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the best usb audio single chip for stereo digital control speakers application CM103+ 16-bit stereo usb audio controller datasheet version 1.01 c-media electronics inc. tel: 886-2-8773-1100 fax: 886-2-8773-2211 6f, 100, sec. 4, civil boulevard, taipei, taiwan 106, r.o.c. for detailed product information, please contact tu sales@cmedia.com.tw ut 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 2 - notices this document is provided ?as is? with no warranties what so ever, including any warranty of merchant ability, noninfringement, fitness for any particular purpose, or an y warranty otherwise arising out of any proposal, document or sample. all rights reserved. no part of th is document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including information storage and retrieval systems, without permission in writing from c-media electronics, inc. u copyright copyright (c) 2005-2007 c-media electronics inc. all rights reserved. all content included on this document, such as text, graphics, logos, button icons, images, audio clips, digital dow nloads, data compilations, and software, is either the exclusive property of c-media electronics inc., its affiliates (collectively, "c-media"), its content supplie rs, or its licensors and protected by republic of china and international copyright laws. u trademarks c-media, the c-media logo, xe ar 3d, xear 3d logo, speaker shifter, smart jack, and smart audio jack are trademarks of c-media electronics inc. in republic of china and/or other countries. all other brand and product names listed are tradem arks or registered trademarks of their respective holders and are hereby recognized as such. *c-media reserves the right to modify th e specifications without further notice* 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 3 - table of contents 1. descriptions and overview 5 2. features 5 3. pin descriptions 7 3.1 pin assignment by pin number 7 3.2 pin-out diagram 7 3.3 pin signal descriptions 8 4. block diagram 11 5. ordering information 12 6. function descriptions 13 6.1 usb interface 13 6.1.1 device descriptor 13 6.1.2 configuration descriptor 14 6.1.3 usb audio topology diagram 14 6.2 eeprom (93c46) content format 15 6.3 hid feature 16 6.3.1 what?s hid 16 6.3.2 hid descriptor 16 6.4 dynamic range control (drc) 18 7. electrical characteristics 19 7.1 absolute maximum rating 19 7.2 operation conditions 19 7.3 sperker impedance vs. output power consumption 20 7.4 audio performance 20 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 4 - 8. audio performance curves 22 8.1 frequency response (10k ohm loading) 22 8.1.1 frequency response @ 44.1 ks/sec 22 8.1.2 frequency response @ 48 ks/sec 22 8.2 passband ripple (10k ohm loading) 23 8.2.1 passband ripple @ 44.1 ks/sec 23 8.2.2 passband ripple @ 48 ks/sec 23 9. reference application circuit 24 10. reference 25 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 5 - 1. descriptions and overview CM103+ is a highly integrated single chip for usb digital control speaker application. it is a truly plug-and-play usb audio de vice and provided high quality digital sound playback. this one chip solution not only embedded usb tran sceiver, adc, dac component but also integrated digital control pow er amplifier function for u sb digital sound application. minimum external components are needed for building a high-end 2ch usb speaker system, which makes CM103+ a simple and very co st-effective solution. since no driver is necessary for audio playback on all major os. the innovation technology drc feature was integrated on CM103+. this dynamic range control function can support high efficiency volume output to get loudness sound effect similar d class amplifier capability. vender c an just using single chip to saving external amplifier component and getting a better listening experience when listen to a music source with wide dynamic range. customers can use an eeprom to define vendor specific vid / pid / product string, and even special hardware configuration. more fl exible and customized design is possible with gpio pin, which is accessible by usb vendor specific request. for energy saving, usb suspend mode and resume is supported by CM103+ . with power amplifier enable pin and volume control vr input pin, a traditional speaker front panel design can be built. moreover, CM103+ support usb standard hid interface wh ich provide vol_up / vol_dn / play_mute buttons and rotary encoder for pure digital volume control. 