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best single chip usb audio controller for pc entertainment cm102-a/102s usb 2ch audio controller data sheet version 1.4 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 sales@cmedia.com.tw
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 1 - notices this document is provided ?as is? with no warranties whatsoever, including any warranty of merchantability, noninfringement, fitness for any particular purpose, or any 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 re trieval systems, without permission in writing from the c-media electronics, inc. third-party brands and names are the property of their respective owners. copyright 2002-2003 ? c-media electronics inc. *c-media reserves the right to modify the specifications without further notice*
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 2 - 1.description and overview cm102 series is a highly integrated single chip for usb speaker applica tion. minimum external components are needed for building an usb speak er system, which makes cm102-a/s a simple and very cost-effective solution. since no driver is necessary for audio playback on all major os; cm102-a/s provides a truly plug-and- play feature for external digital audio playback. for energy saving, usb suspend mode and resume is supported by cm102-a/s. with power amplifier enable pin and volume control vr input pin, a traditional speaker front panel design can be built. more flexible and customized design is possible with gpio pin, which is accessible by usb vendor specific request. features usb 2.0 full speed compatible usb audio device class specification v1.0 compatible usb bus powered 500ma operation with suspend mode support single 12mhz crystal input with on-chip pll and embedded usb transceiver usb audio function topology has 1 input terminal, 1 output terminal, and 1 feature unit alternate zero bandwidth setting for releasing bandwidth on usb bus during inactive operation isochronous transfer using adaptive synchronization with internal pll high performance 48khz sampling rate for audio playback embedded high performance 16 bit audio dac embedded class ab power amplifier for speaker driving embedded power on reset block and power am plifier enable / disable control pin volume control input with simple external vr circuit gpio pin for application specific usage s/pdif output interface single 5v external power supply with internal power regulation 3.3v io with 5v tolerance; 3.3v core logics design compatible with win 98se / win me / win 2000 / win xp, and mac os 9 / os x withou t additional driver compact 18 pin sop package target application: multimedia usb audi o box, decoder integrated, pen driver dolby digital real time content encoder (ac-3) software value added software xear 3d sound technology with hrtf 3d, eax tm , speaker shifter and virtual 5.1ch effects
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 3 - pin descriptions cm102-a/102s pin # signal name pin # signal name 1 paen 10 test 2 gpio 11 vref 3 xo 12 voladj 4 xi 13 avdd 5 dvdd1 14 lol 6 dvdd2 15 lor 7 usbdp 16 avss 8 usbdm 17 spdif out 9 dvss 18 pdsw figure 1. pin assignments (top view)
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 4 - pin # symbol type description 1 paen di, pd power amplifier enable; h ? normal mode, l ? power down power amplifier 2 gpio dio, pd gpio pin, default is input mode after reset; accessible by usb vendor specific request 3 xo ao clock output pin for 12mhz oscillator 4 xi ai clock input pin for 12mhz oscillator 5 dvdd1 p 5v digital power 6 dvdd2 p 3.3v voltage from internal regulator for decouple capacitor connection it is not affected by power down mode and can be used to connect usb pull up resistor. 7 usbdp aio usb data d+ 8 usbdm aio usb data d- 9 dvss p 5v digital ground 10 test di, pd test mode select pin; pull low in normal mode operation 11 vref ao connect to external decouple capacitor for embedded bandgap 12 voladj ai 0 ~ 2.25v input for volume adjustment by external vr; pull high to disable vr volume adjustment function 13 avdd p 5v analog power 14 lol ao line out left channel 15 lor ao line out right channel 16 avss p 5v analog ground 17 spdif out do spdif out 18 pdsw do, 4ma power down switch control 1: normal mode, 0: power down mode note: di ? digital input pin , do ? digital output pin, dio ? digital bi-directional pin, p ? power pin, pd ? pull down with 100k ohm resistor, ai ? analog input, ao ? analog output
