Todd Peterson wrote: > > At 03:29 PM 4/14/97 +0200, you wrote: > > >On the PIC16C84, does anybody knows if porta.4 needs a pull-up > >resistor, because I can't use this anymore as output, it remains at 0v. > > Yes, this port is open-drain, and needs a pull-up resistor. Check out page > 9 of the '84 manual. Also, this pin has a Schmitt trigger when used as an > input; the others in port a are TTL type (no hysteresis). > > -Todd > > .--------------------------------------------------------------. > / .-. E-Lab Digital Engineering, Inc. .-. \ > | / \ Embedded Control & Integrated Circuit Solutions / \ | > | \_. | | / | > |\ | /| http://www.netins.net/showcase/elab |\ | /| > | `---' | | `---' | > | | NEW: EDE700 Serial LCD Screen Driver | | > | | & EDE1400 Serial to Parallel-Printer Driver | | > | | (712) 944-5344 FAX:(712) 944-5501 | | > | |--------------------------------------------------| | > \ / \_____/ > `---' -- Thanks a lot, I was wordering if my PIC is out.... didn't read the specs long enough. _____________ \ / David BALDWIN \ ALCATEL / Design engineer \TELECOM/ \ / SdM (Societe de Microelectronique) \ / \ / B.P. 4205 Phone : +32 (0)71 442932 V B-6000 Charleroi Fax : +32 (0)71 442905 (Belgium) mailto:baldwin@etca.alcatel.be