the applied voltage (0V ~ 2uA, 0.7V ~ 2uA, 1.5V ~9.5uA).
my configuation: -P2.1 is GP digital input and AE is set for A1 -ADC and Ref. (int. 2.5V) both are off -A1 is routed through the input mux as i read in some docs the digital I/O circuit should be disconnected if AE is set - but if i change P2.1 to a digital output, current consumption will be about 30uA... so i think there is something strange... did i something wrong ? any ideas ? thanks for any suggestions, matthias
