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XIRQ   [4 Articles]

I would like to use the XIRQ interrupt as a power loss detection. I have it connected to Vdd thru an external pull-up resistor. So whenever the power about to go ...

XIRQ going above Vdd but not for programming   [2 Articles]

Hi all, Does anyone know if while the HC11 (the 68HC11E0 in particular) is running in expanded mode, and the XIRQ input(which also happens to be Vpp for the E ...

XIRQ Maximum Voltage   [2 Articles]

I am migrating from the MC68HC811E2 to MC68HC711E9. I am looking for the maximum voltage the the MC68HC811E2 can handle. Can I apply 12v to the XIRQ of the MC68HC81...

HC11 IRQ AND XIRQ PIN 40 AND 41   [3 Articles]

I WAS WANTING TO KNOW IF IM UNDERSTANDING THE OPERATION OF THE IRQ PIN41 ON THE HC11. FROM WHAT I HAVE READ THE PIN IS USED TO SEND A INTERRUPT REQUEST TO THE HC1...

Re: HC711 pinout

Mike Phillips wrote: > Mike, > > Am I SOL? I'm afraid that you are. I found this document http://www.ortodoxism.ro/datasheets/motorola/MC68HC11KTS.pdf which, if you loo...

Re: New Mask for MC68HC711E9CFN2 ?   [3 Articles]

Walter: There was a thread a number of months ago concerning problems programming the 68HC711E9. It turned out that chips were being destroyed by excess curren...

PCBUG11 fails Communication   [4 Articles]

Hi to all, I'm using PCBUG11 to program a 68HC11A1P. But the program fails to communicate with the chip. I tried connecting XIRQ to Rx, with PCbug11....

The connection of MAX232   [2 Articles]

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 version of schematics from the in...

Re: Trace command buffalo   [2 Articles]

Buffalo v3.4 says this for tracing to work correctly: Externally, the OC5 pin must be wired to the XIRQ pin. Is your hardware setup for this? ----- Or...

What exactly happens when recovering from STOP Mode?   [9 Articles]

Hi all, Who knows what exactly happens when a HC11 recovers from the STOP Mode? According to the docs the HC11 resumes normal operation after a low level pulse o...

4K81H mask won't program   [4 Articles]

Hi, The new 68HC711 mask 4K81H exhibits programming problems on our equipment, which seem similar to the problems with the 2H50W mask. I know a solution has...

RE: Processor lock-up

Musibau: Another item to look for is uninitialized interrupt vectors. I have seen noise trigger an IRQ or XIRQ, even with pullups. Make sure that all unused ...

Re: Reset program   [2 Articles]

----- Original Message ----- From: "nimish_sudan" <> To: <> > Hey guys, another question here. This one might be kind of tricky > because I've looked arou...

Re: Need debugging techniques on ADC to LCD   [4 Articles]

Hi Just a thought check out any unused interrupts eg. XIRQ etc. If the pin is not pulled hi the CMOS input might drift around and eventually cause an interrupt ...

Can't get Buffalo to run

Hi to all: Here's what I have happening: I boot my PC in the dos mode, using a utility "Moslo" to slow the PC down to XT speed. I run PCBUG11A on CO...

Re: Re: Microcore11 EEPROM programming problem   [3 Articles]

In a message dated 8/31/04 11:05:20 A.M. Eastern Daylight Time, writes: Yes, that is correct. I should have been more specific. The EEPROM is external, ...

ICC11 and Interrupt Vectors   [3 Articles]

Hi. When I compile my program, I am receiving this error: "!E vectors.o(9): multiple define: '_interrupt_vectors'" My project contains my main C program and a...

Re: buffalo isr problem

Brian Traffis wrote: > Mike, > > First off, should I be responding to the yahoo group for the benefit of all on this subject? As > you know I am new here so I am not s...

Re: reset problem   [3 Articles]

I believe that the POR (power-on-reset) is the only reset guaranteed to always give you the same results unless you follow some rules: The most common things I c...

RE: software configure of PSD8xx

I see your point.. while there is no non-volatile register that could be used as a PT, you could minimize this runaway risk, depending on how your memory map is set...

Re: mc 68hc11a1p   [2 Articles]

ed_idlan wrote: > hi.. > > I'm idlan. I'm a new person in this group. I would like to know about Welcome! Glad to have you aboard! > mc 68hc11a1p. Please tell me where can I...

RE: RE: Processor lock-up

Thanks Darrell, your comment is also a strong possibility as to the source of my problem. Out of the 20-interrupt vectors we are only using seven and the rest are u...

Re: help   [2 Articles]

plz help people i am copyingmy program here, which shows error "multiple define:__interrupt_vector " my vector table is as follows: extern void int_handler( void); ...

Re: MODA problems...again

Hmmm, buy your chips and sockets, or sell my board eh?? Sounds like an interesting offer. > Tellya what. I've got chips and sockets both. Make me an offer. The > chips I ha...

Re: Interfacing MC68HC11F1 with external SRAM   [3 Articles]

Oh, one last thing I forgot to mention regarding the 'F1 and external memory - I have recently created a schematic for a 'F1 expanded mode evaluation board that I...

Re: RE: Processor lock-up

hi Musibau, I think doing nothing inside the brackets is endless loop. himanshu wrote: > Thanks Darrell, your comment is also a strong possibility as to ...

Re: RE: Processor lock-up

Hi Musibau, No , thats not endless loop! What am i thinking? Nevermind that answer. himanshu wrote: > Thanks Darrell, your comment is also a strong ...

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...

RE: RE: Processor lock-up

Are you Darrell ? -----Original Message----- From: Himanshu Trivedi [mailto:] Sent: Thursday, October 10, 2002 12:21 PM To: Subject: Re: [m68HC11] RE: Pro...

Re: RE: Processor lock-up

You cannot assume that. I would try something like: for(;;) ; Regards, Roberto Guillermo Berner Boolean General ICQ 119529928 54 11 4308 3...

Re: RE: Processor lock-up

Dear Musibau, I would first test the CPU board with a very simple program, not the one you are using right now, just to check if this is a hardware or a software...

Re: RE: Processor lock-up

Hmm, I would think you could. Nothing inside the brackets would make the thing do nothing, then return from that interrupt. It'd be like having a "return;" statement in...

RE: RE: Processor lock-up

I think you're right chris. Having nothing inside the bracket will be like NOP. Thanks Musibau -----Original Message----- From: Christopher Darilek [mai...

Re: RE: Processor lock-up

Dear Friends, Excuse me, Probably I don't understand this conversation but I just want to say that return is the only thing you can expect from empty brackets. N...

HC11 Register Definition include file

A note to Nimish, and others who may be interested: If you choose to use Tony P.'s ASM11 - which I would personally recommend over Motorola's dated AS11 - yo...

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...