Inkplate 5V2 – Jumpers
Inkplate 5V2 features several on-board jumpers, which can be used to modify the behavior of certain components. Some jumpers are connected by default, while others need to be manually shorted.
See the table below for a detailed explanation of each jumper's function:
Board jumpers
| Jumper | Default State | Function |
|---|---|---|
| JP1 | NO (not connected) | When shorted, it keeps the microSD card powered at 3.3v at all times. Useful for troubleshooting, but not ideal for low-power applications. |
| JP2 | Connected to INT by default | Switch between a digital, open-drain, active low interrupt output and a programmable digital square-wave output that can be used as a system clock. |
| JP3 | Connected to SPI_CS(IO15) by default | Switch between connecting the CS pin of the microSD card reader to the IO15 pin or the SD0 pin on the ESP32. |
| JP4 | NO (not connected) | When shorted, bypasses the 330-ohm resistor connected to the buffer, causing the ESP32 to enter bootloader mode. |
| JP5 | NC (connected) | When shorted, it connects the GPIO0 pin to a 100pF capacitor which provides more stable voltages. |
| JP6 | Connected to IO34 by default | Switch between connecting the INTB pin of the IO expander to the IO34 pin of the ESP32 or to the IO14 user-accessible pin. |
| JP7 | NC (connected) | When shorted, provides 3.3V to the MicroSD card through the IO expander. |
| JP8 | NC (connected) | When shorted, it connects the battery terminal to MCP73831. |
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