topic Re: LPC5502 - pin 1 identification in LPC Microcontrollers

LPC5502 - pin 1 identification

ianbenton — Thu, 13 Apr 2023 15:07:04 GMT

I have recently received a new consignment of LPC5502JBD64E. They have a pin 1 identification dot in one corner. Then they have a second pin 1 identification dot in the diagonally opposite corner.

Which pin 1 identification dot represents pin 1?

Re: LPC5502 - pin 1 identification

RaRo — Thu, 13 Apr 2023 21:14:01 GMT

Hello @ianbenton,

Could you please share us a photograph of your LPC5502JBD64E microcontroller showing the dots?

Best regards, Raul.

Re: LPC5502 - pin 1 identification

ianbenton — Fri, 14 Apr 2023 05:16:02 GMT

I haven't got one with me right now, but they are both circular depressions, exactly what is commonly in use as a pin 1 identification mark. One is slightly bigger than the other.

Re: LPC5502 - pin 1 identification

RaRo — Fri, 14 Apr 2023 18:53:31 GMT

Hello @ianbenton,

Could you please send us the photograph of your microcontrollers when you have the opportunity? It would be very useful. Meanwhile, please refer to Chapter 4. Marking of the LPC55S0x/LPC550x datasheet for more information. Also, it might come in handy to use the NXP logo and information print position in the microcontroller as a guide to know which dot is pointing to pin 1.

[LPC55S0x/LPC550x datasheet. Chapter 4. Marking]

Best regards, Raul.