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 5 - block diagram of cm102-a/102s usb trx usb if pll1 48 mhz pll2 12.288 mhz usb protocol processing iso out processing power on reset vref vr input 6 bit adc bandgap line out power amp +21 ~ -33 db sram 16 bit dac 5v to 3.3v regulator control block paen test gpio dvdd2 pdsw figure 2 ?g block diagram of cm102-a/102s vendor specific request for gpio access gpio write offset field size value description 0 bmrequesttype 1 43 1 brequest 1 01 2 wvalue 2 value bit 0: gpio value bit 1: 1: output; 0: input 4 windex 2 0000 6 wlength 2 0000 gpio read offset field size value description 0 bmrequesttype 1 c3 1 brequest 1 81 2 wvalue 2 value bit 0: gpio value bit 1: 1: output; 0: input 4 windex 2 0000 6 wlength 2 0001
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 6 - 2. ordering information model number package operating ambient temperature supply range 18-pin pdip 0 o c to +70 o c dvdd = 4.5v, avdd = 5.5v cm102-a/102s 18-pin sop 0 o c to +70 o c dvdd = 4.5v, avdd = 5.5v outline of dimensions dimensions shown in inches and (mm) 18- plastic dual-in-line packaging (pdip) 18- pin sop figure 3 ?g mechanical dimension of cm102-a figure 4 ?g mechanical dimension of cm102s
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 7 - table of contents 1. description and overview 2 2. ordering information 6 3. pin/signal descriptions 9 3.1 clock pin 9 3.2 analog i/o 9 3.3 power / ground 9 3.4 configuration / gpio 10 4. vr mapping table 11 5. vendor specific request for gpio access 12 6. usb descriptors 13 6.1 device descriptors 13 6.2 configuration descriptor 13 6.3 usb audio topology diagram 14 7. electrical characteristics 15 7.1 absolute maximum rating 15 7.2 operation conditions 15 7.3 electrical parameters 15 7.4 audio performance 16 8. frequency response graphs 17 8.1 audio performance 17 8.2 line output series capacitors: 1000 f 17 9. application circuit reference 18
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 8 - 10. list of figures figure 1 ?g pin assignments (top view) 3 figure 2 ?g block diagram of cm102-a/102s 5 figure 3 ?g mechanical dimension of cm102-a 6 figure 4 ?g mechanical dimension of cm102s 6 figure 5 ?g topology diagram 14 figure 6 ?g frequency response of cm102-a/s with 220 g f series capacitor 17 figure 7 ?g frequency response of cm102-a/s with 1000 g f series capacitor 17 figure 8 ?g application circuit of cm102 rev 1.6 18
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 9 - 3. pin/signal descriptions 3.1 clock pin these signals connect cm102-a/cm102s to external clock source signal. signal name type pin no description xo o 3 clock output pin for 12mhz oscillator. xi i 4 clock input pin for 12mhz oscillator. 3.2 analog i/o these signals connect cm102-a/cm102s to analog signals, external vr, and decouple capacitor. signal name type pin no description vref o 11 connect to external decouple capacitor for embedded bandgap. voladj i 12 0 ~ 2.25v input for volume adjustment by external vr; pull high to disable vr volume adjustment function. lol o 14 line out left channel. lor o 15 line out right channel. usbdp i/o 7 usb data d+. usbdm i/o 8 usb data d-. 3.3 power / ground analog vdd is 5v, digital vdd is 3.3v and 5v. analog ground plane and digital ground plane should be separated well. signal name type pin no description dvdd1 i 5 5v digital power. dvdd2 o 6 3.3v voltage from internal regulator for decouple capacitor connection. it is not affected by power down mode and can be used to connect usb pull up resistor. dvss i 9 digital ground. avdd i 13 5v analog power. avss i 16 5v analog ground.
