how to test LPC4320FBD144,551 with multimeter

[otpisani]

How can I test quick and easiest method with multimeter on hackrf board if IC LPC4320FBD144,551 working or not without desoldering actually LPC, can't get chip.into DFU mode also

[frank_m]

I think the idea to evaluate the state of a complex IC on the basis of a few logic levels is ill-fated.

After a careful visual inspection, check for a reasonable current consumption.
Then check the power supply levels at the MCU supply pins.
And then try to access it via JTAG/SWD pod or ISP interface.

[otpisani]

Sorry that I'm not clear enough. Like to know if any pin on LPC which is not in use, not connected, has the same resistance which I can measure with multi-meter, presume that I can't measure voltage on Vc pins just because board is "dead dead", although I have tip that actually LPC is cause of this, like to be more sure if it's positive without de soldering IC if is not necessary

[xiangjun_rong]

Hi,

Frankly speaking, I am not very clear about your question, can you clarify your question?

Sorry

BR

XiangJun Rong