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Port A ...all pins as outputs?   [2 Articles]

Hi... I'm disassembling some code in a device i don't have physical access to... and the program (which does work) is appearing to use all eight pins of Port A as both outputs...

RE: Buffalo Monitor & RS-232 code

Mike, Thanks for the encouragement to do more "digging". I now know the RS232 interface is made with the SP232A. (I did not realize there are Rxd and Txd pins on the 68HC11. I d...

Re: regarding mc68hc11e9   [3 Articles]

Tony Papadimitriou wrote: > > MODA/MODB control the startup mode, one of these four: > > 1. SPECIAL BOOTSTAP (single) > 2. SPECIAL TEST (expanded) > 3. SINGLE-CHIP (i...

Re: programming the reset vector (FFFE)

reganumah wrote: > hello, thanks mike and sorry for the lack of information. the > motorola chip i am using is the mc68hc11E1. wat i intend to do is run a > program at $...

Re: The connection of MAX232   [2 Articles]

circuitcyco wrote: > Hello, can anyone here give me some information on the connection of > host PC to MCU? I used MAX232 for voltage level conversion.I got few > versio...

help with pcbug11   [3 Articles]

Im pretty new to all this and so far have only been using Buffalo. Had a 5 min crash course on pcbug11 and b'strap mode of MC68HC11E9 which will be examined on tom...

Re: My latest project: HC11 slave I/O controller

--- In , "John" wrote: > I don't know enough about "multidrop" operation to comment, except > to wonder if somehow "disconnecting" active SCI I/...

Re: sci communication with 68hc11e1

Processing NMEA 0183 sentences is quite simple. This is an excerpt from the NMEA faq: --------- Under the NMEA-0183 standard, all characters used are printa...

Re: RXD TXD   [6 Articles]

Sorry if this is the obvious answer you've already tried.... You should be able to disable the SCI subsystem by clearing the TE and RE bits in the SCCR2 control ...

Re: Comport parameters

In a message dated 10/28/02 5:05:18 PM Eastern Standard Time, writes: > If I understand correctly ,you are essentially talkign about measuring bit > times ?H...

Re: Reset   [2 Articles]

Yes I build my own hardware on a testing board. My circuit work for a while but now I have a problem that I can't find. My reset circuit is done with a DS1233; 1...

Reset

Hi Hugues, On Thu, 19 Sep 2002 19:16:33 -0400, you wrote: >My question is : What could I test to know if my 68hc11 is reset good and ready for receiving the p...