Programming STM32H743 Nucleo-144 with with ST-link2

[Alzomor]

I have a stand alone ST-link/V2 and I need to use it to flash the FW to a STM32H743 Nucleo-144 "Nucleo-H743ZI"

I removed the two jumpers on CN4 to disconnect the on board ST-Link 
and Connected the following Signals, the table show mapping from Nucleo CN11 pin

Signal	Nucleo CN11 Pin#	ST-Link ICD20-Pin#
VDD	12 - 3.3V	1 - MCU VDD
GND	8 - GND	4 - GND
SWDIO	13 - SWDIO	7 - SWDIO
SWCLK	15 - SWCLK	9 - SWCLK
NRST	14 - NRST	15-NRST	Optional

the board is powred through CN1
The Programmer is connected but the target Volatage is not 3.3V

and when I try to connect I get this error

13:26:57 : STM32CubeProgrammer API v2.19.0 | Windows-64Bits 
13:29:41:379 : UR connection mode is defined with the HWrst reset mode
13:29:41:518 : ST-LINK SN  : 57FF6D067186535413301487
13:29:41:518 : ST-LINK FW  : V2J46S7
13:29:41:518 : Board       : --
13:29:41:518 : Voltage     : 0.58V
13:29:41:519 : Error: Unable to get core ID
13:29:41:519 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication
13:29:41:549 : Disconnected

How to overcome this problem

regards
Hossam Alzomor

[TDK]

Is the nucleo board powered? If so, how? The programmer does not provide power over pin 1. It has VDD on pin 19 if you want to use that.

[Alzomor]

The Nucleo is powered  through the USB connector CN1
I am connecting pin1 of the IDC20 connector to allow the programmer to monitor the supply voltage of the microcontroller.

[TDK]

> The Nucleo is powered  through the USB connector CN1

Evidence suggests otherwise, no? Are any LEDs on the board on?

Show a picture of the board with jumper positions visible. Should be configured for USB power.

Why use an external programmer on a board that has an on-board programmer? Perhaps you damaged the hardware and this is a last ditch attempt to use it?

[Alzomor]

LD4(COM) and LD6(PWR) are turned on
and CN4 jumpers are removed 

 

[TDK]

LD7 (overcurrent) on indicates the board has potential hardware issues. Is it possible something on the board was damaged?

Why do you want to use an external programmer to program a board with an on-board programmer? If there is a hardware problem, this will not circumvent it.

[Alzomor]

The Board is not damaged, I am still able to program it using the buildin ST-Link programmer .

I am using the external programmer to validate the conenctions and SW before using the external programmer with another STM32 board.

[Imen.D]

Hello @Alzomor ,

Try the "Connect Under Reset" mode.

Check the jumper positions

[TDK]

> 13:29:41:518 : Voltage : 0.58V

It's not going to connect when the target voltage is 0.94 V or 0.58 V. That's the problem that needs fixed.