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?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 1 o f 12 1 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 product specification 15mm x 27mm description one of the m o st capa ble b l uetooth m o d u les availabl e , the BT-21 bl uetooth oem modul e is desig ne d for maximum flexibility. the BT-21 module inclu d e s 14 gene ral p u rp ose i nput/out put line s , se veral seri al interfa c e option s , anal og-to -digital i nputs, an d up to 2m bps da ta throug hput . the BT-21 i s a su rface m ount pcb mo dule that p r o v ides fully e m bed ded, rea d y to use bluetooth wirele ss tech n o logy. the reprogramma ble flash memo ry co ntains emb edd ed firm wa re f o r se rial cabl e repl aceme n t usin g the bluetooth spp pr ofile. other popular bluet ooth pr ofiles , s u ch as obex, ar e also avail able . cu stomi z ed fi rmware for p e rip heral devi c e inte ra ction , powe r o p timization, se cu rity, and other prop ri etary feature s may be suppo rted and can be ord e re d pre-l oade d and co nfigured. additional documentation ? bt hard w a r e design g u ide ? abserial us e r guide ? abserial re ferenc e guid e features ? bluetooth radio - fully embed d ed bluetooth v2.0 serial profile - cla ss 2 radi o - com p lete rf ready mod u l e - wir e le ss d a ta commu nic a tions - integrate d chi p antenn a - 128 -bit en cry p tion se cu rity - ran ge up to 30m los - fcc & bluetooth qualified ? st micro arm7 micropro cess or up to 50mhz ? memor y - 256k bytes fl ash m e mo ry - 64k bytes ra m memory ? da ta r a te - 2m bp s maximum data rate - multipoint ca pability ? serial interfa ce - uart, up to 480k ba ud (u p to 3.25m ba ud on bt21.2 ) - buffered spi interface - i2c interface - usb v2.0 ? general i/o - 14 gen eral pu rpo s e i/o - 4x12-bit a/d inputs ? use r inter f ac e - a t comma nd set
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 2 o f 12 2 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 software architecture lo w e r lay e r stack ? f u ll bluet oot h v2. 0 dat a rat e ( 3 m bps ma xim u m) ? device p o w e r modes? a ct ive , sleep an d de ep sle e p ? wake on blu e t oot h f eat ur e?opt imize d po wer consum pt io n of host cpu ? aut hent ic at ion and e n cr ypt i o n ? encr ypt i o n ke y lengt h f r om 8- bit s t o 128-b i t s maximum ? persist ent f l a s h memor y ?f or bd address and ra dio p a ra met e r st orage ? all acl (as y nc hron ous c o n n e c t i on l e ss) p a c k et t y p e s (dm1 , dh1, dm3, dh3, dm5, dh 5, 2-dh1, 2-d h 3, 2-dh5, 3- dh1 3-d h 3, 3- dh5, au x1) ? sco (synchro nous co nnect i on orient ed) p a cket t y pes (h v1, hv2, hv3) ? point t o mult ip oint an d scat t e rnet supp ort ? 3 mast er and 7 slave links allo w e d ( 10 act i ve links sim u lt ane ousl y ) ? park, sniff, and hold modes?f ull y supported to maximum al l o w ed intervals ? mast er slave s w it c h ?sup port ed dur ing co nn ect i on a n d p o st connect i on ? dedic a t ed i n q u i r y access co d e ?f or improve d inqu ir y sca n perf o rma n ce ? d y namic p a ck et select io n?c han nel q ual it y driven dat a rat e t o opt i mize link perf o rman ce ? d y namic p o w e r cont rol?int e rf erence re duct i on an d link p e r f ormance ? bluet o o t h t e st modes? per bl uet oot h v2. 0 specif icat i o n ? 802. 1 1b co-e xi st ence?awma and af h ? vend or specif i c hci comman d s?t o supp ort device c o nf ig ur at ion a nd cert if icat ion t e s t modes uppe r la y e r stack ? spp, obex , sdap, gap, and dun protoc o l s ? rf comm, sdp, and l2cap supp ort e d hci inte rfa c e ? bluet o ot h v2. 0 specif icat i o n c o mpli ant ? hci uart t r an sport la yer (h4 ) ? f i rm w a r e up gr ade ov er uar t applica tions arm7 cpu events commands flash memor y upper la yer st ack hci hci st ack lm baseband rf
