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sandhya
sandhya
Associate
June 6, 2014
Question

designing ISP header for STM32F030F4P6

  • June 6, 2014
  • 1 reply
  • 823 views
Posted on June 06, 2014 at 07:36

Hello,

I am designing a board using STM32F030F4P6. I have to use STM32F0 Discovery board STLINK for ISP. Checking the schematics of Discovery board, I found out that the ISP connector (SWD) is connected as follows:

1.3.3V

2.SWCLK

3.GND

4.SWIO

5.NRST

6.PB3 of the STM32 controller on board.

Now, I have trouble understanding the 6th connection. the signal name is given as T_SWO and it is connected to PB3. what is this signal? In TSSOP 20 package of STM32F030F4P6, this pin(PB3) is not there. so where should I connect 6th pin of ISP header? or can i leave it open?

Referances:

MB1034: Discovery board schema

DM00088500.pdf: STM32F030F4P6 Datasheet

DM00039193.pdf:STM32F051xx Datasheet

#stm32f03x6
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1 reply

Tesla DeLorean
Tesla DeLorean
Guru
June 6, 2014
Posted on June 06, 2014 at 13:50

PB3 SWO is typically used in support of the SWV (Serial Wire Viewer), as far as I'm aware the Cortex-M0 does not support this functionality (Debug/Trace), or JTAG, so the pin can be left unconnected.

If may be connected in the schematic due to the way ST shares a common footprint over several processor families, allowing migration up and down the feature/power/cost line.

I, personally, would opt to use the standard 10-pin 0.05'' pitch ARM programming header over the ST ISP one.
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