Is an external pulldown resistor necessary on the GP input with internal pulldown pin?

Taka05 — Thu, 20 Apr 2023 07:19:11 GMT

GPIO_B0_04 is a 100kΩ pull-down input pin while MIMXRT1062 reset input POR_B = "L".

Furthermore, even after reset release, the default setting is an input pin with a 100kohm pulldown.

Is an external pulldown resistor(e.g.10kohm) required to use the GPIO_B0_04 as an input pin with pulldown?

Since the internal pulldown is not changed from the RESET state (pulldown 100Kohm), could this internal resistor be effective?

Re: Is an external pulldown resistor necessary on the GP input with internal pulldown pin?

kerryzhou — Fri, 21 Apr 2023 09:00:04 GMT

Please note, the GPIO_B0_04 is the BOOT_CFG[0], so you can refer to the MIMXRT1060-EVK board

Wish it helps you!

Best Regards,

Kerry