STM32C031G4U6 bare microcontroller with stlink is not detected

[oyalç.1]

i bought 3 STM32C031G4U6 microcontrollers from digikey turkey distributor and soldered them on breakout boards. i have them connected with stlink v2 over SWCLK and SWDIO i double checked connections and power but i can not program them. it just gives out this:

Starting server with the following options:

Persistent Mode : Disabled

Logging Level : 1

Listen Port Number : 61234

Status Refresh Delay : 15s

Verbose Mode : Disabled

SWD Debug : Enabled

InitWhile : Enabled

Target no device found

Error in initializing ST-LINK device.

Reason: No device found on target.

what do i do?

[TDK]

Som possibilities:

• Verify part orientation. Pin 1 is lower left when "STM32" is read from left to right.
• Bad soldering job, pins aren't connected. Going to be harder to solder/verify a UFQFPN48 vs a LQFP48. Consider posting a high resolution in-focus image.
• Insufficient bulk capacitance. A 0.1uF and 4.7uF should be soldered next to VDD/VSS pins. Guessing you don't have one. It may work without it, but it doesn't follow the layout guidelines.
• Try a different programmer. Note that counterfeit programmers are prone to bad behavior. STLINK-V3MINIE is cheap and works.
• You are using STM32CubeProgrammer to program, correct?

[oyalç.1]

I didn't had caps soldered so I will try that. 

I was just trying to program it from the ide. With that green little button on top

[Tesla DeLorean]

Perhaps easier to test via STM32 Cube Programmer directly. 

Check analogue supplies. Check level see on NRST.

To standalone ST-LINK connect VCC, GND, SWDIO, SWCLK and NRST.

Off NUCLEO boards disconnect on board target via jumpers.

[oyalç.1]

The problem is there is no NRST pin on microcontroller. Just 2 pins for power and gnd

[oyalç.1]

i soldered necessary caps and still nothing. neither cube ide or cubeprogrammer sees the microcontrollers.

i even updated the firmware on the stlink

[TDK]

PF2 and NRST are double bonded. (i.e. the NRST pin and the PF2 pin are the same)