When writing to ESP32-C3 Flash, is GPIO2 HIGH or LOW?

[msfujino]

This is my first post.

I am trying to write code to Flash on an ESP32-C3FN4 (Seeed XIAO ESP32C3).
I read the following document about GPIO2 and it says that it is necessary to set GPIO2=1 at reset.
1. "ESP32-C3 Series Datasheet Version 1.2, 2.4 Strapping Pins, Table 4: Strapping Pins"
2. "ESP32-C3 Technical Reference Manual 7.2, Boot Mode Control, Table 7-2: Boot Mode Control."

I tried to pull up and down GPIO2.
When GPIO2=OPEN and GPIO2=LOW, it is possible to write to Flash, but not when GPIO2=HIGH.

I would appreciate it if someone could explain why.