27c256 | 4K81H | 68HC11A1 | 68HC11P1 | 68hc24 | 68HC711E9 | 68HC811 | 8255 | A2D | ADC | ADC12138 | Am85C30 | BRCLR | Buffalo | CMOS | EEPROM | EPROM | Ethernet | EVB | EVBU | HC11E1 | HC11E9 | HC711E9 | Horray | ImageCraft | IRQ | Keypad | LCD | MC68HC11D0FN | MC68HC11E1CFU3 | MC68HC11F1 | MC68HC711E9 | MC68HC711E9CFN2 | Microcore11 | Microstamp11 | Minikit | NVRAM | PSD | PSD8xx | PSD9xx | PT1000 | RS232 | RTS | RXD | SPI | SRAM | TXD | Watchdogs | XIRQ

Interfacing with CMOS IC   [7 Articles]

I want to interface the 6811 ports directly to CMOS IC's. Is it OK to do that and does it cause any problems? ...

Re: Re: Motorola naming conventions   [2 Articles]

At 12:31 AM 9/13/2004 +0000, you wrote: >--- In , "Daniel L Newhouse" > wrote: > > Does anyone know a resource for the naming conventions Mo...

Re: Basic electronics question

At 2002-06-03 15:15 -0500, Technical Operations wrote: >Question: >Will there be a problem with me substituting '74LS' >parts for a circuit that uses '74HCT' > ...

Re: My latest project: HC11 slave I/O controller   [2 Articles]

An NE7555 cmos timer (8-bit DIP) set up as a one-shot is my immediate thought. Am I right in assuming that you cannot accommodate a DIP device? Have you co...

Re: Port C

Make sure you have a pulldown resistor tied to all input ports. I use a 4.7K from the pin to ground. Without these, even a very short piece of wire can act like an ...

Re: Need debugging techniques on ADC to LCD

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 ...

Re: Excited about an RF data link

Also check out: Linx at http://www.linxtechnologies.com/ you can get it at Digikey...they have a litttle monolithic device at 415MHz. Also, for more ra...

Re: HC11   [2 Articles]

On Mon, 18 Aug 2003 wrote: > In a message dated 8/18/03 7:25:05 PM Eastern Daylight Time, > writes: > >I hate to be pedantic, and I am probably showing how ...

Re: High speed switch   [2 Articles]

Paul, the second line of the description reads: "These devices feature low input current making them CMOS/LSTTL logic compatible, input hysteresis for fast ou...

Re: Interfacing the HC11 with a disk drive and real time clock??

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Re: Student Need Help   [2 Articles]

Hi Indran --- indran19 <> wrote: (snipped) > > > 1)The Circuit: > Bob Gardner has replied. > 2)Memory: > i have intended to use 64 Kb EPROM o...

RE: MC68HC11 Digital Input High Voltage Minimum

In my opinion, you're in a gray area here. If you ask Motorola for an official opinion they'll tell you to go by the data sheet, and provide 70% of VCC. ...

Re: Source and Sink max

--- In , "Bob Smith" wrote: > My "rule of thumb" for this aspect of design considerations is that > "there ain't no rule of thumb". You have ...

Re: Re: MODA problems...again

c...@yahoo.com wrote: > Okay, so I've decided to hang on to my existing board for awhile (as > per request of a buddy of mine who helped me with the board's software) > and I...

Re: RS232 data switch   [2 Articles]

Dear friends Bob and Paul: I agree with Bob in all concepts. This should be done ( if possible ) on the TTL side. I manufacture a vehicle locator that was designed...

Re: XIRQ

--- In , "quyenqtran" wrote: > I would like to use the XIRQ interrupt as a power loss detection. > I have it connected to Vdd thru an external pul...

Re: Watchdogs and safety (was Thinking...)

Michael: There are many ways to write "almost failsafe" software. Filling unused program memory with NOP instructions could be one of them. Of course, after th...

RE: Watchdogs and safety (was Thinking...)

I've seen lots of great SW & HW 'bulletproofing' ideas bouncing around here.. maybe we can summarize the major ones in a couple of sentences, and the forum can ad...

Re: Re: Thinking...

I think that Bob Smith is right. Nothing is really failsafe. Defining what does "failsafe" could mean for your particular equipment requirements is the key. ...

Re: assembly trouble

In a message dated 3/10/03 10:05:55 PM Eastern Standard Time, writes: > I am trying to use the as11.exe assembler to compile some code. I am > getting an er...