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hc08 monitor mode question

Question asked by asdf asdf on Jun 23, 2009
Latest reply on Jun 25, 2009 by asdf asdf

According to the HC08QY series datasheets, they have an internal charge pump to program the flash memory.  Also, according to the datasheet an external high voltage is absolutely required on one of the pins in order to get it into normal monitor mode.

 

why would the externally applied high voltage need to be present if it has an internal charge pump to generate the same high voltage?  this does not make sense to me.  why not just generate the voltage for programming in monitor mode internally, and save me the trouble of doing it?

 

thanks!

-Sam

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