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erazmus
erazmus
Visitor II
August 8, 2014
Question

STM32F429 minimal schematic

  • August 8, 2014
  • 6 replies
  • 1896 views
Posted on August 08, 2014 at 17:21

Hello!

I'd like to design minimal schematic for STM32F429. I'd like to have all pins connected to goldpins. I want to program through ST-LINK and SWD. Please check my schematic. It's in the attachment.

Thanks!

#stm32f429 #basic-circuit
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6 replies

Tesla DeLorean
Tesla DeLorean
Guru
August 8, 2014
Posted on August 08, 2014 at 17:42

I'd definitely recommend getting NRST to the debug connector, and would strongly suggest providing a standard connector (10-pin SWD or 20-pin JTAG)

Also consider a jumper option for BOOT0, and the ability to power VBAT independently.
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NEERAJ GUPTA
NEERAJ GUPTA
Associate III
September 4, 2014
Posted on September 04, 2014 at 09:08

Hi Clive,

i have connected MAX3232 with STM32F429ZIT6 as per schematic attached. i have serial port application ''com port toolkit'' configured at 9600 ,8E1 , having 0x7F to this device , the device is replying 0x7F 0xFF 0xFF instead of 0x79 as instructed by you. Further connecting SWCLK & SWDIO pins to STLINK V2 given on your STM32L1-Discovery kit with jumpers removed from CN3. i tried to access the chip on keil after selecting the debug as STLINK. Only STLINK was detected but this device was not. i have checked all Vss & Vdd connections against short circuit. i have set chip Vdd=3.3VDC which converted from Vcc=5VDC , 2A DC power supply. Please! help me.

________________

Attachments :

repeater.PDF : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0Wg&d=%2Fa%2F0X0000000bcr%2Fx2oD6xvySn8P1qqDIKwjyIH1sMzarYia81.LBacxsiU&asPdf=false
NEERAJ GUPTA
NEERAJ GUPTA
Associate III
September 4, 2014
Posted on September 04, 2014 at 10:01

Hi clive,

              I have gone through your various posts. I have connected 2.2uF,50V polarized electrolytic capacitors to both VCAP1 & VCAP2 pin. i hv grounded both from -ve marked terminal. I m not getting ~1.2 V on both , the voltage is fluctuating around 0V. Further, 2.2uF ceramic non-polarized caps are not available in India , all i can do is connecting  two pieces of 1uF non-polarized ceramic caps or connect 100nF cap with 2.2uF,50V polarized electrolytic capacitor in parallel to connect with VCAP pins. Please! suggest & help me to decide which combination will work correctly.    

Tesla DeLorean
Tesla DeLorean
Guru
September 4, 2014
Posted on September 04, 2014 at 10:54

I'll take a look at the schematic, but you need to be very sure of the part orientation, and where Pin 1 is.

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NEERAJ GUPTA
NEERAJ GUPTA
Associate III
September 4, 2014
Posted on September 04, 2014 at 12:09

Hi Clive,

              yes, i m very much sure about part orientation. I m counting PIN no 1 from left notch found on upper left side of  target chip just below ARM logo.  

NEERAJ GUPTA
NEERAJ GUPTA
Associate III
September 4, 2014
Posted on September 04, 2014 at 13:40

Hi Clive,

I have managed to get 2.2uF ceramic non-polarized cap . but still i m not able to ~1.2 V DC across the VCAP pins. Please! go through my latest schematic. i have tested the circuit against all possible other technical glitches. Please! suggest me what to do.

________________

Attachments :

repeater.PDF : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0iA&d=%2Fa%2F0X0000000bcp%2FHAIq8C8cJXHxL9_7WswPqTrEv9vEA3iEz9Sc7sC0H5Y&asPdf=false
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