EH H-MB05 5 FCC ID:2ACCRMB B05 Audio Mo Blue etooth® ® Techno ology A odule • Bluetooth radiio - Fully embedd ded Bluetootth® v3.
B Bluetooth Aud dio Module 1. Conte C nts 1. Des scription .............................................................................................................................................................4 2. App plication .............................................................................................................................................................4 3. EH--MB05 Product numberring .................................................................................
B Bluetooth Aud dio Module 9.2. 10. Matching network in fre ee space ............................................................................................................... 255 R Reflow Profille................................................................................................................................................... 26 6 2. Table T of Tables TABLE 1:: RECOMMEND DED OPERATIING CONDITIO ONS .....................................................................................
B Bluetooth Aud dio Module 1. De escriptio on The EH H-MB05 is a an easy to use u Bluetoo oth module, compliant with w Bluetoo oth v3.0+ED DR. The module e provides ccomplete RF F platform in a small fo orm factor. H-MB05 ena ables electro onic devicess with wirele ess connecttivity, not requiring any y RF The EH experie ence or expe ertise for inttegration intto the final product. p The EH-MB05 5 module, being a certified d solution, o optimizes the time to market m of the e final appliccation.
B Bluetooth Aud dio Module 4. Ele ectrical Charactteristic 4.1. Recomm mend ope eration condition c ns Operating Con ndition Min Typica al Max x Unitt Stora age Temperrature -40 -- +105 5 °C Operrating Temp perature Ra ange -40 -- +85 5 °C PIO Voltage V +1.7 +3.3 +3.6 6 V AIO Voltage V +1.42 +1.5 +1.5 57 V VDD Voltage +2.7 +3.3 +3.6 6 V RF frrequency 2400 2441 2480 00 MHzz Table 1: Recom mmended Op perating Conditions 4.2.
B Bluetooth Aud dio Module Note : c depends on the firmware e used. Typiccal values arre shown in tthe table. Power consumption (a) Sniff mode m ----- In Sniff mode, the t duty cyclle of the slavve’s activity in n the piconett may be red duced. If a slave is in active mode on an AC CL logical transport, it sha all listen in evvery ACL slo ot to the master traffic, hat link is be eing treated as a a scatter net n link or is absent due to t hold mode e.
B Bluetooth Aud dio Module VIL inp put logic leve el low VIH inp put logic level high 0.7VDD Input Leakage C Current GND < VIN < VDD(a) -1 CI Inpu ut capacitan nce 2.5 Outpu ut Voltage L Levels to Correctly C Te erminated USB Cable e VOL output logic le evel low 0.0 VOH ou utput logic le evel high 2.8 - 0.3VDD - V V 1 - 5 10.0 μA pF - 0.2 VDD V V Tab ble 5: USB Terminal T (a) Inte ernal USB pull-up dissable 4.5.1.
B Bluetooth Aud dio Module 4.5.2. Internal C CODEC Dig gital to An nalogue Converter Conditiions Parrameter Min Typ Max Unit Resolu ution - - 16 Bits Output Sample Ra ate, Fsample 8 - 48 kHz -24 4 0 95 95 95 95 95 95 95 - 21.5 -21 - 750 - 16 6 - - OC 500 0.01 dB dB mV rms Ω pF % THD+N N 16Ω load - - 0.
B Bluetooth Aud dio Module 5. Pin nout and d Termin nal Desc cription 5.1.
B Bluetooth Aud dio Module 12 PIO0 13 PIO1 14 PCM_IN 15 GND 16 PCM_SYN NC 17 RF_GND D 18 RF_IN 19 RF_GND D 20 PCM_CLK K 21 Bi-directional with h programmable strrength interna al pull-up/do own Bi-directional with h programmable strrength interna al pull-up/do own S Input, with h weak CMOS interna al pull-down n Program mmable inpu ut/output line e Program mmable inpu ut/output line e Synchron nous Data IInput Ground d Ground Bi-directional with h weak interna al pull-down n Synchr
B Bluetooth Aud dio Module 36 PIO4 Bi-directional with h programmable strrength interna al pull-up/do own 37 GND Ground d 38 UART_TX X 39 UART_RX X 40 PIO8 41 PIO7 42 PIO6 OS output, Bi-directional CMO tri-state e, with wea ak internal pull-up p CMOS S input with weak interna al pull-down n Bi-directional with h programmable strrength interna al pull-up/do own Bi-directional with h programmable strrength interna al pull-up/do own Bi-directional with h programmable strrength interna al pull-
B Bluetooth Aud dio Module 6.2. Reset The mo odule may be b reset fro om several sources: R RESETB pin n, power-on n reset, a UART U breakk charactter or via so oftware conffigured watcchdog timerr. The RE ESETB pin is an active low RESET TB and is in nternally filte ered using tthe internal low frequen ncy clock osscillator. A RESETB R will be perform med betwee en 1.5 and 4 4.0ms follow wing RESET TB being acttive. It is rec commended d that RESE ETB be app plied for a p period greater than 5ms.
