Elements of the PCB

Top side

1. UP button: In tunning mode, press this button to start scanning with 25kHz increments. At the memory manager mode, push this button to increment the memory slot position.

2. DOWN button: In tunning mode, press this button to start scanning with 25kHz decrements. At the memory manager mode, push this button to decrement the memory slot position.

3. VOLUME + button: In tunning mode, press this button to increase the volume level. In memory manager mode, press this button to save the current station into the selected memory slot.

4. VOLUME - button: In tunning mode, press this button to decrease the volume level. In memory manager mode, press this button to load the station stored in the selected memory slot.

5. MEM button: Push this button to open or close the memory manager. In memory manager mode, the seven-segment display indicates the memory slot number with the prefix S (for example, S 1 indicates the 1st slot of the memory manager).

6. FM stereo indicator.

7. Memory manager indicator. This indicator got activate if the current station is store in the memory manager.

8. Seven-segment display to indicate the tuner frequency, volume level, and memory-manager functions.

Bottom side

9. Connector to attach an external wire antenna.

10. Firmware upload jumper. (Refer Firmware section of this documentation for more details.)

11. Connector to provide 5V to 9V DC input.

12. Stereo audio output terminal.

13. In-circuit programming port to attach the ST-LINK/V2 USB debugger/programmer. (Refer Firmware section of this documentation for more details.)