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 3 o f 12 3 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 hardware specifications ge n e r a l co nd i t i ons ( v in = 3 . 0 v an d 25 c) rec o mmend ed oper atin g condition s absolu te ma ximum ratin g s curr ent con s umption ra t i ng min ty pical m ax uni t o per ati ng t e m p e r atu r e r a n g e -20 - 80 c s upply v o lta g e v in 2.8 3.0 3.4 vo l t s si g n a l pi n vo l t a g e - 3.0 - vo l t s r f f r equ en cy 24 00 - 24 83. 5 mhz ra t i ng min ty pical m ax uni t st o r ag e t e m p er a t u r e ra ng e -55 - +150 c s upply v o ltage, v in -0. 3 - + 3. 6 vo l t s i/o pi n v o lta ge, v io -0. 3 - + 4. 0 vo l t s r f inpu t p o w e r - - -5 db m m o d es a v g u n it t y p i c a l po w e r cons umpt i on a c l dat a 11 5k b a u d u a r t at m a x thr o u g h p u t (m ast e r) 35. 0 ma a c l dat a 11 5k b a u d u a r t at m a x thr o u g h p u t (s l a v e ) 35. 0 ma c onn ec tio n , no d a t a t r af fic , m a st er 16. 0 ma c onn ec tio n , no d a t a t r af fic , s l av e 24. 0 ma c onn ec tio n i n sni f f (t s n iff= 10 0ms ) , no da ta tra ffi c, m a ste r 8.0 ma c onn ec tio n i n sni f f (t s n iff= 10 0ms ) , no da ta tra ffi c, sla v e 8.4 ma c onn ec tio n i n sni f f (t s n iff= 37 5ms ) , no da ta tra ffi c, m a ste r 2.0 ma c onn ec tio n i n sni f f (t s n iff= 37 5ms ) , no da ta tra ffi c, sla v e 2.5 ma s t and by , w i thout de ep sl ee p 14. 0 ma s t and by , w i th dee p s l e e p 0.1 1 ma p age/ in qui ry sca n , d e e p s l e e p 1.4 ma
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 4 o f 12 4 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 i/o operatin g char acteri s tics selecte d rf char ac teris t ics p a rame te rs condi t i ons bt s p ec ty pical uni t an t e nn a l o a d 50 ohm r a d i o r ece i v er s ensi t iv it y lev e l b e r < .001 w i th d h 5 -7 0 -84 db m ma x i mu m u s ab le le v e l b e r < .001 w i th d h 1 -2 0 -9 db m inp u t v s w r 2.5 : 1 ra di o t r a n s m i t t e r m a x i m u m outp u t pow er 50 ? lo ad -6 t o + 4 +5 db m init ial car r ie r f r e q u e n cy t o ler a n c e 7 5 0 kh z 20 db b a n d w i dth f o r m o d u la te d c a r r i e r 10 00 93 2 kh z sy m b o l p a rame te r min m ax uni t condi t i ons v il low -lev el in pu t v o lt ag e - 0.9 vo l t s v in , 3.0v v ih h i gh- lev el i n p u t v o lta g e 2.1 - vo l t s v in , 3.0v v ol low -lev el o u t put v o lta g e - 0.4 vo l t s v in , 3.0v v oh h i gh- lev el o u t p u t v o lta g e 2.2 - vo l t s v in , 3.0v i ol low -lev el o u t p u t c u rr en t - 4.0 ma v = 0.4 v ol i oh h i gh- lev el o u t p u t c u rr en t - 4.0 ma v = 2.2 v oh r pu p u ll- up r e si st or 80 12 0 k ? r e si sto r t u r n e d o n r pd p u ll- dow n r e s i st o r 80 12 0 k ? r e si sto r t u r n e d o n
?2008 amp?ed rf inc 1722 ringwood ave, suite 250, san jose, ca 95131, usa BT-21 datasheet 9/29/08 www.ampedrf.com page 5 of 12 5 amp?ed rf, inc. (phone) 408 213-9530 ( fax ) 408 213-9533 pin assignment name type pin # description alt function uart interface rxd i 8 receive data txd o 6 transmit data cts i 9 clear to send (active low) rts o 10 request to send (active low) reserved ? available on bt21.2 boot 0 i 2 boot loader (active high) gpio [11] i/o 11 general purpose input/output gpio [12] i/o 12 general purpose input/output power and ground v dd 24 v dd gnd 23 gnd reset resetn i 3 reset input (active low for 5 ms); gpio ? general purpose input/output gpio [0] i/o 16 general purpose input/output spi miso gpio [1] i/o 17 general purpose input/output spi mosi gpio [2] i/o 19 general purpose input/output spi ss gpio [3] i/o 1 general purpose input/output spi clk gpio [4] i/o 18 general purpose input/output uart 2 rxd gpio [5] i/o 20 general purpose input/output uart 2 txd gpio [6] i/o 22 general purpose input/output adc 0 gpio [7] i/o 13 general purpose input/output adc 1 gpio [8] i/o 4 general purpose input/output adc 2 gpio [9] i/o 7 general purpose input/output adc 3 gpio [10] i/o 5 general purpose input/output gpio [13] i/o 15 general purpose input/output gpio [14] i/o 14 general purpose input/output gpio [15] i/o 21 general purpose input/output
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 6 o f 12 6 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 BT-21 dra w i ng
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 7 o f 12 7 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 hardware bl ock di agram b a tte ry or su pp ly stlc2500c arm mc u uart 2.75 v bp f ilter gp io 256k/f lash 64k/ram spi uart ro m ram b t stac k up to h c i - a b s er ial / a p p licatio n - g a p , sp p, dun , obex - sdp/ rfcomm - l 2 c a p 2.75 v res e t bt _ w a k eup regulator 26 m h z cr y s t a l bt -21 b l u eto o t h mo du l e bl ock di ag ra m