2. features usb 2.0 full speed compatible and usb if certification usb audio devices class specification ver1.0 compatible usb bus powered 500ma, without external power supply high performance 16-bit stereo, 48 / 44.1 khz sampling rate for audio playback s/pdif output interface embedded usb transceiver embedded high performance 16-bit audio dac 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 6 - embedded digital control power amplifier for speaker driving support power amplifier enable / disable control pin support dynamic range control (drc) featur e to provide a better listen experience embedded power-on-reset block embedded 5v to 3.3v regulato r with voltage level detector for single 5v external power supply embedded temperature pr otection circuit embedded x2 modulation for higher audio quality embedded anti-pop circuit with internal feedback structure single 12mhz crystal input with embedded pll isochronous transfer using adaptive synchronization with internal pll external eeprom interface for vendor specific vid / pid / product string eeprom read / write function via vendor specific request for mass production convenience analog volume control input with simple external vr circuit digital volume control input wi th digital rotary encoder or vol_up / vol_dn / play_mute bottoms vol_up / vol_dn / play_mute pins and di g ital rotary encoder interface support usb hid devices class ver1.11 for host volume control synchronization supports usb suspend / resume mode and remote wakeup with digital volume control pins led indicator pin during playback 1 gpio pin for application specific usage 3.3v i/o with 5v tolerance dolby? digital and dts audio streaming via s/pdif output compatible with win 98se / win me / win 2000 / win xp, and mac os 10.x without additional driver 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 7 - 3. pin descriptions 3.1 pin assignment by pin number pin # signal name pin # signal name pin # signal name pin # signal name 1 eesk 13 nc 25 avdd 37 nc 2 dvdd5v 14 nc 26 avdd 38 drcen 3 eecs 15 regv 27 lol 39 spdifo 4 eedw 16 nc 28 lol 40 pdsw 5 eedr 17 usb_dp 29 lol 41 paen 6 ledo 18 nc 30 lol 42 gpio 7 mute 19 usb_dm 31 lor 43 vol_up 8 dvdd5v 20 nc 32 lor 44 vol_dn 9 dvdd5v 21 dvss 33 lor 45 dvss 10 vp 22 test 34 lor 46 nc 11 vn 23 vref 35 avss 47 xtal_o 12 nc 24 voladj 36 avss 48 xtal_i * note : -nc- means no-connect 3.2 pin-out diagram CM103+ eesk dvdd5v eecs eedw eedr ledo mute dvdd5v dvdd5v vp vn nc avss avss lor lor lor lor lol lol lol lol avdd avdd nc nc regv nc usb_ dp nc us b_ dm nc dvss test vref vol_adj xtal_i xtal_o nc dvss vol_dn vol_up gpi o paen pdsw spdi fo nc 1 13 25 37 12 24 36 48 drc e n 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 8 - 3.3 pin signal descriptions pin # symbol type description 1 eesk do, 8ma, sr eeprom interface clock 2 dvdd5v p 5v power supply for digital circuit 3 eecs do, 8ma, sr eeprom interface chip select 4 eedw do, 8ma, sr eeprom interface write to eeprom 5 eedr di, st, pd, 5vt eeprom interface read from eeprom 6 ledo do, 8ma, sr led indicator for playback 7 mute di, st, pu mute pin (hid standard) 8 dvdd5v p 5v power supply 9 dvdd5v p 5v power supply 10 vp di, st, pu digital rotary encoder interface pin a 11 vn di, st, pu digital rotary encoder interface pin b 12 nc - no connect 13 nc - no connect 14 nc - no connect 15 regv ao regulator output 3.3v 16 nc - no connect 17 usb_dp aio usb data d+ 18 nc - no connect 19 usb_dm aio usb data d- 20 nc - no connect 21 dvss p digital ground 22 test di, st, pd test mode select pin, pull- down in normal operation 23 vref ao connecting to external decoupling capacitor for embedded bandgap circuit; 2.25v output 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 9 - 24 voladj ai analog volume control input from external vr circuit. 