Hello, I am relatively new to the 68HC12 (about 5 months) and I'm using it in a project that I've been working on. I know that the 68HC12...

Hello, I am relatively new to the 68HC12 (about 5 months) and I'm using it in a project that I've been working on. I know that the 68HC12 has an external addressing scheme that will allow one to reach 1MBytes worth of data. My question is this: What types of external memories are available? I have found an I2C 1Mbit EEPROM and some SPI flash memories, but nothing near 1MBytes that I...

Edward and All I am not clear about your answer for Query 1:- I have an Interrupt - A ISR executing and I have cleared the interrupt at...

Edward and All I am not clear about your answer for Query 1:- I have an Interrupt - A ISR executing and I have cleared the interrupt at the begining and enabled the interrupts by setting _CLI. Now assume that my Interrupt- A occurs , then in normal situation the Interrupt will start executing but in practical situation I dont want this to happen. What I want is that if something like this...

Hello everyone Queries :--- Query - 1 While executing an "Interrupt A" Interrupt Service Routine , the "Interrupt A" occurs again then...

Hello everyone Queries :--- Query - 1 While executing an "Interrupt A" Interrupt Service Routine , the "Interrupt A" occurs again then how should I handle the sitaution assuming that I dont want to miss any of the interrupts( even while execting ISR). Is it related to Deferred Service Routines ?? Query - 2 Nested Interrupts I mean if we have two interrupts :- Interrupt A(...

Hello All, did anybody scrutinize closely why Freecale tells us to use at least (!) 400nF to decouple the 2,5V core voltage? Especially...

Hello All, did anybody scrutinize closely why Freecale tells us to use at least (!) 400nF to decouple the 2,5V core voltage? Especially with the small 48 pin devices that's a pity because of the size of the capacitor(s). I also wonder why the capacitance has been increased over the years. Early documents suggested 2*47nF as minimum capacitance, 1/4 of the current value. I submi...

I'm having trouble getting the Softec PK-HCS12C32 Starter Kit to accept a test program written in assembly. To avoid introducing errors, I...

I'm having trouble getting the Softec PK-HCS12C32 Starter Kit to accept a test program written in assembly. To avoid introducing errors, I decided to try a minimal program, making no changes to the "stationery" code. I opened a new project in CodeWarrior and used the wizard to create an assembly project. Selected absolute (non-relocatable). Selected 9S12C32 and PK-HCS12 target. ...

Are there any differences between a COP reset and an external power up reset? I realize that the COP has its own vector that will be used if...

Are there any differences between a COP reset and an external power up reset? I realize that the COP has its own vector that will be used if the external reset is not actively pulled low by an external source. But, in my code both the COP vector and reset vector point to the same _Startup code. So, shouldn't they behave EXACTLY the same? I'm concerned about some registers not being reset...

I am having a hard time programming the MC9S12DP256. I am Using EmbeddedGNU 0.93 as my software. I have this guide on how to program the said...

I am having a hard time programming the MC9S12DP256. I am Using EmbeddedGNU 0.93 as my software. I have this guide on how to program the said microcontroller. It is said that I should be on mode 4 (bootloader) then I should reset the button. I followed this instructions. I followed that I should choose a then b, the bootloader will wait for my file. (do this really takes a long time???). When I sa...

Hi. I have been using CodeWarrior with my A128 micro. I've recently run into a problem with my new project where CodeWarrior does not link any...

Hi. I have been using CodeWarrior with my A128 micro. I've recently run into a problem with my new project where CodeWarrior does not link any Ansi library. I cannot do any switch (case) statements and some bit shifting ( < < or > > ) does not work. I am using small memory model and I thought it should automatically link in one of the ansi*.lib files but it does not. Any ideas? Thx,

Hello everybody, Anyone knows how if there is any application note for reprogramming the HC12S mcu using the CANBUS serial...

Hello everybody, Anyone knows how if there is any application note for reprogramming the HC12S mcu using the CANBUS serial communitations!! I will thank you any feedback. Best Regards, Alcuemar

Hello people, somebody knows about a free programmer for the HCs12 family? In old messages i didn't find information about free hardware...

Hello people, somebody knows about a free programmer for the HCs12 family? In old messages i didn't find information about free hardware programmers. Thank you very much, Pablo (Argentina, Buenos Aires)