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ss best usb audio i/o controller for headset and multi-media devices CM108 high integrated usb audio i/o controller datasheet 1.5 c-media electronics inc. tel: 886-2-8773-1100 fax: 886-2-8773-2211 6f, 100, sec. 4, civil boulevar d, taipei, taiwan 106, r.o.c. for detailed product information, please contact tu sales@cmedia.com.tw ut
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 1 - notices this document is provided ?as is? with no warranties what so ever, including any warranty of merchant abi lity, noninfringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, document or sample. all rights reserved. no part of this 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) 2003-2004 c-media electronics inc. all rights reserved. all content included on this document, such as text, graphics, logos, button icons, images, audio clips, digital downloads, data compilations, and software, is either the exclusive property of c-media electronics inc., its affiliates (collectively, "c-media"), its content suppliers, or its licensors and protected by republ ic of china and international copyright laws. u trademarks c-media, the c-media logo, xear 3d, xear 3d logo, speaker shifter, smart jack, and smart audio jack are trademarks of c -media electronics inc. in r epublic of chin a and/or other countries. all other brand and product names lis ted are trademarks or re gistered trademarks of their respective holders and are hereby recognized as such. *c-media reserves the right to modify th e specifications wit hout further notice*
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 2 - table of contents 1. description and overview 2. features 3. pin descriptions 3.1 pin assignment by pin number 3.2 pin-out diagram 3.3 pin signal descriptions 4. i2s interface 5. block diagram 6. ordering information 7. function descriptions 7.1 usb interface 7.1.1 device descriptor 7.1.2 configuration descriptor 7.1.3 content format for 94c46 7.1.4 usb audio topology diagram 7.2 jumper pins and mode setting 7.2.1 mode pin and msel pin 7.2.2 mode pin and pwrsel pin 7.2.3 vsel pin 7.3 hid feature 7.4 internal registers
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 3 - 8. electrical characteristics 8.1 absolute maximum rating 8.2 operation conditions 8.3 electrical parameters 8.4 audio performance 9. frequency response graphs 9.1 digital playback for line output frequency (10k ohm loading) 9.1.1 frequency response 48ks/sec 9.1.2 frequency resp onse 44.1ks/sec 9.2 digital playback for line output frequency (32 ohm loading) 9.2.1 frequency response 48ks/sec 9.2.2 frequency resp onse 44.1ks/sec 9.3 digital recording for line output frequency 9.3.1 frequency response 48ks/sec 9.3.2 frequency resp onse 44.1ks/sec 10. reference appl ication circuit
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 4 - 1. description and overview CM108 is a highly integrated single chip usb audio solution. all ess ential analog modules are embedded in CM108, includ ing dual dac and earphone driver, adc, microphone booster, pll, regulator, and usb transceiver. it is very suitable for usb headset, usb earphone or usb audio interface box application. many feat ures are programmable with jumper pins or external eeprom. in addition, audio adjustment can be easily controlled via specific hid compliant volume control pins. for value added application, external codec or audio dsp can be connected to CM108 via i 2 s pin for further processing. 4 gpio pins can be accessed with customer application software for additional value added application. 2. features compliant with usb 2.0 full speed operation compliant with usb audio devi ce class specification v1.0 supports usb suspend / resume mode and remote wakeup with volume control pins single 12mhz crystal input with on-chip pll and embedded usb transceiver jumper pin for speaker mode (playback only) or headset mode (playback + recording) for headset mode, usb audio function t opology has 2 input terminals, 2 output terminals, 1 mixer unit, 1 sele ctor unit, and 3 feature units jumper pin for mixer unit e nable / disable under headset mode for speaker mode, usb audio function topology has 1 input terminal, 1 output terminal, and 1 feature unit support one control endpoint, one isochr onous out endpoint, one isochronous in endpoint, and one interrupt in endpoint
