Originally posted by toreto
which of this two is conected to the resitor?
PGD = 7
PGC = 6
thanks for your answer
Both are connected through 4.7k resistors, as well as the vpp through a 4.7k resistor.


GP0 = GPD = 7
GP1 = GPC = 6

So in your case you would connect the 12Cxxx chip like this:

D-Conn............................uPIC
TXD (3) ------[4.7k]-------VPP(pin 4)

GND (5) --------------------VSS(pin 8)

DTR (4) -------[4.7k]------DATA(pin 7)

CTS (8) ------------------DATA(pin 7)

RTS (7) -------[4.7k]------CLK(pin 6)

5 volts DC to VDD(pin1)

Hope this helps.
J