| GPIO port | Default state | Waveform | Remarks |
|---|---|---|---|
| GPIO_5 | high | Figure one | |
| GPIO_17 | high | Figure one | |
| GPIO_16 | high | Figure one | |
| GPIO_20 | high | Figure one | |
| GPIO_21 | high | Figure one | |
| GPIO_22 | high | Figure one | |
| <font color="f1b10d">GPIO_26</font> | <font color="f1b10d">高</font> | <font color="f1b10d">Figure 5</font> | <font color="f1b10d">After power-on, there will be a pull-up to about 3v in 632ms, and a pull-down after 704MS.</font> |
| GPIO_25 | high | Figure three | After power on, 610MS will be pulled up and 710MS will be pulled down. |
| GPIO_24 | high | Figure Four | After power on, 610MS will be pulled up and 710MS will be pulled down. |
| GPIO_28 | high | Figure Four | After power on, 610MS will be pulled up and 710MS will be pulled down. |
| GPIO_27 | high | Figure Four | After power on, 610MS will be pulled up and 710MS will be pulled down. |
| GPIO_14 | low | Figure II | |
| GPIO_15 | low | Figure II | |
| GPIO_19 | low | Figure II | |
| GPIO_18 | low | Figure II | |
| GPIO_3 | low | Figure II | |
| GPIO_2 | low | Figure II | |
| GPIO_0 | low | Figure II | |
| GPIO_9 | low | Figure II | |
| GPIO_12 | low | Figure II | |
| GPIO_10 | low | Figure II | |
| GPIO_11 | low | Figure II | |
| GPIO_6 | low | Figure II | |
| GPIO_4 | low | Figure II | |
| GPIO_1 | low | Figure II | |
| GPIO_23 | low | Figure II |
Figure one
Figure II
Figure three
Figure Four
Figure 5