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 5 - alternate zero bandwidth setting for rel easing playback bandwidth on usb bus when this device is inactive supports aes/ebu, iec60958, s/pdif consumer formats for stereo pcm data at s/pdif output volume up, volume down, and playback mute pins support usb hid device class fo r host control synchronization record mute pin with led indicator for record mute status external eeprom interface for vendor spec ific usb vid, pid, and serial number eeprom write function via vendor s pecific request for mass production convenience customized embedded vid, pid, and product string by customer request 4 gpio pins with read/write via hid interface jumper pin to set the output voltage swing (3.5v or 2.5v) jumper pin to set the power mode (100m a or 500ma, bus power or self power) isochronous transfer uses adaptive mode wit h internal pll for synchronization 48k / 44.1khz sampling rate for both playback and recording soft mute function embedded high performance 16-bit audi o dac with earphone phone amplifier host side data loss noise reduction function embedded 16-bit adc input with microphone boost embedded power-on-reset block embedded 5v to 3.3v regulator for single external 5v operation compatible with win98 se / wi n me / win 2000 / win xp and mac os9 / os x without additional driver 48 pin lqfp package
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 6 - 3. pin descriptions 3.1 pin assignment by pin number pin # si g nal name pin # si g nal name pin # si g nal name pin # si g nal name 1 spdifo 13 gpio3 25 ao 37 regv 2 dw 14 dvss1 26 ai 38 msel 3 dr 15 gpio4 27 ai 39 volup 4 sk 16 sdin 28 p 40 pdsw 5 cs 17 adscls 29 ao 41 usbdp 6 muter 18 mutep 30 ao 42 usbdm 7 pwrsel 19 adlrck 31 ao 43 gpio1 8 xi 20 admclk 32 ao 44 sdout 9 xo 21 ledr 33 avss2 45 ramclk 10 mode 22 adsel 34 avdd2 46 dalrck 11 gpio2 23 test 35 dvdd 47 dascls 12 ledo 24 ao 36 dvss2 48 voldn 3.2 pin-out diagram CM108 spdifo dw dr sk cs muter pwrsel xi xo mode gpio2 ledo dvss2 dvdd avdd2 avss2 lor lobs lol avdd1 vsel micin vref vbias gpio3 dvss1 gpio4 sdin adsclk mutep adlrck admclk ledr adsel test avss1 voldn dasclk dalrck damclk sdout gpio1 usbdm usbdp pdsw volup msel regv 1 13 25 37 pin assignments (top view) CM108
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 7 - 3.3 pin signal descriptions pin # symbol type description 1 spdifo do, 8ma, sr spdif output 2 dw dio, 8ma, pd, 5vt eeprom interface data read from eeprom 3 dr do, 4ma, sr eeprom interface data write to eeprom 4 sk do, 4ma, sr eeprom interface clock 5 cs do, 4ma, sr eeprom interface chip select 6 muter di, st, pu mute recording (edge trigger with de-bouncing) 7 pwrsel di, st chip power select pin, worked with mode pin speaker mode h self power with 100ma l bus power with 500ma headset mode h bus power with 100ma l bus power with 500ma ( h: pull up to 3.3v; l: pull down to ground ) 8 xi di input pin for 12mhz oscillator 9 xo do output pin for 12mhz oscillator 10 mode di, st operating mode select h speaker mode - playback only l headset mode - playback & recording ( h: pull up to 3.3v; l: pull down to ground ) 11 gpio2 dio, 8ma, pd, 5vt gpio pin 12 ledo do, sr, 8ma led for operation; output h for power on; toggling for data transmit 13 gpio3 dio, 8ma, pd, 5vt gpio pin 14 dvss1 p digital ground 15 gpio4 dio, 8ma, pd, 5vt gpio pin
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 8 - 16 sdin dio, 8ma, pd, 5vt adc i2s data input 17 adsclk dio, 4ma, sr adc i2s serial clock 18 mutep di, st, pu mute playback (edge trigger with de-bouncing) 19 adlrck do, 4ma, sr adc i2s left / right clock 20 admclk dio, 4ma, sr 11.2896mhz output for 44.1khz sampled data and 12.288mhz output for 48khz sampled data 21 ledr do, sr, 8ma led for mute record ing indicator; output h when recording is muted 22 adsel di, st, pd adc input source select pin h: use external (via i2s) adc l: use internal adc ( h: pull up to 3.3v; l: pull down to ground ) 23 test di, st, pd test mode select pin; h: test mode l: normal operation ( h: pull up to 3.3v; l: pull down to ground ) 24 avss1 p analog ground 25 vbias ao microphone bias voltage supply (4.5v), with a small driving capability 26 vref ao connecting to external decoupling capacitor for embedded bandgap circuit; 2.25v output 27 micin ai microphone input 28 vsel ai line out voltage swing select h: line out vpp = 3.5 volts l: line out vpp = 2.5 volts ( h: pull up to 5v; l: pull down to ground ) 29 avdd1 p 5v analog power for analog circuit 30 lol ao line out left channel 31 lobs ao dc 2.25v output for line out bias