B Bluetooth Aud dio Module 6.5. UART This is a standard d UART interface forr communiccating with h other seriial devices s. The UART interface provides p a simple me echanism fo or commun nicating wiith other se erial devices s using the e RS232 protocol. The UA ART CTS a and RTS signals s can n be used to t impleme ent RS232 hardware flow control where botth are activve low indicators.
B Bluetooth Aud dio Module Figure 4: Example E EE EPROM Connection with h I2C Interfa ace 6.6.1. Apple iOS S CP referrence desiign The figu ures below give an indicative overrview of wha at the hardw ware conce ept looks like e. A specificc MFI co-pro ocessor layo out is availa able for licensed MFI developers d ffrom the MF FI program. Figure 5: Apple Co-processor 2.0 0C Ehong Technology T Co o.
B Bluetooth Aud dio Module Figure 6: Apple Co-processor 2.0 0B 6.7. Digital A Audio Intterfaces The au udio interface circuit co onsists of: ■ Stereo audio codec ■ Dual audio o inputs and d outputs ■ A configurrable PCM, I²S or SPD DIF interface e Figure e 2 outlines th he functiona al blocks of the interface. The code ec supports stereo playyback and record ding of audio o signals at multiple sa ample rates with a reso olution of 16 6-bit.
B Bluetooth Aud dio Module PCM M Interface SPDIF Interface I²S Interfa ace PCM M_OUT SPDIF_ _OUT SD_OUT PCM M_IN SPDIF_ _IN SD_IN PCM M_SYNC - WS PCM M_CLK - SCK Ta able 11: Alte ernative Fun nctions of th he Digital Audio Bus Interface on the t PCM Inte erface The aud dio input cirrcuitry conssists of a du ual audio inp put that can n be configu ured to be either e single-e ended or fully differential and prog grammed fo or either miccrophone o or line input..
B Bluetooth Aud dio Module F Figure 8: Dig gital Audio Interface Mo odes Sym mbol tch c tcl topd o tssu s tsh s tisu tih Paramete er S SCK Frequency W Freque WS ency S SCK high time S SCK low tim me S SCK to SD_ _OUT dela ay W to SCK WS K set up tim me W to SCK WS K hold time S SD_IN to SCK set-up time S SD_IN to SCK hold tim me Ehong Technology T Co o., Ltd Min 80 80 20 20 20 20 Typical - Max 6.
B Bluetooth Aud dio Module Ta able 12 : Digittal Audio Inte erface Slave Timing T Figu ure 9: Digita al Audio Inte erface Slave e Timing Sym mbol topd o tspd s tisu tih Paramete er S SCK Frequency W Freque WS ency S SCK to SD_ _OUT dela ay S SCK to WS S delay S SD_IN to SCK set-up time S SD_IN to SCK hold tim me Min 20 10 Typical - Table 13: Digital Audio Inte erface Maste er Timing Ehong Technology T Co o., Ltd Max 6.
B Bluetooth Aud dio Module Figurre 10: Digita al Audio Inte erface Maste er Timing 6.7.3. IEC 60958 8 Interface e (SPDIF) Through AT+ com mmand to switch if SPD DIF is used.The IEC 60 0958 interfa ace is a digiital audio interfa ace that use es bi-phase coding to minimise m the e DC conten nt of the transmitted sig gnal and allowss the receive er to decode e the clock in nformation from f the tran nsmitted sig gnal.
B Bluetooth Aud dio Module Figure 12 2: Example Circuit for S SPDIF Interfface (Optica al) 6.8. Microph hone inpu ut Figure 13 3: Micropho one Biasing (Single Cha annel Shown n) The aud dio input is intended fo or use in the e range from m 1μA @ 94 4dB SPL to about 10μA A @ 94dB SPL. With W biasing resistors R1 and R2 eq qual to 1kΩ Ω, this requirres microph hones with sensitivity s between about –40 0dBV and –60dBV. – The micropho one for each h channel sh hould be bia ased as shown in Figure 14 4. 6.
