Can i use pin signed as S1 and S2 (current and Temperature sense) like a simple digital IO? I've a VNH3SP3D based H-Bridge and i need 3 pin for direction and pwm output...
which pins is connected to S1 and S2 pin? (pwm1 and 2)
THX sorry for my bad engish
Congratulation for your english. If you like you can even write in italian language. We are able to understand it. But if we want to make this comment useful for everyone we can continue it in english.
The S1 pin (current sense) for both PWM sockets is connected to the operational amplifier input in order to amplify the voltage from the Rsense on the H-bridge, therefore it cannot be used as a generic I/O pin. Both op-amps outputs are connected to the AN0 e AN1. So, without heavy and dangerous PCB modifications (i.e. manually cutting tracks) they cannot be used for other purposes.
The S2 pins are connected, via the JP1 and JP2 jumpers, to the PGC, PGD pins, usually used to program dsPIC. To use them you must remember to open the jumpers while programming/debugging and to close them in normal operation.
You must also remember to open the jump pads TS1 and TS1 on the PCB as explained in:
There is an RC low-pass filter on that input for thermal use. Cutting the jump pads the capacitors are isolated but still remain a 2.2KOhm resistor in series to the RP0, RP1 pins.