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communication semiconductors EV6090 user manual cmx639 cvsd codec evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. advance information ? cmx639 product evaluation ? telephone handset connectors ? on-board speaker driver ? variable gain input amplifier ? selectable sample clock rates ? easy jumper/switch configuration ? user prototyping pcb area x(-1) x(-47) -20db to +20db 0db to -6db speaker driver +20db computer interface direct out p1: 1 e3 e4 xtal switch control (local) v+ i n vdd i n agnd v- i n power conditioning telephone handset (mic) telephone handset (earpiece) cmx639 audio +in audio -in input conditioning gain block direct in p1: 2 p1: 3,4 data rate (2) algorithm force idle (2) data en powersave mic input dec in 2 3 4 m m enc in dec out enc out dec in data clocks the EV6090 is a single board evaluation platform used for the evaluation of the cmx639 cvsd codec. the board is powered from an external supply that can be used to evaluate cvsd encoder and decoder performance at different supply voltages. jumpers are provided to select signal paths, clock source, measure device current, etc. convenient i/o allows connection to a telephone hands et, microphone, and/or a loudspeaker for simple experiments.
cvsd codec evaluation kit 2 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. contents section page 1 block diag rams..............................................................................................................3 2 preliminary in formation.................................................................................................5 2.1 laboratory equipment ..........................................................................................................5 2.2 handling precautions ........................................................................................................... 5 2.2.1 static pr otection .............................................................................................................. ........5 2.2.2 contents - unpacki ng........................................................................................................... ...5 3 operation...................................................................................................................... ..5 3.1 set-up ......................................................................................................................... .........5 3.1.1 default jumper c onfiguration .................................................................................................5 3.1.2 connect external regul ated power supply...............................................................................6 3.1.3 set mode of operat ion .......................................................................................................... ..6 3.1.4 quick test ..................................................................................................................... ..........6 3.1.5 further exper imentat ion ........................................................................................................ ..6 3.2 adjustments .................................................................................................................... .....6 3.3 operation ...................................................................................................................... .......6 3.3.1 e3 audio input routing (to the cvsd encoder ) .......................................................................6 3.3.2 e4 audio output routing (f rom the cvsd decoder ).................................................................6 3.3.3 s1 and s2 swit ch se ttings ...................................................................................................... 7 4 schematic diagrams and pcb la yout .........................................................................9 5 specificat ions...............................................................................................................11 mx-com, inc. reserves the right to change spec ifications at any time and without notice.
cvsd codec evaluation kit 3 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 1 block diagrams x(-1) x(-47) -20db to +20db 0db to -6db speaker driver +20db computer interface direct out p1: 1 e3 e4 xtal switch control (local) v+ i n vdd i n agnd v- i n power conditioning telephone handset (mic) telephone handset (earpiece) cmx639 audio +in audio -in input conditioning gain bloc k direct in p1: 2 p1: 3,4 data rate (2) algorithm force idle (2) data en powersave mic input dec in 2 3 4 m m enc in dec out enc out dec in data clocks figure 1: block diagram
cvsd codec evaluation kit 4 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. output gain speaker driver v+ i n vdd i n gnd v- i n power conditioning cmx639 input conditioning & gain pc +v e6 digital gates v+ vdd gnd v- a gnd d gnd figure 2: power conditioning block diagram cmx639 encode out decode in encode clock decode clock local digital control data rate (2) algorithm powersave data enable force idle 3 4 3 4 to pc interface j1 figure 3: digital block diagram
cvsd codec evaluation kit 5 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 2 preliminary information 2.1 laboratory equipment the following laboratory equipment must be us er supplied to use this evaluation kit: required ? 2.7-5.0v regulated dc power supply optional ? 8 ? speaker or headphones. note: a stereo jack is supported because it is popular and available. if a mono plug is connected it will mute the output signal by creating a short to ground. a mono loudspeaker may be connected but it must have a stereo plug. ? microphone ? pots ( plain old telephone system) telephone handset may be used to listen to cvsd encoded and decoded speech. 2.2 handling precautions this evaluation kit is designed for use in office and laboratory environments. the following practices will help ensure its proper operation. 2.2.1 static protection this product uses low power cmos circuits which can be damaged by el ectrostatic discharge. partially damaged circuits can function erroneously, leading to mi sleading results. observe esd precautions at all times when handling this product. 2.2.2 contents - unpacking please ensure that you have received all of the items on the separate in formation sheet (ek6090) and notify mx-com within 7 working days if the delivery is incomplete. 3 operation 3.1 set-up the EV6090 is configured with a cmx639 dip d evice for operation at 2.7 to 5.0vdc. a 4-conductor modular jack (j2), sometimes referred to as an ?rj22 jack,? has been provided to allow for quick speak/listen evaluation using a standard pots handset. the following quick start will allow connection of a handset and power supply to quickly evaluate encoded and decoded cvsd audio. the user can select different sample clock rates and modes of operation to fa miliarize themselves with the operation of the cvsd device. EV6090 power supply j1 j2 figure 4: pots set-up 3.1.1 default jumper configuration ? for single supply operation ensure shorting jumpers ar e installed at locations: e12, e6, e8, p4, and e5. ? to use the on-board crystal ensure jumpers e1 and e2 are installed. ? ensure jumper e3 is set to position 1 and position 2, and jumper e4 is shorting position 2 to position 3 for audio routing to the handset. ? install e13 to route handset to summing amplifier.
