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8 years, 7 months ago.
Power Distribution for MBED Interface chip and Target chip
Hello mbed community,
Does the MBED interface chip have to be powered while the target runs normally? Obviously it has USB power when a program is being uploaded. Let's say the USB is unplugged and the interface chip does not have power, but the target does. Will the target run normally?
Asked another way: does the bootloader program the binary that is dropped into the MBED "drive" directly into the target flash (i.e. it will continue to run that program at power-on until it is changed)?
I'm trying to create an mbed-enabled board but am worried about unnecessary power consumption of the mbed interface chip if it isn't doing anything.
Thanks a lot!!!!
1 Answer
8 years, 7 months ago.
The interface chip is not required once the target is programmed. The program then resides in the target flash, and is in no way dependent on the interface chip (with some small exceptions, for example the KL25 with default code relies on the interface chip to generate a 32kHz signal for its RTC -> without interface chip it has no clock to its RTC).
And you should definately if you want to go for low power add an option to comlpetely disable the interface chip.