Help! I have two new boards with HC9S12DP256B chips on. Mask revision 1K79X. Both boards run a simple test program to toggle one pin at about 1Hz, send a...
The Colpits oscillator on my mc9s12e128 amplitude is 1.2V with the negative peak 420mV above 0V at EXTAL. The crystal is: 3.6864MHz, and the capacitors are...
Jonathan, 1) When using the Colpitts configuration, include a DC decoupling cap between the crystal and the EXTAL input. I have encountered several customer ...
Doron Fael
doronf@...
Aug 2, 2004 8:17 am
7922
... Do you have some more information about these failures? AFAIK the only problem with DC across the crystal is metal migration causing a short circuit, but...
... Is because that makes the board layout better reducing track lengths and therefore parasitic effects. Andrew [Non-text portions of this message have been...
I've just design a board with 9s12dp256 and expansion RAM following AN2408/D, following example 5 : "Word wide RAM SRAM ECS gated". The memory chip is exactly...
... It happened with two different customers, both on HCS12: Without the DC blocking capacitor the Colpitts crystal would simply not start. After adding the DC...
Doron Fael
doronf@...
Aug 2, 2004 10:06 am
7926
Almost ditto here see: "Choice of External RAM" - !ECS won't give you access to RAM below 0x8000. I considered using S12DP256, and received off data-sheet data...
The topic of expanded mode use of HCS12 is a very complicated matter. I have addressed the topic in a number of long postings to this email list, in the past....
Doron Fael
doronf@...
Aug 2, 2004 11:58 am
7928
There is 2 flash blocks on Motorla DG128: Flash Block 0 and Flash. Block 1. For Flash Block 1 i had set the security byte(0xFF0F) to 0xFE (security disabled)...
Flash Block 0 corresponds to Pages 3C - 3F and Flash Block 1 corresponds to Pages 38 - 3B (counter intuitive than can be expected). Check figure 3-1 of: ...
Doron Fael
doronf@...
Aug 2, 2004 4:51 pm
7930
... Other people have mentioned the possible hardware difficulties, but since you mention with debugging I ask : Are you trying to access the RAM from a ...
John Hartman (NoICE)
john@...
Aug 3, 2004 1:32 am
7931
... Google hasn't heard of this thing. Does anyone have any information on it? Best regards, John Hartman john@... NoICE Debugging Tools ...
John Hartman (NoICE)
john@...
Aug 3, 2004 2:09 am
7932
Hi All, I am using the last 4k of the flash (including vector space) to utilise a boot code that has firmware upgrade capability. This code is always present, ...
Hi All, Just after a bit of advice here on metrowerks. Is it possible to prevent metrowerks from doing its copy to ram on initialisation. From a look at the ...
Hi, In a PowerPC application I did not protect any flash. I could update the bootloader when running the application or visa-versa. The Bootloader is now...
Hello, Doron! Thank you for answer. I forget to say, i program flash in special mode. Yes, i know about protection: 0xFF0C is protection byte for Flash Block 1...
Location 0xFF0F is part of Flash Block 1 - not Flash Block 0. In other words: You need to protect Flash Block 1 - not Flash block 0, in order to protect ...
Doron Fael
doronf@...
Aug 3, 2004 8:59 am
7939
Maybe i stupid, but I can't understand how it can be. Text on page 15 of FTS 128K User guide is describe Flash Block 0 holding protection bytes for all other...
I am sorry. My mistake. My email from yesterday contained the right information. The email from today was wrong (I got confused between Block 1 and Block 0). ...
Doron Fael
doronf@...
Aug 3, 2004 11:11 am
7941
Hi, Thanks for the help. I got it going now. I was using PWF's. Thanks scott...
... There is a segment qualifier that you can use in the *.prm file: NO_INIT Here is the definition given by the manual: "...Qualifies a segment, where read...
Hi All, I am trying to call some dbug12 functions from my program I looks like it would be easier for me to use assembler to do it. I tried this... asm { LEAX...
Hi Joe, Do you intend to call a routine which is located at the fixed address 0xFE16? Try asm { LDX #0xFE16 JSR 0,X } or asm { JSR 0xFE16 } or as C Code: ...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