cvsd codec evaluation kit 6 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 3.1.2 connect external regulated power supply. ? adjust the supply for 5.0v ? connect the positive lead from the power supply to ?vddin? (p3:2) and the negative lead to ?gnd? (p3:3). 3.1.3 set mode of operation to begin EV6090 operation, set switches s1-c1 (?clkmo de1?) to off and s1-c2 (?clkmode2?) to on to enable 32kbps sampling mode. next, ensure that switch s1-c3 (?algorithm?) is set to off to enable the 3-bit algorithm. alternatively, change s1 switch posit ion c1 and c2 as shown in table 1 for other sample rates. 3.1.4 quick test connect handset and apply power. adjust r6 clockwis e to increase microphone audio level. adjust r31 counterclockwise to increase audio level in the ear piece. 3.1.5 further experimentation other modes of operation are available for test. fo rced idle channel mode of either the encoder or decoder can be realized by changing dip switch settings. the use of table 1, coupled with a review of the cmx639 data bulletin, will allow the user to exercise all operating modes. 3.2 adjustments r6 - adjust audio input level to the codec. r31 - adjust level for both the telephone hand set and speaker volume. 3.3 operation jumpers e3 and e4 allow for different audio input and output routing. for testing with audio signals applied at the ?audio in? jack, jumper e13 should be removed to avoid having undesired amplified signals injected into the encoder input. for testing with audio signals supplied by either the microphone input or the telephone handset, jumper e13 should be installed. due to the high gain nature of this signal path, however, r6 doesn't need to be adjusted >0db. 3.3.1 e3 audio input routing (to the cvsd encoder) jumper position 1 to 2 enables the following: ? rca audio input - rc1 ? mic input ? j3 ? telephone hand set input ? j2 jumper position 2 to 3 enables the following ? screw terminal strip p2:1 input 3.3.2 e4 audio output routing (from the cvsd decoder) jumper position 1 to 2 enables output audio to the following: ? rca audio output ? rc2 ? screw terminal strip p2:3 output jumper position 2 to 3 enables output audio to the following: ? telephone hand set output ? j2 ? speaker output j4
cvsd codec evaluation kit 7 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 3.3.3 s1 and s2 switch settings circuit condition when switch is: switch name description on off s1-c1 clkmode1 used in conjunction with clkmode2 to set sampling rate and source (internal or external). see table on EV6090 for switch combinations. s1-c2 clkmode2 used in conjunction with clkmode1 to set sampling rate and source (internal or external). see table on EV6090 for switch combinations. s1-c3 algorithm determines whether 3-bit or 4-bit companding algorithm will be used. in general, 3-bit companding yields better results at rates of 32kbps and below, while 4-bit companding should be used at 48kbps and above. 4-bit algorithm 3-bit algorithm s1-c4 dataen this switch is used in combination with the /powersave switch to determine the state of the cmx639 encoder output. encoder output is at high impedance regardless of state of /powersave switch. encoder output is enabled if /powersave switch is off, and is set to v ss if it is on. s2-c1 /encoderforceidle this switch causes a ?perfect idle? pattern of 0101? to be present at encoder output. encoder produces idle pattern at output. encoder operates normally. s2-c2 decin this switch selects the source of the decoder input signal. decoder input taken from pcmcia interface. decoder input taken from either decin screw terminal or encoder output. s2-c3 /decoderforceidle this switch causes a 0101? pattern to be internally applied to the cmx639 decoder, resulting in the decoder output pin going to v dd /2. decoder output is v dd /2. decoder operates normally.