?2008 amp?ed rf inc 1722 ringwood ave, suite 250, san jose, ca 95131, usa BT-21 datasheet 9/29/08 www.ampedrf.com page 8 of 12 8 amp?ed rf, inc. (phone) 408 213-9530 ( fax ) 408 213-9533 hardware design amp?ed rf modules support uart, usb, spi, and gpio hardware interfaces. note that the usage of these interfaces is dependant upon the firmware that is loaded into the module, and is beyond the scope of this document. notes ? all unused pins should be left floating; do not ground. ? all gnd pins must be well grounded. ? the area around the module should be free of any ground planes, power planes, trace routings, or metal for 8 mm from the antenna in all directions. ? traces should not be routed underneath the module. module reflow installation the BT-21 is a surface mount bluetooth module supplied on a 24 pin, 6-layer pcb. the final assembly recommended reflow profiles are: for non pb-free applications, sn63pb37 solder is recommended. ? maximum peak temperature of 208 - 210c (below 220c). ? maximum rise and fall slope after liquidous of < 2c/second. ? maximum rise and fall slope after liquidous of < 2c/second. ? maximum time at liquidous of 50 ? 90 seconds. for rohs/pb-free applications, sn96.5 /ag3.0/cu0.5 solder is recommended. ? maximum peak temperature of 230 - 240c (below 250c). ? maximum rise and fall slope after liquidous of < 2c/second. ? maximum rise and fall slope after liquidous of < 3c/second. ? maximum time at liquidous of 40 ? 80 seconds.
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 9 o f 12 9 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 gpio interface all gpios are cap able of sin k ing a nd sourcin g 4ma of i/o current. gpio [0] to gpio [7] are internally pulled do wn with 10 0k ? (nomin al) re si stors gpio [8 ] to gpio [15 ] are inte rn all y pulled up wi th 100k ? (nomi nal ) re si stors. ua rt int e rf a ce the ua rt is com patible wi th the 16550 i ndu stry st an d a rd. fou r si g nals a r e p r ovi ded with the uart interfa c e. the txd and rx d pin s are used for dat a while the cts and rts pins are u s ed for flow cont rol. connection to host device amp?ed rf module host rxd r ts cts txd rxd txd cts r ts
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 10 of 12 10 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 amp? ed rf module typical rs23 2 circuit
?2008 a m p ? ed r f inc 1722 ring w ood ave, suite 250, san jose, ca 95131, usa BT-21 d a tasheet 9/29/08 www.amped rf.co m page 11 of 12 11 amp?e d rf, inc. (phone) 408 213 - 9530 ( fa x ) 408 213- 9533 pcb lay out guidelines
?2008 amp?ed rf inc 1722 ringwood ave, suite 250, san jose, ca 95131, usa BT-21 datasheet 9/29/08 www.ampedrf.com page 12 of 12 12 amp?ed rf, inc. (phone) 408 213-9530 ( fax ) 408 213-9533 fcc regulatory compliance this module has been tested and found to comply with the fcc part15 rules. these limits are designed to provide reasonable protection against harmful interfer ence in approved installations. this equipment generates, uses, and can radiate radi o frequency energy and, if not installed and used in accordance the instructions, may cause harmful interference to radi o communications. however, there is no guarantee that interference will not occur in a particular installation. this device complies with part 15 of the fcc rules. operation is subject to the following two conditions: (1 ) this device may not cause harmful interference, and (2) this device must accept any interference receiv ed, including interference that may cause undesired operation. modifications or changes to this equipment not expressly approved by amp?ed rf may void the user?s authority to operate this equipment. modular approval fcc id: wdtbtmod2 in accordance with fcc part 15, the BT-21 is listed above as a modular transmitter device. fcc label instructions the outside of final products that contain a BT-21 dev ice must display a label referring to the enclosed module. this exterior label can use wording such as the following: ?contains transmitter module fcc id: wdtbtmod2 or ?contains fcc id: wdtbtmod2. any si milar wording that expresses the same meaning may be used.

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