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1. U SD SPI 100K HERES Se 18 Loop __ Se K17 Pause Pla _ 16 Pre Vol 24K 15 Next Vol 15K K14 Segment 4 K13 Segment 3 K12 Segment 2 H K11 Segment 1 A Figure 3 3 ad key refer Key Short Push Long Push Description K1 Play Mode Switch to interrupt non interrupted K2 Playback device switches U TF SPI Sleep K3 Operating Mode cycle K4 Play Pause K5 Previous Vol K6 Next Vol K7 4 pad Long push always to repeat play K8 3 ped Long push always to repeat play DFPLayer Mini K9 2 a Long push always to repeat play K10 1 1 Long push always to repeat play K11 5 jin Long push always to repeat play K12 6 2 Long push always to repeat play K13 7 ped Long push always to repeat play K14 8 pou Long push always to repeat play K15 9 pex Long push always to repeat play K16 10 eon Long push always to repeat play K17 11 li Long push always to repeat play K18 12 Long push always to repeat play 19 13 Long push always to repeat play K20 14 n Long push always to repeat play 4 Application Circuit 4 1 Serial Communication Connect Module s serial port is 3 3 V TTL level so the default interface level is 3 3V If the MCU system is 5V It is recommended connect resistor in series Segment 5 3 3 5 vec 3
2. 1 vec BUSY ES 2 RX USB RX 3 Tx USB CU 3 DACR ADKEY2 M 5 2 DACL ADKEYI 6 SPK1 102 11 aND GND ex sPK2 101 DFPLAYER MINI Speaker Figure 4 1 Serial Connect 3 3V DFPLayer Mini Figure 4 2 Serial Connect 5v 4 2 Other Refer Diagram VCC 3 3 5V 1 Segmennt 5 Segmennt 1 Pre Vol Next Vol DFPLAYER MINI Figure 4 3 headset connect module Between the headset and the module can string a 100 resistor make a limiting DFPLAYER MINI Figure 4 4 speaker connect module DFPLayer Mini ADKEY2 ADKEY 102 GND Kl Speaker 200K m Play Mode 10 FL E Bk H DFPLAYER MINI E B Tr s Lep Al Sy Moe Eri 33K S o Phy M uw Ks 0 4 UK e Nati KI N s ES E mmi n 62 o Sementi x TH 18 v Sement Figure 4 5 Ad key connect refer S MP3 TF 16P Size unit mm R i 1 200K zi Segment 14 RIP i 100K m Seement 13 3IK Seoment 12 RU K 3K i Seoment 11 m Sement 10 Mu 15K Seement 9 Ri 2 11 i 9 1K Seement 5 RB L 62K Segment tt n 12 28 rj X ri Seoment 6 Bie OK Seoment 3 Figure 5 1 pcb size DFPLayer Mini 6 Note I O Input Specification Item Description Min Type Max Unit Test Condition VIL Low Level Input Voltage 0 3 0 3 VDD
3. DFPLayer Mini 1 Summary 1 1 Brief Instruction DFPLayer Mini module is a serial MP3 module provides the perfect integrated MP3 WMV hardware decoding While the software supports TF card driver supports FAT16 FAT32 file system Through simple serial commands to specify music playing as well as how to play music and other functions without the cumbersome underlying operating easy to use stable and reliable are the most important features of this module 1 2 gt gt Y VVVVVV m 3 VVVVVVVVVV V Features Support Mp3 and WMV decoding Support sampling rate of 8KHz 11 025KHz 12KHz 16KHz 22 05KHz 24KHz 32KHz 44 1 KHz A48KHz 24 bit DAC output dynamic range support 90dB SNR supports 85dB Supports FAT16 FAT32 file system maximum support 32GB TF card A variety of control modes serial mode AD key control mode The broadcast language spots feature you can pause the background music being played Built in 3W amplifier The audio data is sorted by folder supports up to 100 folders each folder can be assigned to 1000 songs 30 levels volume adjustable 10 levels EQ adjustable Application Car navigation voice broadcast Road transport inspectors toll stations voice prompts Railway station bus safety inspection voice prompts Electricity communications financial business hall voice prompts Vehicle into and out of the channel verify that the voice prompts The public security border control channel voice pr
4. V VDD 3 3V VIH High Level Input Voltage 0 7VDD VDD 0 3 V VDD 3 3V I O Output Specification Item Description Min Type Max Unit Test Condition VOL Low Level Output Voltage 0 33 V VDD 3 3V VOH High Level Output Voltage 2 7 V VDD 3 3V 1 The module s external interfaces are 3 3V TTL level so please note the level conversion during the hardware circuit design also in strong interference environment electromagnetic compatibility note some protective measures GPIO using opt coupler isolation increasing TVS etc 2 ADKEY key values are in accordance with the general use of the environment if the strong inductive or capacitive load environment please note that the module power supply is recommended to use a separate isolated power supply another matched beads and inductors for power filtering we must ensure that the input power as much as possible the stability and clean If you really can not be guaranteed please contact us to reduce the number of keys to redefine wider voltage distribution 3 For general Serial communication please pay attention to level conversion If strong interference environment or long distance RS485 applications then please note that signal isolation in strict accordance with industry standard design communication circuits
