hello!
I have a dsp system in my circuit
When I check whether tms320c6713's core supply voltage(CVDD) pin is short to GND with multimeter, I find that the equivalent resistor between them is just 39 ohm or 42 ohm. I have just solder DSP and the power manager TPS54312.
So small a resister between core supply voltage pin and GND, is it correct?
Re: So small a resistor between core supply voltage pin and
Measuring Vcc/Vdd against GND with a multimiter can produce some "funny" readings ..
At this stage I wouldn't worry about these figures ..
Different story would be if you read resitances close to 0Ω or infinity (nothing at all).
If you have tantalum/electolytic capacitors in this circuit double-check their polarities ..
104mA may be normal. Refer to the data sheets of all your chips to find their typical current in "standby" state, or whatever state you are running them right now. Don't forget to include terminator resistors or other passive devices that eat power. Add up the numbers to see if it's close to 104mA.