B Bluetooth Aud dio Module Figurre 15: Speak ker output 6.10. USB This is a full speed d (12M bits s/s) USB interface for communica ating with other o compa atible digital devicess. The mod dule acts as a a USB peripheral, p responding g to requesst from a master m hostt controller, such as a PC. The US SB interface e is capable of driving a USB cable e directly. No N external USB transcceiver is required d.
B Bluetooth Aud dio Module Note: USB_ON N is only use ed when the firmware f nee ed an input to o detect if US SB is conneccted and the USB function shall be ena abled. In such case it is shared s with th he module PIO P terminalss. If detection n is not w USB, suc ch as USB DFU D or USB CDC), USB_ _ON is not ne eeded. needed (firmware alrready runs with 7. EH H-MB05 Referen R ce Design Figure 17: Referen nce Design Ehong Technology T Co o.
B Bluetooth Aud dio Module 8. Me echanica al and PCB P Footprint Characteristics Fig gure 18: Rec commended d PCB Moun nting Pattern n (Unit: mm, Deviation:0.02mm)TO OP View 9. RF F Layoutt Guidelines EH-MB05 has an o on-board PC CB antenna a. PCB desiign to ensurre enough cclearance area of antenna a, area leng gth is 1.6 tim mes of antenna length, area width is 4 times of o antenna width, the bigger the t better if the space allows. a The e specific sizze as shown figure below.
B Bluetooth Aud dio Module Figure 19: Clearance area a of antenna 9.1. Feed Line and Antenna A The imp pedance of the feed lin ne between the RF porrt and the an ntenna shalll be 50Ω. A good g ground d directly un nder the fee ed line is alw ways neede ed for imped dance contrrol. Route the feed d line as curve lines wh hen needed d, avoid 90 or o even lesss degree an ngles style. The e width of th he feed line e, the distan nce of the fe eed line to th he ground p plane are ke eys to the imp pedance.
B Bluetooth Aud dio Module Figure 20: Antenna refference des sign 9.2. Matchin ng netwo ork in free space The spe ecs of a Fra actus standard antenna a are measured in theiir evaluation n board (in free space)), which iss an ideal case. In a re eal design, components c s nearby the e antenna, semiconductors, LCD’s, batteries, covers, c conn nectors, etcc affect the a antenna performance.
B Bluetooth Aud dio Module 10. Reflow Profile The soldering proffile dependss on variouss parameterrs necessita ating a set u up for each application n. or guidance on solder reflow. r The datta here is giiven only fo ℃ 250 217 210 A 25 0 B 1 2 C 3 D 4 E 5 6 min n Figure F 22: Recommende R ed Reflow Profile P Pre-hea at zone (A A) — This zone raises the temperrature at a controlled rrate, typica ally 0.5 – 2 C/s.
B Bluetooth Aud dio Module 11. Coontact Infoormation s k.com.cn Sales: sales@ehlin Technic cal support: support@eh s hlink.com.cn n Phone: +86 21 64769993 Fax: +86 21 647658 833 Street address: a Rom m1505, Blk 1st ,No.833 South Hong g mei Rd ,M Ming hang dis strict shangh hai Note: FCC RF exp posure requirements 1. Radia ated transm mit power must be equa al to or lowe er than that specified in n the FCC Grant G of Equip pment Authorization for FCC ID:2A ACCRMB05 5. 2.
B Bluetooth Aud dio Module For porrtable device es, in addition to the co onditions 1 through 5 described d above, a sep parate approva al is require ed to satisfy the SAR re equirementss of FCC Pa art 2.1093 If the de evice is use ed for other equipment that separa ate approva al is required d for all othe er operatin ng configura ations, inclu uding portab ble configurrations with respect to 2.1093 and d different antenna a configurattions.
B Bluetooth Aud dio Module the equ uipment off and a on, the user is enccouraged to o try to corre ect the interrference by one or more off the following measure es: —Reorient or reloccate the recceiving ante enna. —Increase the sep paration bettween the equipment e a and receiverr. —Conn nect the equ uipment into o an outlet on o a circuit different d fro om that to w which the rec ceiver is connected. —Conssult the dealler or an experienced radio/TV r tecchnician forr help. Ehong Technology T Co o.