5. fifth segment 14 USB USB DP USB Port 15 USB USB DM USB Port 16 BUSY Playing Status Low means playing High means no Table 2 2 Pin Description DFPLayer Mini 3 Serial Communication Protocol Serial port as a common communication in the industrial control field we conducted an industrial level of optimization adding frame checksum retransmission error handling and other measures to significantly strengthen the stability and reliability of communication and can expansion more powerful RS485 for networking functions on this basis serial communication baud rate can set as your own the default baud rate is 9600 3 1 Serial Communication Format Support for asynchronous serial communication mode via PC serial sending commands Communication Standard 9600 bps Data bits 1 Checkout none Flow Control none Format S VER Len CMD Feedback paral para2 checksum 80 Each command feedback begin with that is 55 Start byte 0x7E Ox7E VER Version Version Information Len the number of bytes after Checksums are not counted CMD Commands Indicate the specific operations such as play pause etc Feedback Command feedback If need for feedback 1 feedback 0 no feedback paral Parameter 1 Query high data byte para2 Parameter 2 Query low data byte checks m Checksum Accumulation and verification not include start bit End bit End bit OxEF For example if we
6. 100 MP3 file serial port to send commands 7E FF 06 OF 00 01 64 XX Xx EF DH represents the name of the folder the default support for 99 documents become 01 99 named DL on behalf of the tracks the default maximum of 255 songs that 0x01 OxFF Please refer to the above set rules for setting tracks 3 to the standard of the module you must specify both the folder and file name to lock a file Individually specified folder or specify the file name alone is also possible but the document management will be worse 4 The following diagram illustrates both the folders and file names are specified DFPLayer Mini Ap 2014 4 9 15 03 n folder name reference 2014 4 9 15 00 bx 2014 4 9 15 00 1 log 2014 4 9 15 00 Xx 3 5 Key Ports We use the AD module keys instead of the traditional method of matrix keyboard connection it is to take advantage of increasingly powerful MCU AD functionality Our module default configuration 2 AD port 20 key resistance distribution if used in strong electromagnetic interference or strong inductive capacitive load of the occasion please refer to our Notes 1 Refer ADKEY1 2 20 function keys allocation table diagram R10 H name reference Figure 3 1folder name 2014 4 9 15 02 Ban 2014 4 9 15 03 Ba 2014 4 9 15 03 Sa Figure 3 2 file name K20 Play Mode ADKEY2 R20 200K se
7. commands sent by MCU and will also affect the normal initialization of the module 3 3 2 Returned Data of Track Finished Playing U Disk finish playback Ist track 7E FF 06 3C 00 00 01 xx xx EF U Disk finish playback 2nd track FF 06 3C 00 00 02 xx xx EF TF card finish playback 1st track FF 06 3D 00 00 01 xx xx EF TF card finish playback 2nd FF 06 3D 00 00 02 xx xx EF track Flash finish playback Ist track 7E FF 06 3E 00 00 01 xx xx EF Flash finish playback 2nd track FF 06 00 00 02 xx xx EF 1 module will enter into pause status automatically after being specified playing if customers need such application they can specify track to play the module will enter into pause status after finishing playing and wait for the commands sent by MCU 2 In addition we opened a dedicated I O as decoding and pausing status indication See Pin 16 Busy 1 Output high level at playback status 2 Output low level at pause status and module sleep 3 For continuous playback applications it can be achieved as below if it finishes the first tracking of the TF card it will return 7E FF 06 3D 00 00 01 xx xx EF 3D U disk command 00 01 expressed finished playing tracks If the external MCU receives this command please wait 100ms And then sending the playback command 7E FF 06 0D 00 00 00 FF EE EF because inside the module it will first initialize the next track information In th
