replace stm32f103 with stm32L15x part

xzhang2 · ‎2011-06-21

Posted on June 21, 2011 at 15:59

it seems stm32L152 is almost pin to pin compatible with stm32f103. I am thinking to replace current design with L152 part. but I did find any ST documents talking about this. does anyone done this? any suggestion or tricks for it? Thanks,

JZ

#stm32l15x

js23 · ‎2011-06-21

Posted on June 21, 2011 at 18:52

Hardware:

Many times the L15x will be a drop in replacement. Only major difference is, that the L15x has no connection for backup battery, so make sure that Vlcd (Vbat) connection is OK. (connect to Vdd for L151). Besides that, external parts for USB soft disconnect are no longer required.

Software:

Everything is very similiar, but different in little ways. Periperials in L15x are closer to the F2xx than to the F10x. Expect some work to be done here.

My experience: No big deal at all. But I have not touched the USB lib up to the moment, so let's see what is waiting there...

xzhang2 · ‎2011-06-21

Posted on June 21, 2011 at 22:52

thanks for reply.

I notice Vlcd/Vbat difference from L152. That should be easy to fix.

We are not using USB on F103. So on software side, major thing should be update our development tools to support L15x.

If we want to use USB, I prefer F200 part. They support HS USB. Unfortunately I have not seen USB library for F200 yet.