User's Manual
Table Of Contents
- Figure 1. ST25R3916-DISCO board (top view)
- 1 Features
- 2 Description
- 3 Quick start
- 4 MB1396 hardware
- 5 MB1414 hardware
- 6 Schematics
- Figure 9. MB1396 - Overview
- Figure 10. MB1396 - Power
- Figure 11. MB1396 - MCU
- Figure 12. MB1396 - Energy harvesting measurement
- Figure 13. MB1396 - ST Link - JTAG
- Figure 14. MB1396 - LCD
- Figure 15. MB1396 - BLE and WiFi® modules
- Figure 16. MB1396 - Connectors
- Figure 17. MB1396 - USB
- Figure 18. MB1396 - Epaper connector
- Figure 19. MB1414 - Connectors
- Figure 20. MB1414 - ST25R3916
- Figure 21. MB1414 - Antenna and external load
- 7 Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements
- 8 Revision history
MB1414 hardware UM2358
12/31 UM2358 Rev 2
5 MB1414 hardware
5.1 ST25R3916
The ST25R3916 is directly connected to the filtered 5 V USB supply. There are additional
supply filtering components placed close to the NFC/HF reader IC.
During layout all decoupling capacitors have been
placed as close as possible to the
ST25R3916 chip.
To demonstrate the capacitive wake-up feature, two
capacitive sensing electrodes are
placed on the PCB.
For SPI cross-connecting another reader PCB, seri
al resistors can be removed and CN100
used.
By default, the SPI is the firmware and hardware access bus. The I2C bus can be used
instea
d by changing J200, J201, J202, J203, J204 and J205.
J206 makes it possible to bypa
ss the internal V
DD_RF
/ V
DD_AM
regulators when an output
current higher than 350 mA needs to be supported.
5.2 Antenna and matching network components
This board contains the matching network and the automatic antenna tuning capacitors
based on varicap.