How to Supply Power
The Intelligent Edge Micro (Micro) has no built-in battery. Supply power from an external DC power source.
- Power supply from USB
- Power supply from the ZH8 connector
Power Supply from USB
Connect the dedicated Type-C cable to the Micro.
Cables other than the dedicated one can be used as long as they fit.
The requirements for an AC adapter are as follows.
| Item | Requirement |
|---|---|
| Power | 5 W or more |
| PD | Not required (no problem if a PD function is present) |
- When connecting USB to a PC or similar, it is recognized as a CDC device (serial communication device).
Power Supply from the Connector
Power can be supplied from the ZH8 connector at the bottom. This is a 5V input of the same standard as USB.
The connector arrangement is as follows.
| Item | Pin Assignment | Comment |
|---|---|---|
| 0 (product edge side) | VDD IN (5v) | Connect the 5V input here. |
| 1 | 3.3V Out | When 5V is input, the output of the internal regulator (3.3V bus) is provided. |
| 2 | GND | Connect the 5V input here. |
| 3 | GPIO4 | |
| 4 | GPIO3 | |
| 5 | GPIO2 | |
| 6 | GPIO1 | |
| 7 (product center side) | GPIO0 |
Comparison of Power Supply Methods
❗
[Internal Power Conversion Efficiency]
Connector power supply ＞ USB power supply. 👉 To achieve maximum efficiency in sleep-centric use with solar panels and the like, connector power supply is recommended.
| Item | Connector Use | USB Use |
|---|---|---|
| Voltage range | DC 5.0–5.5 V | DC 5.0–5.5 V (USB standard range) |
| Power consumption | Approx. 0.2 W on average 👉 May spike temporarily during communication, etc. |
Same as left |
| Protection circuit | — | Reverse-connection and reverse-current prevention circuit |
Behavior at Low Voltage
Order of Operation Shutdown
When the power voltage drops, shutdown occurs in stages.
① Near 3.3 V: If the 3.3 V bus is maintained, the network and so on may continue
② Below 3.3 V: Each component shuts down in sequence
Anomaly Detection and Restart by obnizOS
obnizOS automatically restarts and reconnects when it detects an anomaly.
👉 Even when recovering from a partial voltage drop, it will attempt to re-establish the network.