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 9 - 32 lor ao line out right channel 33 avss2 p analog ground 34 avdd2 p 5v power supply for analog circuit 35 dvdd p 5v power supply for internal regulator 36 dvss2 p digital ground 37 regv ao 3.3v reference output for internal 5v 3.3v regulator 38 msel di, st mixer enable select, worked with mode pin h: with mixer / aa-path enable (with default mute) l: without mixer / aa-path disable ( h: pull up to 3.3v, l: pull down to ground ) usb descriptors will also be changed accordingly 39 volup di, st, pu volume up (edge trigger with de-bouncing) 40 pdsw do, 4ma , od power down switch control signal (for pmos polarity) 0: normal operation, 1: power down mode (suspend mode) 41 usbdp aio usb data d+ 42 usbdm aio usb data d- 43 gpio1 dio, 8ma, pd, 5vt gpio pin 44 sdout do, 4ma, sr dac i2s data output 45 damclk do, 4ma, sr 11.2896 mhz output for 44.1khz sampled data and 12.288 mhz output for 48khz sampled data 46 dalrck do, 4ma, sr dac i2s left/right clock 47 dasclk do, 4ma, sr dac i2s serial clock 48 voldn di, st, pu volume down (edge trigger with de-bouncing) u note u : di / do / dio ? digital input / output / bi-directional pad ai / ao / aio ? analog input / output / bi-directional pad sr ? slew rate control st ? schmitt trigger pd / pu ? pull down / pull up 5vt ? 5 volt tolerant (3.3v pad) od ? open drain
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 10 - 4. i2s interface CM108 provide i p 2 p s interface for both playback and record ing. external adc, dac, or dsp can be added to provide additional function in the usb audio system. CM108 sends out the master clock (fixed at x256), l rck (fixed at x64), and data clo ck. therefore external adc, dac, or dsp should be set at slave mode for i p 2 p s interface. left channel of i p 2 p s bus is used for CM108 mono recording. both i p 2 p s buses use 5v tolerant pad so they can be easily interfacing with 5v or 3.3v devices. playback data is simultaneously sent to both dac and i p 2 p s bus. recording source (from adc or from i p 2 p s bus) can be selected by adsel jumper pin. lrck sclk msb -1 -2 +2 +1 lsb msb -1 -2 +2 +1 lsb sdata left channel right channel
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 11 - 5. block diagram block diagram of CM108 usb trx usb interface usb control iso out processing pll1 48 mhz clock gen 12 mhz vref (2.25v) power on reset reset bandgap 3.3v 5 -> 3.3 regulator regv iso in processing sram 16 bit adc 16 bit dac +12 ~ -33 db 32 steps lol interface logics muter voldn volup vref mutep lor ledo ledr pdsw vbias 4.5v eeprom interface cs sk dw dr usbdp usbdm micin vref + - lobs gpio +20db boost enable pwrsel mode msel iis i/f spdifo 0 ~ -45db 38 steps 0 ~ -45db 38 steps 16 bit dac +22.5 ~ 0 db 16 steps
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 12 - 6. ordering information model number package operating ambient temperature supply range CM108 48-pin lqfp 7mm7mm1.4mm (plastic) 0 o c to +70 o c dvdd = 5v, avdd = 5v outline dimensions * dimensions shown in inches and (mm) 48-lead thin plastic quad flatpack (lqfp) ordering information of CM108
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 13 - 7. function descriptions 7.1 usb interface CM108 integrates usb transceiver, pll, and regulator. so only a few passive components are necessary for th e usb interface connection. de fault usb descriptors are embedded in CM108; therefor e no additional design effort is needed for usb operation. pid will be changed with the mode pin setting, so di fferent setting will have different pid. for customized product, customer can attach a 93c46 eeprom to override the embedded vid, pid and provide addition serial number for each set. CM108 will automatically detect the 93c46 existence and performs the over write function during power up. 7.1.1 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 40 endpoint zero size = 64 bytes 8 idvendor 2 0d8c vendor id 10 idproduct 2 0008 ~ 000f product id programmable by msel and mode pin 12 bcddevice 2 0100 device compliant to the audio device class specification version 1.00 14 imanufacturer 1 01 index of string descriptor describing manufacturer 15 iproduct 1 02 index of string descriptor describing product 16 iserialnumber 1 03 index of string descriptor describing the device?s serial number 17 bnumconfigurations 1 01 configurations number = 1 note : vid, pid, and serial number can be overridden by external eeprom content
