Realtek switch SoC docs

maple register: EXTENDED_FEATURE_CTRL0

Details

Name
EXTENDED_FEATURE_CTRL0
Offset
0038
Feature
INTERFACE

Fields

Name LSB Bits Description
DUMMY 2 30
I2C_GPIO_IF_SEL 1 1
PROTECT_CIRCUIT_ENABLE 0 1

Realtek SDK, rtl8380_regDefault_init():

Protect settings to prevent access out of range, becasue register Range is different from 82M & 80M, 32M & 30M

This is a protected field.