PullDown of i.MX7D BOOT_MODE[1:0] pins

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PullDown of i.MX7D BOOT_MODE[1:0] pins

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torus1000
Contributor V

Hi,

I believe BOOT_MODE pin configured as 100k pulldown during POR. See Note #1.
But i.MX7D datasheet on p112 Table 96 looks Hi-Z as following.

7d_100k_pd.png

Which one is correct, pulldown or hi-z?

If hi-z is correct, external pulldown resister is need for Low input, right?

Can someone help me?

Note #1

https://www.nxp.com/docs/en/reference-manual/IMX7DRM.pdf

   p1600 8.2.5.11 SW_PAD_CTL_PAD_BOOT_MODE0
      PE=1 Pull enable, PS=00 100K PullDown
   p1602 8.2.5.12 SW_PAD_CTL_PAD_BOOT_MODE1
      PE=1 Pull enable, PS=00 100K PullDown

https://www.nxp.com/docs/en/data-sheet/IMX7DCEC.pdf

   p125 Table 99. i.MX 7Dual 12 x 12 mm
      Ball Ball Name Power GroupDefault Mode Default Function PD/PU
      Y01 BOOT_MODE0 NVCC_GPIO1 ALT0 BOOT_MODE0 100K PD
      Y02 BOOT_MODE1 NVCC_GPIO1 ALT0 BOOT_MODE1 100K PD

   p142 Table 102. i.MX 7Dual 19 x 19 mm functional
      Ball Ball Name Power GroupDefault Mode Default Function PD/PU
      P04 BOOT_MODE0 NVCC_GPIO1 ALT0 BOOT_MODE0 100K PD
      P05 BOOT_MODE1 NVCC_GPIO1 ALT0 BOOT_MODE1 100K PD

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  You are right, BOOT_MODE pin configured as 100k pulldown during POR.


Have a great day,
Yuri

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  You are right, BOOT_MODE pin configured as 100k pulldown during POR.


Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

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