According to ALL the Microchip ICSP schematics: 1) VPP connects direct to MLCR pin. no resistors or diodes.
2) VPP/MCLR is connected to rest of circuits (reset buttons, VDD, R &C reset time constant, what ever you want) via a diode (to block VPP > VDD) OR a resistor (to limit VPP to VDD current) AND ALSO the resistor OR diode means the capacitor is NOT directly connected to MCLR/VPP, to avoid damp rise time of VPP too much. Basic principle. 1) Vpp pin connects DIRECT to MCLR pin 2) have what you like for reset circuit, but either a diode or resistor or something to limit OR block VPP -> VDD current flow and ensure rise time of VPP is not compromised. so on your schematic dump the series diode on VPP. disconnect MCLR from everything and connect it direct to VPP and other end of the 1K ohm resistor. Then the circuit meets Microchip specs. See help file of pickit 2 in MPLAB readmes, or Pickit 2 or 3 user manual under ICSP. -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
