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features demonstrates recommended layout and grounding arrangements c s 84 0 2 a ge n er a te s a e s/ e bu , s / pd i f, & e i aj - 34 0 c o mp a ti b l e di g it a l a ud i o buffered serial output interface digital and analog patch areas on-board or externally supplied system timing general description t h e cdb 5 33 0 a/ 3 1a ev a luatio n b oard is a n e xc e llent me a ns f o r qui c kly ev a luatin g t h e cs53 3 0a/31a 18 - b i t , stere o a/d c on v er t e r. e v alu a t i o n r e quire s a d igital si g nal pro c es s or, a low d istor t i o n a n alo g sig n al s o u r c e a n d a p o w er s u p p l y . a n alo g inp u t s are pro- vi d ed vi a rca c o nn e cto r s f o r b o t h c ha n nel s . als o in c lud e d i s a cs84 0 2a d igital a udi o i n t e rfa c e t r a nsmitter whic h ge n erates aes / ebu, s/pdif, a n d eiaj-34 0 c o mp a ti b le au d io d a t a . t he d igital a u dio d ata is a v aila b le via rca ph o no, an d o ptical c o nn e cto r s. t h e ev a luatio n bo a r d may a lso b e c o nfigure d t o ac c ept e x t e r n al timing s ign a ls for op e r a ti o n i n a us e r ap p lica- tion d u ri n g sy s t e m d ev e lop m e nt. ordering informa t i on: cdb53 3 0a, cdb 5 33 1 a evaluation board for cs5330a / cs5331a CDB5330A cdb5331a ana l og filter digital a u d io outp u t c s 8402a d igital audio i n t e r fa ce cs5330a/31a i / o f o r c l ocks an d d a t a cirrus logic, inc. crystal semiconductor product division p.o. box 17847, austin, tx 78760 (512) 445-7222 fax: (512) 445-7581 http://www.crystal.com oc t 9 7 ds 1 38 d b 2 17 copyright ? cirrus logic, inc. 1997 (all rights reserved)
cd b 53 3 0a / 31a system ov e r v iew th e cdb 5 33 0 a/3 1 a e v a lu a ti o n b oard is an ex- c e l l e n t mea n s of q u ic k ly e v a l ua t ing t h e cs 5 33 0 a/3 1 a. the cs 8 40 2 a d ig i tal a ud i o i n- t e rfa c e t ransmit t er p r o v i des a n e asy i nt e rfa c e t o d i gi t al a ud i o sig n al p roc e ssors, in c lu d ing t he ma- jority of digit a l au d io t e st eq u ipm e nt. the e v a lu a ti o n b o ard h as be e n d e s i gn e d to ac c ept a n a n al o g i n pu t , a nd p r o v i de a di g it a l o u tp u t t h at is e i th e r o p ti c a l or c oa x . t h e e v a l u a ti o n b o ard a l so a l l o ws the user to s u pp l y c lo c ks a n d d ata t h rou g h a 1 0 -p i n h e ad e r for system d e v e lo p m e n t. th e cdb 5 33 0 a/3 1 a sch e m a tic h a s b een par t i- tioned into 5 sch e mat i cs sh o w n in f ig u r e s 2 t h rou g h 6. each p a rti t io n e d s c hema t i c is re p re- sented in th e syste m diagra m sh o wn in figure 1. no t ice t hat t h e t h e s y s t em d ia g ram a l so i n cl u des t h e in t erco n ne c ti o ns be t w e en t h e part i ti on ed sch e m a ti c s. cs 5 33 0 a/ 3 1a ana l og to dig i tal c o n v ert e r a d e s c rip t ion of the c s53 3 0a/ 3 1a is i n c l ud e d in the cs5 3 30a / 31a d ata s h ee t . cs 8 40 2 a di g it a l au d io int e rf a ce fi g ur e 4 sh o ws t h e c s84 0 2a circuitry which imp l emen t s aes / ebu, s/ p di f and eiaj cp- 3 40 d i g it al a ud i o i n t e r f a c e st a nd a rds. t h e cs 8 40 2 a circ u i t is h ardware co n f i gured f o r c o n- sumer mo d e. sw2 p r o v i des 8 dip swi t che s t o sel e ct v ari o u s mo d es a nd bi t s fo r t h e cs8 4 02a, t ab l es 4-5. see th e cs8401a/cs8402 a data