Blinky on Lab-X1 twice as fast on 16F877 as on a 18F4550

[mpgmike]

Test 2, set all ports on 16F877 as output:

TRISA = 000000
TRISB = 000000
TRISC = 000000
TRISD = 000000
TRISE = 000000

PORTA = 000000
PORTB = 000000
PORTC = 000000
PORTD = 000000
PORTE = 000000

No difference, still blinking at twice the expected rate...


Robert

Don't you have to make one of the External Oscillator pins an Input in the TRISx Register? I'm on the road and can't look at the Data Sheet.

[tumbleweed]

On those old chips like the 16F877, OSC1 and OSC2 aren't part of PORTA.

[Demon]

Don't you have to make one of the External Oscillator pins an Input in the TRISx Register? I'm on the road and can't look at the Data Sheet.

Pretty sure I saw that on USART pins.

Robert