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U
Ushasri
Associate
May 12, 2026
Solved

Unable to Identify Pin-1 Orientation on M95P08-IXMNT/E – No Visible Marking on Package

  • May 12, 2026
  • 5 replies
  • 210 views

Hi,

I am using the M95P08-IXMNT/E flash memory IC and I am unable to identify the Pin-1 orientation on the package.

The device does not appear to have any visible:

  • dot/dimple
  • chamfer
  • laser marking
  • beveled corner

I checked carefully under light and magnification, but I still cannot find any Pin-1 indication.

Could anyone please help with:

  1. How to identify Pin-1 on this package?
  2. Any package photos/reference images?
  3. Whether some lots come without visible Pin-1 markings?

Thanks.

Best answer by mƎALLEm

+ Generally you can follow the marking orientation:

mALLEm_0-1778585177498.png

5 replies

M
mfgkw
Associate II
May 12, 2026

The edge starting with pin 1 is a bit different, see picture.

    RobK1
    RobK1
    Associate II
    May 12, 2026

    The SO-8 package should have a chamfer on the Pin-1 side.

    RobK1_0-1778585010390.png

    Can you share a clear picture?

      mƎALLEm
      mƎALLEmAnswer
      Technical Moderator
      May 12, 2026

      + Generally you can follow the marking orientation:

      mALLEm_0-1778585177498.png

      To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
      U
      UshasriAuthor
      Associate
      May 13, 2026

      Thanks for the clarification regarding the Pin-1 orientation of the M95P08-IXMNT/E package.

      I am currently interfacing this IC with an STM32H755ZIQ board using SPI. My connections are:

      • SCK -> PA5

      • MISO -> PA6

      • MOSI -> PD7

      • CS -> PA4

      I am trying to read the Device ID/JEDEC ID from the flash memory, but I am not getting the expected response value (receiving zeros/invalid data).

      Could anyone please help with:

      • Correct SPI configuration required for the M95P08

      • Supported SPI mode (CPOL/CPHA)

      • Required reset/power-up sequence

      • Example command sequence for reading JEDEC ID

      • Whether HOLD/WP pins need pull-ups or specific states

      • Any STM32-specific considerations while interfacing this IC

      If anyone has a working initialization/read-ID example, it would be very helpful.

      Thanks.

      M
      mfgkw
      Associate II
      May 13, 2026

      Since this is a different topic maybe you should open a new question for it?

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