she e t f o r d e ta i led i n format i o n o n the o p era t ion of t h e c s84 0 2 a and the digita l audio standards. the op e rat i on o f t he cs8 4 02a and a disc u ssi o n of t he d ig i tal a ud i o in t er f a ce are i nc l ud e d in t h e 1 9 9 4 c r y s t al s e mic o nd u ct o r a u dio d a ta book . c s84 0 2a d a ta f o rmat the cs8 4 02a d ata format c a n be set wi t h jump- er s m0, m1, and m2. th e s e form a t s ar e sh o wn i n t h e c s84 0 2a d at a s h eet fo u n d i n the 1 9 94 crystal semiconductor a udio data book . the f o rm a t s e le c ted must be c o m p at i ble wi t h t h e cor- responding dat a f o r ma t o f t h e cs53 3 0 a /3 1 a sh o wn i n fi g u res 2 a nd 3 of t h e cs5 3 30a / 31a d a t a s h e e t . t h e d e f a u l t s e t t i n g s f o r m 0 - m 2 o n t h e e v alua t i o n b oa r d a r e g i v e n i n t a bl e s 2 a n d 3. the compa t ib l e d ata forma t s for t he cs8 4 02a a nd c s53 3 0a/ 3 1a ar e : c s84 0 2a format 1; c s53 3 0a c s84 0 2a format 4; c s53 3 1a an a l o g i npu t b u ff e r the r ec o mmen d ed i n pu t f i lt e r r eq u i r e d f o r t h e c s53 3 0a/ 3 1a has be e n c ombi n ed with a un i ty g a i n i n p u t b u f fer ( s e e f i g u r e 2) . t h e a n a l o g i n - p u t f i lt e r uses a mo t o ro l a m c 33 2 0 2 s i ngle su p p l y , du a l o p -amp. po w er supp l y c i r c uitry p o wer is s u pp l ied t o the e v al u at i on bo a r d b y t w o b in d ing p ost s (gnd, +5v), fig u re 6. the +5v i np u t su p pl i es p o wer t o t h e +5 v o lt d ig i tal cir- cuitry (v d +), an d t he + 5 v a n al o g circ u itry ( v a+). the an a log s u pp l y is d e r i ved fr o m t h e +5v b i nd i ng p o st t h rou g h a f e rrite be a d . inpu t /out p ut f o r c locks and data the e v al u at i on b o ard h a s be e n d esig n ed to al l o w t h e in t er f a c e t o e x t ern a l systems via the 10- p in c lo c k i / o h ea d e r , hd r 2. th i s h e ad e r a l l o ws t he e v al u at i on b oard t o ac c ept ext e rna l ly g e ner- a t e d c l o c k s . t h e s c h e m a t i c f o r t h e c l o c k / d a t a i / o i s s h o wn in fi g ur e 5. th e 74h c 243 tra n s c e i v er functions a s a n i / o b u f f e r w h e r e th e m a s - ter/sl a ve j u mper de t ermin e s i f t h e t ransc e i ver o p era t es as a tr a nsm i tt e r or re c e i v e r . cd b 5 3 3 0 a / cdb 5 3 3 1 a 18 ds 1 38db2
t he tr a nsce i v e r o per a tes as a tra n smi t ter with t h e maste r /sl a v e jump e r in t h e master p osi- t i o n . l r c k , s d a t a , a n d s c l k from t h e cs5330 a /31a wil l b e a v a il a bl e o n h d r 2 . hdr 2 2 must be in the 0 posi t ion a n d hdr 2 3 must b e in t h e 1 p o s i ti o n f o r mclk t o b e a n o u tp u t a n d to a v oid b us co n te n ti o n on mclk. t h e tr a nsce i v e r o p era t es as a re c e i v er with t h e m a st e r /s l a ve jump e r i n t h e sl a v e pos i - t i on. l r c k and sclk o n hd r 2 b ec o me i n pu t s. h o w e ve r , the rec o mme n ded mo d e of op e rat i on is to ge n era t e mclk on the e v al u at i on b o ard wi t h hdr 2 3 in t h e 0 posi t ion a nd hdr 2 2 in t h e 1 p o s i ti o n. t h ese d e f a u lt se t ti n gs al l o w m c lk t o be an o u tp u t, with l r ck a n d sclk as i n pu t s. mclk i s al w a y s an ou t put fro m t h e e v a lu a ti o n b o ard. groun d ing a nd p o wer sup p ly decou p ling the c s53 3 0a/ 3 1 a req u