Part Number: MSP430G2553
Hi,
i found this in a closed thread:
"On devices with SBW, the capacitor at the reset pin is limited to 2.2nF (including wire and trace capacitance). This is because the reset pin is also a clock pin for the SBW singal (some MHz).
If VCC can be slowly rising, this isn't enough to keep the MSP in reset while VCC is still rising. To us a larger capacitor (for a larger Tau), put 100nF (or even more) to VSS and 10K to VCC, but put an additional 1k resistor between the two and the RST pin. This is sufficient to separate the high-frequency SBW signal from the large capacitor while still providing a long low-level during VCC rise.
If the part has a separate AVCC/AVSS, a separate 10µ Tantalum/100nF ceramic combo is recommended between the two, while separating AVCC from DVCC by a 10-100Ohms resistor, and routing AVSS separately form DVSS to the supply GND point. Internally, the analog and digital supply voltages may differ by up to 0.2V, so the separate GND trace will be free of current-induced digital gnd ripples while the R/C filter eliminates ripples on the DVCC-DVSS voltage. THis gives way better analog results.
If the analog circuitry isn't used, then AVCC/AVSS shoudl be connected to DVCC/DVSS directly.
For DVCC, an electrolytic capacitor of 10 or 47µF is sufficient (doesn't need to be tantalum). And a 100nF ceramic one.
And on 5x family devices and newer, a separate external 470nF capacitor (ideally a good ceramic one, for lowest losses) to GND must be added (for the internal core voltage regulator). See the data sheet."
Do i need all of that to use my G2553 standalone with analogpins in use?
Greetz
