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Seen that appnote and did not find new info compared to the datasheet.
But thanks anyway

Yeah I prefered the 17's but i could not grab that chip at my local store so gone for the 16. I will try without the cap. Thanks for that tip

I'm now managing to do it with the philips component,...

Hi melanie,
the mcp is on portc.3 and 4 for SDA SCL, and thats it. All vss & vdd's are connected and address pins are all grounded.
I've seen those code samples and I inpired my code from them, but...

i got the code working by stripping the reg value and using a PCF8574 which has no clock circuit, and it worked directly, this lead me to re-analize the clock on the test pin of the MCP and i got a...

Hi, i'm trying to get this IO expander chip to work with a 18F8720(have others in stock and same results), I wired the clock and i'm able to measure it at the TestPin of the MCP and i get a 1Mhz...

Came back home and done it over again, played a bit with the config bits and it started to blink with and without adcon, one config bit i have removed was LVP .... that should not interfere...

This pic is on a card with an osc onboard of 6mhz supposed to be ran on 24mhz thanks to hsppl.

Here is a pdf of the card, (it's in thai) but the last 2 pages are the wiring diagrams.
...

my mistake in the code i typed over, i tried with pins on almost every port.
B, H, A with the same result always. Not blinking. Therefore i have doubts over the device, how can i troubleshoot this...

Thanks for the reply i will give it a try when going home,
i know adcon can give unexpected behavior sometimes, but i did'nt know it can simply avoid you pic to run a simple blink led.

High i try to start a basic blinking led, on a 18f8720, but no success, anyone knows config bits i should set to make this chip works ?

My code looks something like this.

main:
HIGH PORTA.1...

I never heard about the HSPPL, this explains why this card is delivered with 6 mhz crystal the lower model got a 10, i did'nt understood why a much better pic got a lower crystal. Now I got it 24mhz...

Hi,

I've aquired a card with a pic 18f8720 on it, so far so good.
The model is supported etc, but that card has a 6Mhz crystal.
And when i consult the PBP manual i see that supported...