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 10 - 3.4 configuration / gpio these signals are for various configuration and gpio. signal name type pin no description paen i 1 power amplifier enable; h ? normal mode, l ? power down power amplifier. gpio i/o 2 gpio pin, default is input mode after reset; accessible by usb vendor specific request. test i 10 t est mode select pin; pull low in normal mode operation. spdif out o 17 this pin is used for spdif out. pdsw o 18 power down switch control. h - normal mode, l - power down mode. paen / gpio / test: internal pull down via 100k ? resistor.
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 11 - 4. vr mapping table voladj (pin 12) can be pulled high to disable external vr volume adju stment function. voltage level set by external vr can change the cm102- a/cm102s volume control value according to the following table. input dc voltage relative to 2.25v adjust value added to volume control (unit : dac step) input dc voltage relative to 2.25v adjust value added to volume control (unit : dac step) >= 96.5 % -37 (mute) 48.5 ~ 50 % 0 95 ~ 96.5 % -30 47 ~ 48.5 % +1 93.5 ~ 95 % -29 45.5 ~ 47 % +2 92 ~ 93.5 % -28 44 ~ 45.5 % +3 90.5 ~ 92 % -27 42.5 ~ 44 % +4 89 ~ 90.5 % -26 41 ~ 42.5 % +5 87.5 ~ 89 % -25 39.5 ~ 41 % +6 86 ~ 87.5 % -24 38 ~ 39.5 % +7 84.5 ~ 86 % -23 36.5 ~ 38 % +8 83 ~ 84.5 % -22 35 ~ 36.5 % +9 81.5 ~ 83 % -21 33.5 ~ 35 % +10 80 ~ 81.5 % -20 32 ~ 33.5 % +11 78.5 ~ 80 % -19 30.5 ~ 32 % +12 77 ~ 78.5 % -18 29 ~ 30.5 % +13 75.5 ~ 77 % -17 27.5 ~ 29 % +14 74 ~ 75.5 % -16 26 ~ 27.5 % +15 72.5 ~ 74 % -15 24.5 ~ 26 % +16 71 ~ 72.5 % -14 23 ~ 24.5 % +17 69.5 ~ 71 % -13 21.5 ~ 23 % +18 68 ~ 69.5 % -12 20 ~ 21.5 % +19 66.5 ~ 68 % -11 18.5 ~ 20 % +20 65 ~ 66.5 % -10 17 ~ 18.5 % +21 63.5 ~ 65 % -9 15.5 ~ 17 % +22 62 ~ 63.5 % -8 14 ~ 15.5 % +23 60.5 ~ 62 % -7 12.5 ~ 14 % +24 59 ~ 60.5 % -6 11 ~ 12.5 % +25 57.5 ~ 59 % -5 9.5 ~ 11 % +26 56 ~ 57.5 % -4 8 ~ 9.5 % +27 54.5 ~ 56 % -3 6.5 ~ 8 % +28 53 ~ 54.5 % -2 5 ~ 6.5 % +29 51.5 ~ 53 % -1 3.5 ~ 5 % +30 50 ~ 51.5 % 0 <=3.5 % +37
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 12 - 5. vendor specific request for gpio access gpio write offset field size value (hex) description 0 bmrequesttype 1 43 1 brequest 1 01 2 wvalue 2 value bit 0: gpio value bit 1: 1: output; 0: input 4 windex 2 0000 6 wlength 2 0000 gpio read offset field size value (hex) description 0 bmrequesttype 1 c3 1 brequest 1 81 2 wvalue 2 value bit 0: gpio value bit 1: 1: output; 0: input 4 windex 2 0000 6 wlength 2 0001
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 13 - 6. usb descriptors the audio and control data are transferred to cm102-a/cm102s via usbd p (pin 7) and usbdm (pin8) in full-speed, which correspond to d+ a nd d- in the usb specifica tion. the descriptors are listed for design reference. 6.1 device descriptors offset field size value (hex) description 0 blength 1 12 total 18 bytes. 1 bdescriptortype 1 01 device descriptor. 2 bcdusb 2 0110 usb specification comptible. 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 0001 product id. 12 bcddevice 2 0010 14 imanufacturer 1 01 index of strin g descriptor describing manufacturer. 15 iproduct 1 02 index of strin g descriptor describing product. 16 iserialnumber 1 00 index of strin g descriptor describing the device?s serial number. 17 bnumconfiguratio ns 1 01 configurations number = 1. 6.2 configuration descriptor the following information is described in the configuration descriptor.
