Try clearing all memory locations at startup.

Joe

At 14:05 09/06/99 +1000, you wrote:
>I've connected the two Vss pins together and the two Vdd pins. Still got
>the same problem. Something weird though....
>
>When I touch the top of the 16C74JW the LED lights up. The LED is active
>low. ie: connected between RB0 and +5V with 220ohm R. Should this happen??
>It seems strange to me.
>
>Thanks
>
>Stewart Pye
>
>At 11:17 PM 8/06/99 -0400, you wrote:
>>Stewart:
>>
>>You realy must connect those pins together and to supply.  I accidentally
>left
>>one of the VS's off on a '73 once, and the A/D didn't work right at all.  A
>>cursory check with a meter saw that pin at ground, or so one would think
on a
>>quick glance.  Turns out that a few tens of mV will whack the A/D.  Connect
>>them through and to supply, with bypass.
>>
>>Try a small hello world by killing the watchdog, interrupts, and all
>>unnecessary calls.  Start small and work up!  You might just read TMR0 and
>>stuff it onto port C for the fun of it.. Scope should go nuts.  Don't forget
>>that the portA is set for analog function by default.  Ref ADCON0/1.  And
>that
>>RA4 is an open collector all the time.  If you were looking for
excitement on
>>one of these RA pins, you could have the wool over your eyes.
>>
>>Stewart Pye wrote:
>>
>>> Hi...
>>>
>>> I'm testing a project that uses a 16C74A. I've used the 16F84 quite a bit
>>> but this is my first try using the 16C74 with a HS osc at 16Mhz.
>>>
>>> Problem:
>>> I cant even get an led to flash. I know the code is correct. I set the osc
>>> to HS.
>>>
>>> Question:
>>> Are the two VDD and VSS pins connected internally???
>>> I got 12ohms between the 2 Vss pins but several Mohms between the Vdd
pins.
>>> Is this correct??
>>> Should I connect these pins externally???
>>> Is there something else that could be causing the problem?
>>>
>>> Any help would be much appreciated. (the frustration's building)
>>>
>>> Thanks,
>>> Stewart Pye
>>
>
>