FN-M16P serial MP3 module pinout

The FN-M16P plays MP3 and WAV files from microSD or USB storage. The board provides a serial command port, stereo DAC outputs and an amplified mono speaker output.

Flyron FN-M16P, 16 contacts

16 contacts Current package

Flyron Technology · Two rows of eight contacts surrounding the microSD slot.

Flyron FN-M16P, 16 contacts pinout

Flyron FN-M16P, 16 contacts

Component-side view with the microSD card opening at the bottom. VCC (1) is upper left and BUSY (16) is upper right. Scroll the map to reach all contacts.

Selected pin details

13 · ADKEY2

Input · Inputs

Analog key input for the second trigger bank.

Flyron FN-M16P data sheet V1.0, § 2, pin map and table

Electrical limits · Link to this pin

All 16 pins

Pin	Signal	Direction	Function
1	VCC Supply	Supply	Module power input. Use 3.3–5.0 V per the operating specification.
2	RX Input	Input	3.3 V UART input. Connect to host TX.
3	TX Output	Output	3.3 V UART output. Connect to host RX.
4	DAC_R Output	Output	Right audio DAC output for an earphone or an external amplifier.
5	DAC_L Output	Output	Left audio DAC output for an earphone or an external amplifier.
6	SPK (6) Output	Output	One half of the floating speaker pair. The polarity labeling differs between the diagram and the table.
7	GND Return	Return	Common return. Connect every GND contact.
8	SPK (8) Output	Output	The other half of the floating speaker pair. The polarity labeling differs between the diagram and the table.
9	IO1 Input	Input	Short press selects the previous track. Long press reduces volume.
10	GND Return	Return	Common return. Connect every GND contact.
11	IO2 Input	Input	Short press selects the next track. Long press raises volume.
12	ADKEY1 Input	Input	Analog key input for the first trigger bank.
13	ADKEY2 Input	Input	Analog key input for the second trigger bank.
14	USB+ Bidirectional	Bidirectional	USB D+ for the documented host or device circuit.
15	USB− Bidirectional	Bidirectional	USB D− for the documented host or device circuit.
16	BUSY Output	Output	Low during playback. High in standby.

Signal assignments

Serial playback control

Use 3.3 V UART at 9600 bit/s. Each checksummed command starts with 0x7E and ends with 0xEF. BUSY gives a separate playback indication.

Floating mono speaker output

Connect a single speaker across contacts 6 and 8. Both contacts are driven by the amplifier.

Stereo DAC output

Use the DAC outputs for the two channels of a ground-referenced external amplifier.

Electrical limits

Parameter	Limit	Conditions and source
Operating supply3.3–5.0 V	3.3–5.0 V	Nominal 4.2 V in the technical-parameter table. The circuit uses regulated 5.0 V with separate 3.3 V serial logic. Flyron FN-M16P data sheet V1.0, § 1.3
Speaker load4 Ω or 8 Ω	4 Ω or 8 Ω	Use a speaker rated 3 W. The fixture uses 8 Ω at low volume. Flyron FN-M16P data sheet V1.0, §§ 1.2, 2 and 5

Models and documents

This map follows the 16-contact Flyron FN-M16P board in the manufacturer PDF. Identify the FN-M16P board marking and the two eight-contact rows before using the map.

Flyron FN-M16P: The 16-contact microSD module shown in the Flyron data sheet.

Flyron FN-M16P data sheet V1.0· Flyron original PDF download. Contact assignments, packet format, volume, named-folder playback and speaker connection.