Hello,

    while we're "on the subject" I want to say that I've used 6 I/O pins (4
on PORTB and the 2 XTAL pins) on a PIC16F628 to light 8 LEDs.

    I've multiplexed the 8 LEDS with 4 470R resistor on the 6 pins without
burning anything. When all LEDs (PORTB pins to resistors to anodes) are on,
I have (5-1.7)/470=7.021mA on each PORTB pin and 7.021x4=28.09mA on each
XTAL pin (RA6, RA7). As RA6 and RA7 are on for 50% of the time, it does have
sufficient time to recover from the high current.

    No damaged pin untill now.

    Best regards,

    Brusque

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Edson Brusque                 C.I.Tronics Lighting Designers Ltda
Researcher and Developer               Blumenau  -  SC  -  Brazil
Say NO to HTML mail                          www.citronics.com.br
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