topic Re: MCF5213 not running in ColdFire/68K Microcontrollers and Processors

MCF5213 not running

philroth — Tue, 28 Feb 2017 22:19:19 GMT

Having trouble starting up a MCF5213. I know the code is good because it ran on an eval board and my design is very similar, for now only toggling a LED on a GPIO pin every 500ms using a timer interrupt. Again, code runs on the Eval board so it's the hardware. The only activity I see is the 48MHz on the PSTCLK. Input is an 8MHz oscillator and clkmod = 1:1. Unfortunately clkmod pins are tied to VCC under the chip and can't be easily modified. CPU can be successfully programmed via eZport and verifies so the cpu is allowing the flash to be loaded. Any help is appreciated.

Thanks

Attached is schematic

Re: MCF5213 not running

philroth — Wed, 01 Mar 2017 03:24:41 GMT

I Left the BKPT# pin floating so CPU halted. Pulled up to VCC and runs like a champ

Re: MCF5213 not running

miduo — Mon, 13 Mar 2017 06:17:45 GMT

Hi,

From the schematic attached, I can not find the BDM connection. You mentioned that pulled the BKPT up to VCC, do you use the 4.7K pull-up?

Re: MCF5213 not running

philroth — Mon, 13 Mar 2017 10:36:01 GMT

Put it right to VCC to get me going but have added a 4.7k pullup to the final design. Also had trouble getting Port DD working as GPIO but got that working also after some more reading.