494 Tiny Whisper
494 : Tiny Whisper
- Author: Simon Dorrer, Jonathan Hager, Matthias Jung, Harald Pretl
- Description: This chip implements a transmitter for the wireless long-reach protocol called WSPR (weak signal propagation reporter) in the shortwave frequency range (3 MHz to 30 MHz), containing a CORDIC, a DS-Modulator, and LO Generation (digital core), as well as an analog IQ Modulator.
- GitHub repository
- Open in 3D viewer
- Clock: 56000000 Hz
How it works
ToDo (see https://github.com/iic-jku/TinyWhisper)
How to test
ToDo (see https://github.com/iic-jku/TinyWhisper)
External hardware
List external hardware used in your project (e.g. PMOD, LED display, etc), if any
- SPI Master
- UART to USB Breakout Board
- RF Power Amplifier + Filters + Antenna
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | LO_QX_i | ||
| 1 | LO_Q_i | ||
| 2 | LO_IX_i | ||
| 3 | LO_I_i | ||
| 4 | afe_en_i | ||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | A0 | 0 | vout_RF |
| 1 | A4 | 4 | vinn_Q |
| 2 | A1 | 1 | vinp_Q |
| 3 | A3 | 3 | vinn_I |
| 4 | A2 | 2 | vinp_I |