8. ent EQ 0x45 Query the current playback mode 0x46 Query the current software version 0x47 Query the total number of TF card files 0x48 Query the total number of U disk files 0x49 Query the total number of flash files 0x4A Keep on 0x4B Queries the current track of TF card 0x4C Queries the current track of U Disk 0x4D Queries the current track of Flash 3 3 Returned Data of Module 3 3 1 Returned Data of Module Power on 1 The module power on require a certain of the time initialization this time is determined by U disk TF card flash etc device s file numbers general situation in the 1 5 3Sec If module initialization data has not been DFPLayer Mini sent out within the time indicating that the module initialization error please reset the module s power supply and detect hardware connecting 2 The module initialization data including online devices such as sending 7E FF 06 3F 00 00 01 xx xx EF DL 0x01 describe only the U disk online during power on Other data are seen as the table below U Disk on line FF 06 3F 00 00 01 xx xx EF Each device are or relationship TF Card on line 7E FF 06 3F 00 00 02 xx xx EF PC on line FF 06 00 00 04 xx xx EF FLASH on line FF 06 00 00 08 xx xx EF xx 7E FF 06 3F 00 00 03 xx xx EF 3 MCU will not send corresponding control commands until module initialization sending commands or the module will not process the
9. is case the module can be played continuously 4 If the currently finish playing the first song the track pointer automatically point to second song If you send a play the next command then the module will playback the third song And if the module finishes playing the last one the player will automatically jump to the first pointer and pause 5 After specifying device the module play pointer will point to device root directory of the first track and enters the pause state and wait MCU sending track playing command 3 3 3 Returned Data of Module Responds DFPLayer Mini FLASH finish play the 15 track 7E FF 06 3E 00 00 01 xx xx EF 1 in order to strengthen the stability of the data communication we have increased response processing ACKB byte is set whether need to reply to response So that to ensure each communication get handshake signals which will indicate the module has been successfully received data sent by the MCU and process immediately 2 For general applications customers can freely choose without this response processing is also ok 3 3 4 Returned Data of Module Error Module is busy FF 06 40 00 00 00 xx xx EF A frame data are not all received 7E FF 06 40 00 00 01 xx xx EF Verification error 7E FF 06 40 00 00 02 xx xx EF 1 In order to strengthen the stability of the data communication we added data error handling mechanism Module will responds informa
10. lease communicate with us in advance 1 For example select the first song played serial transmission section 7E FF 06 03 00 00 01 FF E6 EF 7E START command FF Version Information 06 Data length not including parity 03 Representative No 00 If need to acknowledge 0x01 need answering 0x00 do not need to return the response 00 Tracks high byte DH 01 Tracks low byte DL represented here is the first song played FF Checksum high byte E6 Checksum low byte EF End Command DFPLayer Mini 2 For selections if choose the 100th song first convert 100 to hexadecimal the default is double byte it is 0x0064 DH 0x00 DL 0x64 3 If you choose to play the 1000th first convert 1000 to hexadecimal the default is double byte it is 0 03 8 DH 0x03 DL 0xE8 4 And so on to the other operations as in the embedded area in hexadecimal is the most convenient method of operating 3 4 2 Commands of Specify Volume 1 Our system power on default volume is 30 if you want to set the volume then directly send the corresponding commands 2 For example specify the volume to 15 serial port to send commands 7E FF 06 06 00 00 OF FF D5 EF 3 DH 0x00 DL Ox0F 15 is converted to hexadecimal 0 000 can refer to the instructions of playing track section 3 4 3 Specify Device Play 1 The module default support four types of playback devices the device must be on line so it can
11. ompts Multi channel voice alarm or equipment operating guide voice The electric tourist car safe driving voice notices Electromechanical equipment failure alarm Fire alarm voice prompts The automatic broadcast equipment regular broadcast 2 Module Application Instruction 2 1 Specification Description Item Description 1 Support 11172 3 and 1SO13813 3 layer3 audio decoding MP3Format 2 Support sampling rate KHZ 8 11 025 12 16 22 05 24 32 44 1 48 3 Support Normal Jazz Classic Pop Rock etc UART Port Standard Serial TTL Level Baud rate adjustable default baud rate is 9600 Working Voltage DC3 2 5 0V Type DC4 2V Standby Current 20mA Operating 40 70 Temperature Humidity 5 95 Table 2 1 Specification Description DFPLayer Mini 2 2 Pin Description Figure 2 1 No Pin Description Note 1 Input Voltage DC3 2 5 0V Type DC4 2V 2 RX UART serial input 3 TX UART serial output 4 DAC_R Audio output right channel Drive earphone and amplifier 5 DAC_L Audio output left channel Drive earphone and amplifier 6 SPK2 Speaker Drive speaker less than 3W 7 GND Ground Power GND 8 SPKI Drive speaker less than 3W 9 101 Tisi gon Short n M r Aa long press 10 GND Ground Power GND T 102 Tage parte Short 2 press to 12 ADKEYI AD Port 1 Trigger play first segment 13 ADKEY2 AD Port 2 Trigger play
