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Entering ROM Bootloader via UART on MKl03Z32VFG

Question asked by Richard King on Jun 22, 2017
Latest reply on Jul 12, 2017 by Richard King

Hi All,


I have a board which uses the MKL03Z32VFG4 and I'm trying to connect to it using the blhost utility but I receive the following error: Error: Initial ping failure: No response received for ping command. (I have also tried the KinetisFlashTool)


I am using the following pin configuration:

   pin 3 - PTA3 LPUART0_TX

   pin 4 - PTA4 LPUART0_RX


Searching for similar problems I found Problems entering Bootloader mode. MKL03Z32VFG4. 


The response specifies the following connections are required: PTB1 as LPUART0_TX and PTB2 as LPUART0_RX


Can someone confirm whether these are the only pins that can be used with the ROM Bootloader for a UART connection on this device. I am using the Bandgap which requires an external 100nF decoupling capacitor on the Vref pin - PTB2.


Therefore I made my UART connections on PTA3 & PTA4 as noted above.


Thanks for any assistance.