Tom=E1s =D3 h=C9ilidhe wrote:
> I'll have a 40-pin Dual In-line Package PIC16F887 on my board, and I =

> want to be able to both program and debug it while it's in its circuit.
> =

> On my board, the Vss pin of the 887 will be hardwired to 5 V... but will =

> I need this to be a higher voltage for programming it?
> =

> I'm reading through the datasheet right now, but could someone please =

> help me out? Basically I want to know which pins I should connect to a =

> header so that I can hook up my Pickit2 to the board to program and =

> debug it.

Programming details are in the "programming specification", not in the =

datasaheet. Check whether the part (might) need a Vpp-before-Vdd =

sequence. If so, the programmer must be able to switch the Vdd. If not, =

Vdd hardwired to 5V is OK.

And take care that
- PGM is pulled low on startup
- the programmer must be able to pull RB6/RB7 low with its build-in =

resistors (so no heavy loads towards Vdd on those pins)

-- =


Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

-- =

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