68HC11 Project

Started by nilesfantasy in M68HC1115 years ago 14 replies

I was wondering if anyone could suggest a simple project that could be conducted on the Motorola 68HC11. We had originally thought of doing...

I was wondering if anyone could suggest a simple project that could be conducted on the Motorola 68HC11. We had originally thought of doing a digital thermometer but another group has already proposed to doing that. We were looking for something along those lines though. Any suggestions would be greatly appreciated.


decompile file

Started by v_illiev in M68HC1115 years ago 2 replies

Hello I have file, that contains information stored in an EPROM. Can I view program? uP is MC68HC11E1.

Hello I have file, that contains information stored in an EPROM. Can I view program? uP is MC68HC11E1.


Hex keypad

Started by Art Burke in M68HC1115 years ago 2 replies

Could someone point me to a place to purchase a hex keypad that would be enclosed in a small plastic case, Making it a little more...

Could someone point me to a place to purchase a hex keypad that would be enclosed in a small plastic case, Making it a little more rugged? Thanks, Art


Bootstrap Mode

Started by Huey Fen in M68HC1115 years ago 34 replies

Good day, Here are some questions regarding the bootstrap mode. I've read through the bootstrap mode application notes (AN1060). But there...

Good day, Here are some questions regarding the bootstrap mode. I've read through the bootstrap mode application notes (AN1060). But there are something that I don't really understand. From pg 7 of AN1060, there is a paragraph sounds like this: "The number of data bytes in the downloaded program can be any number between 0 and 512 bytes (thesize of on-chip


Use JBUG11 instead of PCBUG

Started by Mark Schultz in M68HC1115 years ago 1 reply

A quick suggestion for those new to the 68HC11 who are trying to use PCBUG11 for debugging and loading programs: Don't. PCBUG11 is...

A quick suggestion for those new to the 68HC11 who are trying to use PCBUG11 for debugging and loading programs: Don't. PCBUG11 is a old DOS program that has known timing issues when used on a modern PC, even if that PC is booted into a 'pure' DOS mode. There's a much better, more modern alternative to PCBUG11: JBUG11. You can get it at:


Help with FDIV

Started by sirius_advocate in M68HC1115 years ago 5 replies

Good day, everyone. I hope someone can help to clarify some confusion about FDIV function. We are using MEMSic for angle measurement. ...

Good day, everyone. I hope someone can help to clarify some confusion about FDIV function. We are using MEMSic for angle measurement. Without going into details about memsic chip and fucntions, we are required to compare some values obtained from memsic with the lookup table that we have to created on the 68hc11 board. Here are my problems: We are not allo


How to output a decimal number

Started by Gabe in M68HC1115 years ago 3 replies

does anyone know how to print a decimal number to the screen: I get: 92 91 90 8f 8e I want: 92 91 90 89 88 ...

does anyone know how to print a decimal number to the screen: I get: 92 91 90 8f 8e I want: 92 91 90 89 88 thanks dudes.


The connection of MAX232

Started by circuitcyco in M68HC1115 years ago 3 replies

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 ...

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 internet and I am not sure which one is the correct one. I am not sure whether I should connect the XIRQ to the MAX232 or not. Please give me some feedback on this. Thanks a lot.


Urgent help with hc11!!!

Started by hombre_kenno69 in M68HC1115 years ago 19 replies

Hi all, i'm doing a course on the HC11 and i've been assigned a project that computes the distance between two points (given the change...

Hi all, i'm doing a course on the HC11 and i've been assigned a project that computes the distance between two points (given the change in height and length) thus using pythagoras to compute the hypoutenuse. I'm totally lost and stuck, since i'm not much of a programmer...at all So i'd appreciate any help at all! here's the question: The di


Problem regarding the Reset Pin of MCU

Started by Huey Fen in M68HC1115 years ago 13 replies

Hi here. I am doing my final year project on the design of Single Board Computer by using M68HC11. But I am facing a problem on the reset pin...

Hi here. I am doing my final year project on the design of Single Board Computer by using M68HC11. But I am facing a problem on the reset pin of the M68HC11. My reset circuitry worked fine without the connection of MCU. But once the MCU is connected to the reset circuitry, the reset pin (pin 17) of MCU became 0V. I suspected that the MCU had internally pull the reset pin to 0V. But I d


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