Update README.md

Author: deklaus

PIC-ValveControl/README.md

@@ -50,7 +50,7 @@ Process commands and queries (?) from ESP:
 Configures the Vectored Interrupt Manager and contains the corresponding 
 interrupt service routines (ISR).
   - PWM1 Parameter Interrupt
-    - on falling edge of PWM1_SaP2_out (2 ms after H-bridge ON): read motor current
+    - on falling edge of PWM1_S1P2_out (2 ms after H-bridge ON): read motor current
   - PWM2 Parameter Interrupt
     - on falling edge of PWM2_S1P2_out (~ 400 µs after H-bridge OFF): read Back EMF
   - TMR0 (1 ms system clock)