Help designing STM32F107 Breakout board

[shilpa]

Posted on October 08, 2012 at 18:24

Hi,

I am designing a breakout board for STM32F107RCT6, my main requirements are:

1. Minimum components
2. Program reflash via DFU mode
3. Able to use the DFU USB as a Virtual Com Port in user application

Based on my research, I need:

1. BOOT0 = 1, BOOT1 = 0 since I only need to boot into System Memory
2. Weak pull-up on NRST (is it actually needed? NRST has an internal pull-up, right? CD00164185.pdf, figure 5)
3. PA10/PD6/PB5 either pull-up or pull-down
4. HSE & LSE clocks per reference design (CD00164185.pdf)
   1. 4 to 24MHz crystal on HSE
5. PA9 to USB_VBUS
   1. Bootloader V3.x does not specify that it is required? 
   2. How do I find out which bootloader version in on a given chip?
6. PA11 to D-, PA12 to D+ via 22Ohm series resistors
   1. If I do not need OTG feature (only need Virtual Com Port), do I need to connect any other pins? Like the OTG_FS_ID (PA10)

Am I missing any connections? Any help is highly appreciated.

Thank you

[David Littell]

Posted on October 08, 2012 at 21:47

Have you seen:

https://www.olimex.com/Products/ARM/ST/STM32-H107/

...or possibly:

https://www.olimex.com/Products/ARM/ST/STM32-P107/

[russdx]

Posted on October 08, 2012 at 22:18

http://www.ebay.co.uk/itm/Core407V-STM32F407VET6-STM32-ARM-Cortex-M4-Development-Board-Full-I-O-Expander-/261045971937?pt=LH_DefaultDomain_0&hash=item3cc78d6be1#ht_4312wt_1019

ahh where is the delete button!