0 ~ 2.25v:+3db / mute 3.5 ~ 5v: 0db 25 avdd p 5v power supply for analog circuit 26 avdd p 5v power supply for analog circuit 27 lol ao line out left channel 28 lol ao line out left channel 29 lol ao line out left channel 30 lol ao line out left channel 31 lor ao line out right channel 32 lor ao line out right channel 33 lor ao line out right channel 34 lor ao line out right channel 35 avss p analog ground 36 avss p analog ground 37 nc - no connect 38 drcen di 1:drc on (default) 0:drc off 39 spdifo do, 8ma, sr s/pdif data output 40 pdsw do, 8ma, sr power down switch control signal output 1: normal mode 0: power down mode (suspend mode) 41 paen di, st power amplifier control input, connect to a switch or pull-high in normal operation. h: enable power amplifier (normal mode) l: disable power amplifier 42 gpio dio, 8ma, st, sr, pd gpio pin, controlled via vender specific command 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 10 - 43 vol_up di, st, pu volume up pin (hid standard) 44 vol_dn di, st, pu volume down pin (hid standard) 45 dvss p digital ground 46 nc - no connect 47 xtal_o ao output pin for 12mhz oscillator 48 xtal_i ai input pin for 12mhz oscillator *note u :di / do / dio ? digital input / output / bi-directional pad ai / ao / aio ? analog input / output / bi-directional pad p ? power pin sr ? slew rate control st ? schmitt trigger pd / pu ? pull down / pull up 5vt ? 5 volt tolerant (3.3v pad) 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 11 - 4. block diagram usb i/f hid control i/f fifo crystal osc usb clock gen audio clock gen power supply dac adc vol -43.5~ +3db op eeprom i/f dac vol - 43 .5 ~ +3db op d- d+ lol lor xtal _i xtal_o 5v regv (3.3v) gnd pdsw paen vol_up vol_dn vn mute vp eedr eedw eesk eecs bandgap vref voladj test ledo gpio dynamic range control 2x over sampling digital filter spdifo block diagram of CM103+ 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 12 - 5. ordering information model number package operating ambient temperature supply range CM103+ 48-pin lqfp 7mm7mm1.4mm (plastic) 0 o c to +70 o c dvdd = 5v, avdd = 5v 48-lead thin plastic quad flatpack (lqfp) outline dimensions * dimensions shown in inches and (mm) 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 13 - 6. function descriptions 6.1 usb interface 6.1.1 device descriptor offset field size value (hex) description 0 blength 1 12 total 18 bytes 1 bdescriptortype 1 01 device descriptor 2 bcdusb 2 0110 usb 1.1 compliant. 4 bdeviceclass 1 00 5 bdevicesubclass 1 00 6 bdeviceprotocol 1 00 7 bmaxpacketsize0 1 08 endpoint zero size = 8 bytes 8 idvendor 2 0d8c vendor id 10 idproduct 2 0104 product id 12 bcddevice 2 0010 device release number 14 imanufacturer 1 01 index of string descriptor describing manufacturer -> ? c-media inc. ? 15 iproduct 1 02 index of string descriptor describing product -> " c-media usb audio " 16 iserialnumber 1 00 index of string descriptor describing the device?s serial number 17 bnumconfigurations 1 01 configurations number = 1 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 14 - 6.1.2 configuration descriptor offset field size value (hex) description 0 blength 1 09 to ta l 9 b y t e s 1 bdescriptortype 1 02 configuration descriptor 2 wtotallength 2 008d total length of data returned for this configuration. 4 bnuminterfaces 1 03 number of interfaces supported by this configuration. 5 bconfigurationvalue 1 01 6 iconfiguration 1 00 7 bmattributes 1 80 self-powered without remote wakeup 8 bmaxpower 2 fa maximum power consumption of the usb. 0xfa=500 ma 6.1.3 usb audio topology diagram usb streaming id = 01 feature unit (volume) (mute) id = 0d speaker id = 03 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 15 - 6.2 eeprom (93c46) content format CM103+ supports four-wire serial eeprom interface. when an external serial eeprom is detected, vendor id, product id , and product string reported within device descriptor will be derived from the content of serial eeprom. the setting values of serial eeprom is shown below: address contents 00 0x434d (*note1) 01 vender id 02 product id 03 string1, string0 04 string3, string2 05 string5, string4 06 string7, string6 07 string9, string8 08 string11, string10 09 string13, string12 10 string15, string14 11 string17, string16 12 string19, string18 13 string21, string20 14 string23, string22 15 bit 0: drc enable / disable 16~63 -- *note : the first word of the eeprom is a magic code. only when it matches, the ic will regard the serial eeprom valid. 