wiring st25r3916b spi
Signal connections for the seven-pin module in the V0.3 Draft datasheet.
Applies to: V0.3 Draft, 2026-07-18; not the Mini module or the chip package. Confirm connector orientation against the original board drawing.
Using this exact ELECHOUSE module in its documented default SPI mode.
IRQ is additional to the four SPI signals.
| Contact | SPI signal | Host connection |
|---|---|---|
| 1 | IRQ | Interrupt input |
| 2 | CS / BSS | Chip-select output |
| 3 | SCLK | SPI clock |
| 4 | MOSI | MOSI |
| 5 | MISO | MISO |
| 6 | 5V | Module supply |
| 7 | GND | Ground |
- Match the seven-pin board and default SPI configuration.
- Use the module's supported library and its documented startup sequence.
- The 5V label does not make the signals 5 V tolerant.
- ST25R3916B NFC Module — original images and datasheets
Source documents inspected; independent electrical and bench review pending. Reviewed 2026-09-27.
- ELECHOUSE ST25R3916B module, V0.3 Draft — Page 4: seven-pin connector, power and SPI/I2C mode selection; checked 2026-09-27
- Analog Devices: Introduction to SPI Interface — Interface, signal direction and CPOL/CPHA table; checked 2026-09-27
Original writing and diagram by Kal / Valleytech Solutions, CC BY 4.0. Manufacturer artwork and documentation retain their own rights.
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