LPC2103 strange behavior in bootloader

cancel
Showing results for 
Search instead for 
Did you mean: 

LPC2103 strange behavior in bootloader

259 Views
maxtch
Contributor I

I am building a dev board based on LPC2103. I am having some problem with the ROM bootloader: I can autobaud, but almost any command would cause it to autobaud again at a different baudrate, and no actual bootloader access is possible. The USB to serial chip is a STM32F042F4P6 programmed with a USB to serial firmware, and that MCU has access to P0.14 and RESET lines beside UART0.

What is causing this problem? The chips has date code 1209. (I bought it back in 2014, but allowed it to sit in my parts bin for a few years before finally came up with the project.)

Labels (1)
Tags (2)
0 Kudos
2 Replies

114 Views
jamesbone
NXP TechSupport
NXP TechSupport

Do you have like a schematic on how this has been done?  have measure the clock of the LPC2103 to warranty it is stabilize once the boot it is assure by the USB to UART.

0 Kudos

114 Views
maxtch
Contributor I

Here it is - the board is open source, so if you see a problem just edit it with KiCad v5 and submit a pull request.

GitHub - SushiBits/SushiBitsARMClassic: ARM7TDMI in Arduino format 

0 Kudos