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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)   [2 Articles]

reganumah wrote: > heloo, > when ever i try to program the reset vector for example below > > org $fffe > fdb $b600 > > an error is show. i'm using jbug11 , mc68...

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...

Re: How can I connect PC to HC11 through RS232?

You just can't connect directly to the PC from the HC11. You need to go thru the RS232. You also need a pull up resistor for the TxD pin of the HC11. What I usua...

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   [2 Articles]

--- In , "John" wrote: > Mark, > > Just a another (more elegant) thought to work on- > > Can you make the Tx/Rx booting loop with the highe...

RXD TXD   [7 Articles]

I'm trying to use PORTS (from the hc12) as a general i/o register. I can get PS2-PS7 to work, but PS0 and PS1 are not because they are RXD and TXD respectively. I...

LCD confusion

Hi we are trying to modify this code (given to us by the company) so that we can take a value from the A/D and ouput it to the LCD screen. This seems simple enoug...

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...

Re: Software serial communication

In a message dated 6/25/02 11:42:28 AM Eastern Daylight Time, b...@swipnet.se writes: I need two serial communication ports from my 68hc11. Is it anyone w...