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 14 - offset field size value (hex) description 0 blength 1 09 total 9 bytes. 1 bdescriptortype 1 02 configuration descriptor. 2 wtotallength 2 006e t otal len g th of data returned for this configuration: 110 bytes. 4 bnuminterfaces 1 02 number of interfaces supported by this configuration: 0: control interface. 1: iso-out interface. 5 bconfigurationvalu e 1 01 6 iconfiguration 1 00 7 bmattributes 1 80 bus power and non support remote wakeup. 8 bmaxpower 2 fa maximum power consumption of the usb device: 500ma. 6.3 usb audio topology diagram it usb ot speaker feature unit figure 5 ?g topology diagram
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 15 - 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 v oltage 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 tstg storage temperature range -40 to +125 j esd (hbm) esd human body mode 3500 v esd (mm) esd machine mode 200 v 7.2 operation conditions parameter 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 - - 50 ma operating ambient temperature 0 - 70 j 7.3 electrical parameters parameter min typ max unit vr input resolution - 5 - bit input range 0 - 2.25 v clock clock input frequency 11.994 12 12.006 mhz pll1 output frequency - 48 - mhz pll2 output frequency - 12.288 - mhz amplification volume control level -33 - +6 db volume control step (1) - 37 - steps note: 1) with an additional mute step
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 16 - 7.4 audio performance parameter min typ max unit dac resolution - 16 - bits thd + n (-3dbr) -66 - - db snr 82.1 - - db silent snr 90.5 - - db dynamic range 82.7 - - db frequency response 20 - 20k hz output voltage (rms) - 1.1 - vrms output voltage swing 0.7 - 3.8 v power amplifier power supply 4.5 5.0 5.5 v thd + n (-3dbr) -53.5 - - db snr 82 - - db silent snr 103 - - db dynamic range 83.4 - - db output voltage (rms) - 1.34 - vrms output voltage swing - - 4.50 vpp v maximum output power per channel (rms value, 4 ohm load) 0.308 - 0.427 w maximum output power per channel (rms value, 6 ohm load) 0.291 - 0.368 w maximum output power per channel (rms value, 8 ohm load) 0.248 - 0.316 w
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 17 - 8. frequency response graphs 8.1 line output series capacitors : 220f c-media 01/29/01 18:06:34 digital playback (pc-d-a) for line output frequency response wl-multitone-48k.at2 color line style thick data axis c yan solid 3 fa s tte s t.c h .1 am pl!n o rm alize l eft yellow solid 3 fasttest.ch.2 ampl!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 30 10k 50 100 200 500 1k 2k 5k hz figure 6 ?g frequency response of cm102-a/s with 220f series capacitor 8.2 line output series capacitors : 1000f c-media 01/29/01 18:16:17 digital playback (pc-d-a) for line output frequency response wl-multitone-48k.at2 color line style thick data axis cyan solid 3 fasttest.ch.1 ampl!normalize left yellow solid 3 fasttest.ch.2 ampl!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 30 10k 50 100 200 500 1k 2k 5k hz figure 7 ?g frequency response of cm102-a/s with 1000f series capacitor
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 18 - 9. application circuit reference figure 8 ?g application circuit of cm102-a/s rev 1.6
cm102-a/102s integrated 2 channel usb audio controller date: 05/21/2003 version: 1.4 - 19 - 10. reference usb-if, usb specification, revision 1.1 and 2.0, and usb audio device class specification, revision 1.0,. ?e end of specifications ?e 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 ?g sales@cmedia.com.tw url ?g http://www.cmedia.com.tw

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