Heips,

I am using a PIC16F877 and am stuck with a strange problem, which I hope is
due to a mistake on my part rather than a broken PIC.

Summary:

        bsf   STATUS, RP0       ; Use register bank number 1

        movlw b'10000110'       ; Set port A as digital I/O
        movwf ADCON1            ;  instead of ADC

        movlw b'00000000'       ; All pins set to output
        movwf TRISA             ;  on port A

        movlw   H'FF'           ; Assert all pins
        movwf PORTA             ; on port A

I upload it to the chip using a bootloader and serial connection, and reset
the circuit.

All pins on port A now measure 5.00 volts between them and GND, EXCEPT for
pin 4 (RA4/T0CKL), which measures something between 0.8 and 3.3 volts.

Usually I would blame this on a connection problem somewhere, but now I am
using a breadboard and the pin in question is not connected to anything
(neither are the other port A pins).

Maybe it has something to do with the timer associated with that pin? I have
tried some different configurations, and each one got a different voltage,
but never the normal +5V.

What do I need to do (starting with the default startup configuration) in
this case, using the PIC16F877 @ 4 MHz with a crystal oscillator using the
following config word:
_CP_OFF
_WDT_OFF
_BODEN_ON
_PWRTE_ON
_XT_OSC
_WRT_ENABLE_ON
_LVP_OFF
_DEBUG_OFF
_CPD_OFF

Hope the chip is ok :-)
Thanks for any pointers,
Kinds regards
Dennis Noordsij

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