ires c aref u l a tt e nt i o n to p o w e r su p p ly a nd gr o un d ing a rran g emen t s to op- tim i ze p e r f o r m a n c e . fi g u r e 2 s h o w s t h e r e comm e nd e d p o w e r a r r a n gem e n t s . t h e cs53 3 0 a /3 1 a is p o s i t i o n e d o v e r t h e a n a l o g g rou n d p la n e, n e a r the digital/analog ground p l a n e s p l it , t o mi n i mize t h e d ista n c e th a t t he c lo c ks t r a v e l . t h e s e ries r e s i s t ors are pr e s e n t on t he c l o c k l i nes to red u ce t he e f fe c t s o f t ransi e nt c urre n ts when dr i vi n g a c ap a ci t i ve l o ad i n master mo d e, a n d re d u ce c lo c k o v e rs h oot w h e n ap p ly- i ng e x ter n al c l oc k s to t he cs 5 33 0 a/3 1 a i n s l a v e mo d e. th i s l ay o ut t ec h ni q ue i s u s e d to min i m i ze d i gi t al n ois e and to i n s u re p rop e r p o wer sup p ly ma t ch- i ng / s e qu e nc i ng. th e decoupling capacitors are l oc a ted as c l os e to t h e cs 5 33 0 a/3 1 a a s p o ssi- b le. ext e ns i ve use o f gro u nd p l ane f i l l on b o th t h e a n al o g and d ig i tal se c ti o ns o f t h e e v al u at i on b oard y i eld l a r g e r e du c ti o ns in rad i at e d n o ise ef- fects. connec t or i npu t / ou t put signal present + 5v in p ut (vd + ) f o r cs8 4 02a a n d digital s e ction ( v a+) f o r cs5 3 30a/3 1 a a n d an a lo g in p ut filter o p-amp gnd in p ut g rou n d co n ne c ti o n from p o w e r s up p ly ainl in p ut l e ft ch a nn e l a nal o g inp u t ainr in p ut ri g ht c ha n nel a n alo g i n put mc l k, sclk, lrck, s d a t a input/output i/o f or maste r , se r ial, le f t/ r ight clo c ks, and se r ial d a t a di g it a l o u t p ut o u t p ut d igital au d io inter f a c e outp u t vi a c oax optical outp u t o u t p ut d igital au d io inter f a c e outp u t vi a o ptical t a ble 1 . s y s t e m con n e c t i o ns cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 19
jumper purpose position f unction se l ected hdr1 cs 5 33 0 a / 3 1a sclk s e lectio n f or cs 8 40 2 a * 5 33 0 a cs 5 33 0 a s e lected 5 3 31a cs 5 33 1 a s e lected hdr10 ma s ter / sl a ve mode s e lection * hi g h mas t er m o de s l a ve mode l o w hdr9 s e lects s o u r ce of sy s t e m cl o cks *hi g h mas t er m o de (53 3 0a clo ck s) l o w s l a ve mod e (external clo c ks) hdr22 hdr23 cl o ck i / o *0 *1 s e e input/output for clocks and data s e c t i o n of t e x t hdr6 s e lects 2 5 6 or 5 1 2 mclk f or cs84 0 2a * 256 5 1 2 s e e cs84 0 2a data s h eet f or details hdr5 (m2) cs 8 40 2 a m o d e s e lect * l ow s e e cs84 0 2a data s h eet f or details hdr4 (m1) *low hdr 3 (m0) * hi g h * d ef a u l t s e t t i n g fr o m f a c t o r y ta b l e 2. cdb5 3 30a j u m p e r s e le c t abl e o p tio n s jumper purpose position f unction se l ected hdr1 cs 5 33 0 a / 3 1a sclk s e lectio n f or cs 8 40 2 a 5 3 30a cs 5 33 0 a s e lected * 5 33 1 a cs 5 33 1 a s e lected hdr10 ma s ter / sl a ve mode s e lection * hi g h mas t er m o de s l a ve mode l o w hdr9 s e lects s o u r ce of sy s t e m cl o cks *hi g h mas t er m o de (53 3 1a clo ck s) l o w s l a ve mod e (external clo c ks) hdr22 hdr23 cl o ck i / o *0 *1 s e e input/output for clocks and data s e c t i o n of t e x t hdr6 s e lects 2 5 6 or 5 1 2 mclk f or cs84 0 2a * 256 5 1 2 s e e cs84 0 2a data s h eet f or details hdr5 (m2) cs 8 40 2 a m o d e s e lect * hi g h s e e cs84 0 2a data s h eet f or details hdr4 (m1) *low hdr3 (m0) *low * d ef a u l t s e t t i n g fr o m f a c t o r y ta b l e 3. cdb5 3 31a j u m p e r s e le c t abl e o p tio n s cd b 5 3 3 0 a / cdb 5 3 3 1 a 20 ds 1 38db2
