Posted on June 12, 2006 at 12:06Hi all !
I have found a problem that I do not understand.
I am using ST7Flite29, internal oscillator, no external reset circuit and the ICP interface to flash the MCU on a design board.
When using a design and not using the eeprom everything works well.
But when trying a test-design also activating the eeprom the MCU does not starts working at all.
Flashing with an ''non-eeprom design'' again and everything is working….
But !
If I flash a new empty MCU with a ''eeprom-software''.
Then starts my design board = power up.
Then grounding the reset pin for a second the design are running correct.
After this first hardware reset I can repeatedly flash the same MCU with ''non-eeprom designs'' and back to ''eeprom-designs'' and all works fine!
No extra resets are needed.
I’ve got “a feeling� that a ''eeprom-design'' has to produce a “initial-first-time-in-use reset� when flashing a new ( empthy ) MCU.
Have you any suggestions or am I missing something ?
BR
Tomas