12. specify playback The software will automatically detect without user attention 2 Refer the table as below to select the appropriate command to send 3 Module will automatically enter the Suspend state after the specified device waiting for the user to specify a track playing It will take about 200ms from specifying device to the module initialize file information Please wait for 200ms and then send the specified track command Specify playback device U disk TE FF 06 09 00 00 01 xx xx EF xx XX Verification Specify playback device Card TE FF 06 09 00 00 02 xx xx EF Specify playback device SLEEP TE FF 06 09 00 00 05 xx xx EF 3 4 4 Specify File to Play Specify folder 01 of 001 mp3 7E FF 06 OF 00 01 01 xx xx EF Specify folder 11 of 100 mp3 FF 06 OF 00 OB 64 xx xx EF Specify folder 99 of 255 mp3 FF 06 OF 00 63 FF xx xx EF 1 Specify the folder playback is developed extensions default folders are named as 01 11 in this way because our module does not support Chinese characters identify the name of the folder name in order to stabilize the system switching speeds and songs under each folder default maximum support up to 255 songs up to 99 folders classification if customers have special requirements they need to classify according to the English name we also be achieved but name only is GUSHI and other English name 2 For example specify 01 folder
13. specify play NORFLASH you need t o send 7E FF 06 09 00 00 04 FF DD EF Data length is 6 which are 6 bytes FF 06 09 00 00 04 Not counting the start end and verification 3 2 Serial Communication Commands 1 Directly send commands no parameters returned CMD Function Description Parameters 16 bit 0x01 Next 0x02 Previous 0x03 Specify tracking NUM 0 2999 0x04 Increase volume 0x05 Decrease volume 0x06 Specify volume 0 30 0x07 Specify EQ 0 1 2 3 4 5 Normal Pop Rock Jazz Classic Base 0x08 Specify playback mode 0 1 2 3 Repeat folder repeat single repeat random DFPLayer Mini Specify playback 0x09 source 0 1 2 3 4 U TF AUX SLEEP FLASH 0x0A Enter into standby low power loss 0 0 Normal working 0x0C Reset module 0x0D Playback OxOE Pause OxOF Specify folder to playback 1 10 need to set by user 0x10 Volume adjust set DH 1 volume adjust DL set volume gain 0 31 0x11 Repeat play L start repeat play 0 stop play 2 Query the System Parameters Commands Function Description Parameters 16 bit 0x3C STAY 0x3D STAY Ox3E STAY Ox3F Send initialization parameters 0 OxOF each bit represent one device of the low four bits 0x40 Returns an error request retransmission 0x41 Reply 0x42 Query the current status 0x43 Query the current volume 0x44 Query the curr
14. tion after receiving error data format 2 In the case of relatively harsh environment it is strongly recommended that customers process this command If the application environment in general you no need handle it 3 The module returns busy basically when module power on initialization will return because the modules need to initialize the file system 3 3 5 Push in and Pull out information of Device Push in U disk FF 06 00 00 01 xx xx EF Push in TF card 7E FF 06 3A 00 00 02 xx xx EF Pull out U disk 7E FF 06 3B 00 00 01 xx xx EF Pull out TF card 7E FF 06 3B 00 00 02 xx xx EF 1 For the flexibility of the module we particularly add command feedback of push in and pull out device Let user know the working status of the module 2 When push in device we default playback the first track of device root directory as audition if users do not need this feature you can wait 100ms after receiving the message of push serial device and then send pause command 3 4 Serial Commands 3 4 1 Commands of Specify Track Play Our instructions are given in support of the specified track is playing the song selection ranges from 0 to 2999 Actually can support more because it involves the reasons to the file system support for the song too much it will cause the system to operate slowly and usually the application does not need to support so many files If the customer has unconventional applications p

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