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 16 - 6.3 hid feature hid feature is provided by CM103+ so user setting to volume-up, volume-down, playback-mute button pin, and the digital-r otary-encoder for volume control is reported to the host to synchronize host side setting. 6.3.1 what?s hid usb protocols can configure dev ices at startup or when they are plugged in at run time. these devices are broken into various device classes. each device class defines the common behavior and protocols for devices that serve similar functions. the hid (human interface device) class is one of the device classes. the hid class consists primarily of devices that are used by humans to control the operation of computer system s. typical examples of hid class devices include: - keyboards and pointing devices, for example: mouse, trackballs, and joysticks. - front-panel controls, for example: knobs, switches, buttons, and sliders. - controls that might be found on devic es such as vcr remote controls, games or simulation devices, for exampl e: data gloves, throttles, and steering wheels. - devices that may not requi re human interaction but provide data in a similar format to hid class devices, for exam ple: bar-code readers, thermometers, or voltmeters. 6.3.2 hid descriptor hid interface descriptor offset field size value (hex) description 0 blength 1 09 size of this descriptor: 9 byte 1 bdescriptortype 1 04 interface descriptor type 2 binterfacenumber 1 02 number of interface 3 balternatesetting 1 00 alternate 0 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 17 - 4 bnumendpoints 1 01 number of endpoints used by this interface: 1 5 binterfaceclass 1 03 hid interface class 6 binterfacesubclass 1 00 no subclass 7 binterfaceprotocol 1 00 must be set to 0 8 iinterface 1 00 index of a string descriptor that describes this interface. hid descriptor offset field size value (hex) description 0 blength 1 09 total 9 bytes 1 bdescriptortype 1 21 hid descriptor type 2 bcdhid 2 0100 hid class version 1.00 4 bcountrycode 1 00 5 bnumdescriptors 1 01 6 bdescriptortype 1 22 report descriptor 7 wdescriptorlength 2 002a numeric expression that is the total size of the optional descriptor interrupt in endpoint descriptor offset field size value (hex) description 0 blength 1 07 total 7 bytes 1 bdescriptortype 1 05 endpoint descriptor type 2 bendpointaddress 1 81 in endpoint endpoint number = 3 3 bmattributes 1 03 interrupt endpoint type 4 wmaxpacketsize 2 0003 maximum packet size: 4 bytes 6 binterval 1 04 interrupt interval: 4ms 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 18 - 6.4 dynamic range control (drc) CM103+ include a new feature called dyna mic range control (drc), and with a default on setting (users can still turn it of f within the windows audio advance control panel) dynamic range is defined as t he difference, in decibels (d b), between the loudest and quietest sounds in any particular piece of audio content. classical music is a good example, with ranges from piano (soft) to fo rte to fff (for extremely loud). movies also typically have a wide dynamic range, which may cause you to have to turn the volume up and down as scenes change. for example, when watching a movie at home, you may be forced to turn up volume to hear th e dialog in a quiet scene, and then quickly turn it down again during a car chase scene that follows. in this way, there may be times in a home theater environment when it w ould be useful to be able to control the dynamic range. with dynamic range control enabled, the full dynamic range (a) of the program is reduced (b). +10db 0db -10db -20db -30db -40db -50db -60db +20db lower levels raised peaks reduced a b drc peaks reduced lower levels raised peaks clipped lower levels hard to heard a b 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 19 - 7. electrical characteristics 7.1 absolute maximum rating symbol parameter value unit dvmin min digital supply voltage ? 0.3 v dvmax max digital supply voltage + 6 v avmin min analog supply voltage ? 