cvsd codec evaluation kit 8 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. s2-c4 /powersave this switch is used in combination with the dataen switch to determine the state of the cmx639 encoder output. cmx639 is in powersave mode. cmx639 operates normally. table 1: s1 and s2 switch settings clk mode 1 /encoder force idle dec in /powersave algorithm data en on on c1 c2 sampling clocks c1 external clocks c1 64kbps c1 32kbps c1 16kbps s2 s1 s2 c4 s1 c4 encoder output state c1 enabled c1 vss c1 c1 high impedance high impedance /decoder force idle clk mode 2 not idle idle not idle idle pcmcia interface cmx639 or screw terminal powersaved not powersaved 3-bit 4-bit clk mode 1 enabled figure 5: EV6090 switch settings
cvsd codec evaluation kit 9 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 4 schematic diagrams and pcb layout pcmcia:c7 10uf c12 j1:24 e6 e5 e12 p3:4 p3:2 p3:3 p3:1 agnd pcv+ encin gnd c8 2200pf 1 2 rc2 p2:4 p2:3 p2:2 p2:1 10k r9 agnd agnd agnd 2 3 1 e4 i/p_bias c15 .1uf c13 .1uf e9 e8 3.9 r1 agnd 1000uf c10 agnd dgnd p4 a/d_shor t dgnd v- v+_in 1000uf c32 100 ohm r42 100 ohm r43 1 2 3 4 l1 4.4mh 10 11 s1:4 10k r5 v+ v- 3 + 2 - 8 4 1 u2:a lm6482 audio in c5 .1uf 10k r3 10k r4 c6 .1uf 1 2 rc1 dgnd 3 1 s2:1 j1:2 j1:3 j1:17 p1:4 j1:26 1k r17 p1:3 1k r28 e11 e10 1k r29 1k r10 10k r19 c7 2200pf 2 3 1 e3 10k r20 1k r11 c4 .1uf 1uf c9 1 2 3 100k r6 10k r8 sumin 10k r7 c14 1uf agnd c36 .1uf 1k r14 r44 10k 3 4 74hc04 u3:b 5 6 74hc04 u3:c 4 5 s2:2 c2 68pf c1 33pf e2 e1 7 dataen 8 n/c 10 encin 9 bias 12 n/c 13 decout 1 xtal 6 encforceidle 19 algorithm 20 clkmode2 17 decin 5 encout 14 n/c 15 powersa ve 16 decforceidle 2 xtal 4 encclk 18 decclk 3 n/c 22 vdd 11 vss 21 clkmode1 cmx639 u1 1k r13 10k r23 r2 1m bias 10k r25 agnd e7 vdd 1uf c11 .1uf c37 j1:19 j1:18 1k r12 10k r26 3 1 s1:1 4 5 s1:2 dgnd pcmcia:a0 encout pcmcia:c3 pcmcia:c4 j1:1 j1:20 j1:21 p1:1 1k r16 j1:9 p1:2 1k r18 9 7 s2:3 9 7 s1:3 dgnd 1k r22 10k r39 r21 10k pcv+ j1:33 j1:8 j1:28 j1:22 p1:5 x1 1.024mhz 10k r24 1k r15 1k r27 10 11 s2:4 3 1 s3 amps dgnd dgnd dgnd dgnd dgnd dgnd dgnd j1:25 1 2 u3:a 74hc04 9 8 u3:d 74hc04 11 10 u3:e 74hc04 13 12 u3:f 74hc04 j1:7 j1:6 j1:5 j1:4 agnd c31 .1uf vdd v+ dgnd 1000uf c33 agnd v+ in vdd in v- in decout gnd audio out agnd pcmcia:b6 j1:15 pcmcia:c0 pcmcia:out -0 decclk pcmcia:a2 pcmcia:a1 encclk c3 .1uf 5 + 6 - 7 u2:b lm6482 tp1 pcmcia:c1 pcmcia:c2 pcmcia:b0 decin gnd pcmcia:c5 pcmcia:exclk-0 pcmcia:a7 figure 6: cvsd control section
cvsd codec evaluation kit 10 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. agnd agnd c34 0.1uf 100k r37 10 ohm r38 c22 0.1uf 7 4 3 + 8 5 2 - 1 6 u5 lm386 100uf c24 c1 c2 c3 c4 c5 j4 speaker c23 0.047uf agnd agnd agnd c35 1uf 4 1 2 3 j2 tel_jack/4 telephone handset mic c1 c2 c3 c4 c5 j3 agnd c21 10uf c27 0.1uf v+ 100k r36 c17 100pf c16 .1uf v+ 10k r35 470k r32 e13 new_bias 3 + 2 - 8 4 1 u4:a c18 .1uf 1 2 3 100k r31 5 + 6 - 7 u4:b lm6482 100k r34 100k r33 c19 470pf v- agnd agnd new_bias v+_in amps 3 + 2 - 8 4 1 u6:a c25 .1uf v+ c26 .1uf v- c28 0.1uf 10k r41 v+ new_bias agnd 10k r30 sumin 10k r40 c30 .1uf c29 0.01uf v- c20 .1uf 5 + 6 - 7 u6:b i/p_bias lm6482 lm6482 lm6482 figure 7: audio amp section
