It appears that the MSP430F133 hardware may be in violation of the PUC/POR conditions stated in the device datasheet. VCC rise time must be greater than +1 V/ms and likewise the fall time should be greater than -1 V/ms. Failure to do so could keep the device in a POR state which can only be corrected by driving the VCC voltage below 200 mV. Please follow the passive component recommendations for device pins, including 10 uF + 100 nF capacitors to GND on all VCC lines and a 47 kOhm pull-up resistor and 2.2 pF pull-down capacitor on the RST line. You can use the MSP-TS430PM64 schematic as a reference, included in the MSP430 Hardware Tools User's Guide (SLAU278): www.ti.com/.../slau278y.pdf Regards, Ryan
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