起動時とHalt時（Shutdown）のGPIOの状態 Raspberry Pi Zero WH

起動時（動作時）, Halt時（Shutdown）, Pin#, Setting
1, 1, GPIO2/SDA, I2C disable
1, 1, GPIO2/SDA, I2C enable
1, 1, GPIO3/SCL/WUP, I2C disable
1, 1, GPIO3/SCL/WUP, I2C enable
1, 1, GPIO4, in pull-up
0, 0, GPIO17, default
1, HiZ (in?), GPIO18, out high
1, 1, GPIO18, out high & external 47K pull-up
1, 0, GPIO18, out high & external 47K pull-down
0, HiZ (in?), GPIO18, out low
0, 1, GPIO18, out low & external 47K pull-up
0, 0, GPIO18, out low & external 47K pull-down

Halt時（Shutdown）からのWakeup
可否, 状態遷移, Pin#, Setting
OK, 1→0, GPIO3/SCL/WUP, I2C disable
OK, 1→0, GPIO3/SCL/WUP, I2C enable
OK, 1→0, RUN/WUP, default

起動時（動作時）のReset
可否, 状態遷移, Pin#, Setting
NG, 1→0, GPIO3/SCL/WUP, I2C disable
NG, 1→0, GPIO3/SCL/WUP, I2C enable
OK, 1→0, RUN/WUP, default