cvsd codec evaluation kit 11 EV6090 evaluation kit ? 2001 mx-com, inc. www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054 doc. # 20480218.003 4800 bethania station road, winston-salem, nc 27105-1201 usa all trademarks and service marks are held by their respective comp anies. 1 c1 c2 c3 c4 23 4 on s2 lm386 u5 100k r36 0.047uf c23 10 ohm r38 c24 100uf 0.1uf c22 c35 1uf 0.1uf c28 r31 100k 1 c1 c2 c3 c4 2 3 4 on s1 e4 j4 p2 j3 e11 e13 rc1 rc2 j2 r37 100k c21 10uf .1uf c34 c25 .1uf r40 10k 0.01uf c29 c30 .1uf .1uf c26 r41 10k c20 .1uf r35 10k c18 .1uf c17 100pf r32 470k r30 10k c27 .1uf c6 .1uf c5 .1uf r8 10k 2200pf c7 10k r5 r7 10k .1uf c3 2200pf c8 10k r9 .1uf c16 r33 100k c4 .1uf 10k r4 10k r3 r6 100k lm6482 u4 u6 u2 e10 19 37 20 1 j1 r12 1k r11 1k 1k r13 1k r10 r18 1k 1k r17 c31 33pf r42 100 ? r1 3.9 c33 1000uf e12 e9 e8 p3 l1 r29 1k r22 1k 1k r28 c32 1000uf c15 .1uf 1000uf c10 10k r44 r14 1k 1k r16 1k r15 1k r27 u3 74hc04 e2 e3 e6 e7 p1 p4 s3 10k r25 r24 10k r23 10k r39 10k r19 10k 1uf c9 c1 33pf r2 1m c2 68pf 100k r34 c19 470pf .1uf c36 c14 1uf c11 1uf .1uf c37 x1 1.024mhz cmx639 u1 10k r20 10k r21 10k r26 r43 c13 .1uf 10uf c12 e5 speaker mic output driver section audio control section gnd decout gnd encin encforceidle clkmode1 powersa ve decforceidle decin tel hndset rc2 audio out audio in rc1 computer control section power conditioning section s3 13 2 1 3 2 tp1 e1 halt EV6090 www.mxcom.com www.cmlmicro.co.uk www.cmlmicro.com.sg mx6x9 circuit section clkmode1 off off on on clkmode2 off on off on local digital control section gnd decclk encclk decin encout 16kbit 32kbit 64kbit external 3bit 4bit v+in vddin gnd v-in 100 ? clkmode2 algorithm dataen lm6482 lm6482 audio in adj audio out/ vol adj 3bit 4bit algorithm off on figure 8: evaluation board layout 5 specifications characteristic signal designator connector designator min typ max unit s storage temperature -20 70 c operating temperature 10 35 c analog ground agnd j2:4, j3:c1, j4:c1, p2:2, p2:4, p3:3 0 0 0 v analog positive supply voltage v+ in p3:1 2.7 5.5 v analog negative supply voltage v- in p3:4 -5.5 0 v dut & digital supply voltage vdd in p3:2 3.0 5.5 v microphone input jack type mic j3:c1, c5 mono or stere o speaker output jack type speaker j4:c1, c3, c5 stere o
cml product data in the process of creating a more global image, the three standard product semiconductor companies of cml microsystems plc (consumer microcircuits limited (uk), mx-com, inc (usa) and cml microcircuits (singapore) pte ltd) have undergone name changes and, whilst maintaining their separate new names (cml microcircuits (uk) ltd, cml microcircuits (usa) inc and cml microcircuits (singapore) pte ltd ), now operate under the single title cml micro- circuits . these companies are all 100% owned operating companies of the cml microsystems plc group and these changes are purely changes of name and do not change any underlying legal entities and hence will have no effect on any agreements or contacts currently in force. cml microcircuits product prefix codes until the latter part of 1996, the differentiator between products manufactured and sold from mxcom, inc. and consumer microcircuits limited were denoted by the prefixes mx and fx respectively. these products use the same silicon etc. and today still carry the same prefixes. in the latter part of 1996, both companies adopted the common prefix: cmx. this notification is relevant product information to which it is attached. company contact information is as below: cml microcircuits (uk)ltd communication semiconductors cml microcircuits communication semiconductors cml microcircuits (singapore)pteltd communication semiconductors cml microcircuits (usa) inc. communication semiconductors oval park, langford, maldon, essex, cm9 6wg, england tel: +44 (0)1621 875500 fax: +44 (0)1621 875600 uk.sales@cmlmicro.com www.cmlmicro.com 4800 bethania station road, winston-salem, nc 27105, usa tel: +1 336 744 5050, 0800 638 5577 fax: +1 336 744 5054 us.sales@cmlmicro.com www.cmlmicro.com no 2 kallang pudding road, 09-05/ 06 mactech industrial building, singapore 349307 tel: +65 7450426 fax: +65 7452917 sg.sales@cmlmicro.com www.cmlmicro.com d/cml (d)/1 february 2002

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