s w i tc h # 0 = c l o s e d , 1 = op e n c o m m e nt 3 p r o=0 con s umer mode c0=0 1,4 fc1, fc0 c 2 4,c25,c2 6 ,c 2 7 - sam p le f r e qu e ncy 0 0 * 0 1 1 0 1 1 0 00 0 - 44. 1 khz 0 10 0 - 4 8 khz 1 10 0 - 3 2 khz 0 00 0 - 44.1 kh z , cd mode 2 c3 c3 , c4 , c5 - emphasis (1 of 3 bi t s) *1 0 0 00 - n o ne 1 00 - 5 0/15 m s 5 c2 c 2 - co p y/co p y r ight 1 *0 0 - c o p y i nh i b i t e d / c o p y r i g h t a s s e r t ed 1 - co p y p e r mi t te d / c o p y r ig h t not ass e r ted 6 c15 c 1 5 - ge n eratio n status 1 *0 0 - definition is b a se d o n cate g o r y c o d e . 1 - see cs8 4 02a data sh e et, ap p . a 8,7 c8, c9 c 8 - c 1 4 - cate g o r y co d e ( 2 o f 7 bits) 1 1 1 0 0 1 * 0 0 0 00 0 00 0 - gen e ral 0 10 0 00 0 - pcm e nc o der/de c od e r 1000000 - compact disk - cd 1 10 0 00 0 - di g it a l a u di o t ap e - d a t * d ef a u l t s e t t i n g fr o m f a c t o r y tabl e 4 . cs8 4 02a swi t c h d e f i n i t ion s - co n s u m e r m o de s w i tc h # 0 = c l o s e d , 1 = op e n c o m m e nt 3 p r o = 0 pro f e s s ion a l m o d e c0 = 1(d e f a u lt) 1 cre l oc a l s a mple ad d r e ss co u nte r & reli a bility fla g s d e fa u l t 0 1 disa b l e d inte r nally g e ner a t e d 2,5 c6, c7 c 6 , c 7 - sampl e f re q ue n cy d e fa u l t 1 1 1 0 0 1 0 0 0 0 - not i n dic a t e d - de f ault t o 4 8 khz 01 - 4 8 k h z 10 - 4 4 . 1 k h z 11 - 3 2 k h z 4 c1 c 1 - a u dio d e fa u l t 1 0 0 - n o r mal a u d i o 1 - non- a udio 6 c9 c 8 ,c 9 ,c 1 0,c11 - c h an n el mod e (1 of 4 bits) d e fa u l t 1 0 0 00 0 - not i n dic a t e d - de f ault t o 2 - c ha n nel 0 10 0 - s t e r e op h onic 8 ,7 e m 1 , e m0 c 2 , c 3 , c 4 - e m p h a s i s (2 o f 3 b i t s) d e fa u l t 1 1 1 0 0 1 0 0 0 00 - n o t indi c a ted - d e f a ult to n o ne 1 0 0 - n o e mph a sis 1 10 - 5 0/15 m s 1 1 1 - ccit t j .17 ta b l e 5. cs 8 40 2 a s wi t c h de f i n i t i o n s - p r o f e s s i o n a l m o d e cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 21
f i g u r e 1 . s y s t e m bl o c k dia g r a m a n d sig n al f l o w cd b 5 3 3 0 a / cdb 5 3 3 1 a 22 ds 1 38db2
f i g u r e 2. c s 533 0a / 31a an d c o nn ec t i o n s cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 23
figure 3. mclk genera t io n and power down cd b 5 3 3 0 a / cdb 5 3 3 1 a 24 ds 1 38db2
fi gu re 4. c s 8 402 a d i gi t a l a u di o t r a n s m i t t e r c o nn ec t i o n s o p ti on al t o s h i b a p a rt t o t x 1 2 3 av ail a b l e th ro ug h in si gh t e l ect ro ni cs sc ho t t c o r p. tr a n s f o r m e r p a r t 1 219 60- 60 2 av ai l a b l e t h r o ugh s c h o t t c o r p . , wa yz a t a , m n . cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 25
f i g u r e 5. i /o i n t er f a c e f or cl o c k s a n d d a ta fig u r e 6. p o we r su p ply cd b 5 3 3 0 a / cdb 5 3 3 1 a 26 ds 1 38db2
fig u r e 7. cdb5 3 30a/3 1 a c o m po n e n t sid e sil k s c r e e n cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 27
fig u r e 8. cdb5 3 30a/3 1 a c o m po n e n t sid e ( t o p ) cd b 5 3 3 0 a / cdb 5 3 3 1 a 28 ds 1 38db2
f i gure 9. CDB5330A / 31a solder s i de (bottom) cd b 5 3 3 0 a / cdb 5 3 3 1 a ds1 3 8db2 29

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