0.3 v avmax max analog supply voltage + 6 v dvinout voltage on any digital input or output pin ?0.3 to +5.5 v avinout voltage on any analog input or output pin ?0.3 to +5.5 v t b stg b storage temperature range -40 to +125 p 0 p c esd (hbm) esd human body mode 2000 v esd (mm) esd machine mode 200 v latchup latch up test 200 ma 7.2 operation conditions min typ max unit analog supply voltage 4.5 5.0 5.5 v digital supply voltage 4.5 5.0 5.5 v total power consumption - - 500 ma suspend mode power consumption - - 320 ua operating ambient temperature 0 - 70 p o p c 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 20 - 7.3 sperker impedance vs. output power (per channel) loading (ohm) items 4 ohm 8 ohm 32 ohm 10k ohm vpp 3.14 3.4 3.635 3.722 vrms 1.11 1.202 1.285 1.316 w(rms/sin wave) 308 mw 181 mw 52 mw 0.17 mw w(rms/square wave) 616 mw 361 mw 103 mw 0.35 mw w(pmpo) 2460 mw 1450 mw 410 mw 1 mw *note1 : test condition @ 25 o c, 5 volt +- 10%, 1khz sin wave *note2 : typical output with thd+n < 1%; maximal output with thd+n < 10% 7.4 audio performance min typ max unit resolution -- 16 -- bits frequency response @ 48khz 20 -- 20k hz frequency response @ 44.1khz 20 -- 20k hz passband ripple @ 48 khz 40 -- 9.6k hz passband ripple @ 44.1 khz 40 -- 8.8k hz dac (10k ohm loading) snr -- 97.75 -- db dynamic range -- 96.27 -- db thd + n -- -67.97 -- db output voltage (rms) - 1.316 - vrms 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 21 - dac (32 ohm loading) snr -- 97.68 -- db dynamic range -- 95.99 -- db thd + n -- -57.82 -- db output voltage (rms) - 1.285 - vrms dac (8 ohm loading) snr -- 97.67 -- db dynamic range -- 96.03 -- db thd + n -- -53.28 -- db output voltage (rms) - 1.202 - vrms dac (4 ohm loading) snr -- 97.45 -- db dynamic range -- 95.89 -- db thd + n -- -52.76 -- db output voltage (rms) - 1.11 - vrms 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 22 - 8. audio performance curves 8.1 frequency response (10k ohm loading) 8.1.1 frequency response @ 44.1 ks/sec c-media 05/31/05 14:10:33 digital playback (pc-d-a) for line output frequency response wl-multitone-44k.at2c color sweep trace line style thick data axis comment 1 1 cyan solid 3 fasttest.ch.1 ampl!normalize left 1 2 yellow solid 3 fasttest.ch.2 ampl!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 20 10k 50 100 200 500 1k 2k 5k hz 8.1.2 frequency response @ 48 ks/sec c-media 05/31/05 14:07:22 digital playback (pc-d-a) for line output frequency response wl-multitone-48k.at2c color sweep trace line style thick data axis comm ent 1 1 cyan solid 3 fasttest.ch.1 am pl!norm alize left 1 2 yellow solid 3 fasttest.ch.2 am pl!norm alize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 30 10k 50 100 200 500 1k 2k 5k hz 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 23 - 8.2 passband ripple (10k ohm loading) 8.2.1 passband ripple @ 44.1 ks/sec c-media 05/31/05 14:11:07 digital playback (pc-d-a) for line output passband ripple @44.1ks/sec wl-passbandripple-m44k.at2c color sweep trace line style thick data axis comment 1 1 cyan solid 3 fasttest.ch.1 ampl!normalize left 1 2 yellow solid 3 fasttest.ch.2 ampl!normalize left -0.4 +0.4 -0.2 -0 +0.2 d b 40 8k 50 100 200 500 1k 2k 5k hz 8.2.2 passband ripple @ 48 ks/sec c-media 05/31/05 14:09:08 digital playback (pc-d-a) for line output passband ripple @48ks/sec wl-passbandripple-m48k.at2c color sweep trace line style thick data axis comment 1 1 cyan solid 3 fas ttes t.ch.1 am pl!norm alize left 1 2 yellow solid 3 fasttest.ch.2 ampl!normalize left -0.4 +0.4 -0.2 -0 +0.2 d b 40 9k 50 100 200 500 1k 2k 5k hz 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 24 - 9. reference application circuit 4 .com u datasheet
CM103+ usb stereo audio chip for digital speakers application date: 09/25/2005 version: 1.01 - 25 - 10. reference ? universal serial bus specification, version 2.0 ? universal serial bus device class defini tion for audio devices, version 1.0. ? universal serial bus device class defini tion for human interface devices (hid), version 1.11 end of specifications c-media electronics inc. 6f., 100, sec. 4, civil boulevard, taipei, taiwan 106 r.o.c. tel:886-2-8773-1100 fax:886-2-8773-2211 e-mail tu sales@cmedia.com.tw ut url tu http://www.cmedia.com.tw ut 4 .com u datasheet

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