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 14 - 7.1.2 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 total length of data returned for this configuration. programmable by msel and mode pin 4 bnuminterfaces 1 04 or 03 number of interfaces supported by this configuration, changed by mode pin. ep0: control interface ep1: iso-out interface ep2: iso-in interface (optional) ep3: int-in (hid) interface 5 bconfigurationvalue 1 01 6 iconfiguration 1 00 7 bmattributes 1 a0 or e0 programmable by pwrsel 8 bmaxpower 2 32 or fa maximum power consumption of the usb. programmable by mode and pwrsel pin 7.1.3 content format for eeprom (93c46) id code 2 bytes pid 2 bytes serial number 6 bytes unused address = 0 1w = 2bytes vid 2 bytes 670x where x = bit 4, 3, 2, 1 bit 2 serial number enable control 1: enable 0: disable bit 1 product string enable control 1: enable 0: disable
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 15 - 7.1.4 usb audio topology diagram it it ot ot usb out microphone in feature unit (volume) (mute) speaker out usb in feature unit (volume) (mute) id = 01 id =02 id = 0a id = 09 id = 06 id = 07 feature unit (volume) (mute) id = 0d mixer unit id = 0f selector unit id = 08 enable or disable by msel pin
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 16 - 7.2 jumper pins and mode setting: jumper pins can set the configuration of CM108. these jumper pi n settings affect both usb descriptors and usb audio topology. 7.2.1 mode pin and msel pin if mode pin is pulled high (speaker mode), a playback only function is activated and there is no recording function declared to the host. at this setting, m sel pin is ignored and only one input terminal, one output terminal and one feature unit is dec lared in usb audio topology. if mode pin is pulled low (heads et mode), a full duplex playba ck and recording function is reported to the host. msel pin setting ac tivates one mixer unit and one feature unit. when msel = 1, mixer is enable (aa-path enable), but with default mute setting; when msel = 0, mixer is disable (aa-path disable). the above usb audio topology (7.1.4) is an example of headset mode with mixer enable. 7.2.2 mode pin and pwrsel pin pwrsel pin affects the power configurati on of CM108; together wit h mode pin totally 4 combinations are programmable. mode combinations 3.3v gnd 3.3v speaker mode: playback only (self power with 100ma) headset mode: playback + recording (bus power with 100ma) pwrsel gnd speaker mode: playback only (bus power with 500ma) headset mode: playback + recording (bus power with 500ma) usb audio topology diagram 7.2.3 vsel pin vsel jumper pin sets the out put voltage swing. when vsel is connected to 5v, output voltage swing is 3.5vpp; when vsel is c onnected to ground, output voltage is 2.5vpp.
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 17 - 7.3 hid feature hid feature is provided by CM108 so user setting to volume up, volume down, and playback mute button pin is repo rted to the host to synchronize host side setting. in addition, all CM108 internal registers can be accessed via hid function call. 7.2.3 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 t hat 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 systems. typical exampl es of hid class devices include: - keyboards and pointing devices, for exampl e: mouse, trackballs, and joysticks. - front-panel controls, for example: knobs, switches, buttons, and sliders. - controls that might be f ound on devices such as vcr remote controls, games or simulation devices, for example: data gloves, throttles, and steering wheels. - devices that may not require human interact ion but provide data in a similar format to hid class devices, for example: bar-code readers, thermometers, or voltmeters. 7.2.4 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 03 nu mber of interface: 3 3 balternatesetting 1 00 alternate 0 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.
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 18 - 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 0030 numeric expression that is the total size of the optional descriptor: 48 bytes 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 83 in endpoint endpoint number = 3 3 bmattributes 1 03 interrupt endpoint type 4 wmaxpacketsize 2 0004 maximum packet size: 4 bytes 6 binterval 1 20 32ms 7.2.5 windows software architecture for hid note : please contact with our sales for the c-media sdk example if needed. pci enumerator usb class driver(usbd.sys) usb hub driver(usbhub.sys) usb hid class driver(hidclass.sys) gameport minidriver(hidgame.sys) gameport a udio drive r keyboard class driver mouse class driver joy stick class driver c-media sdk reports (device specification) winmm.dll direct input hid.dll applications user32.exe or user.exe
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 19 - 7.4 internal registers all internal registers of CM108 can be access ed via generic hid functional calls without the need to develop kernel mode driver. totally 4 by tes of data can be read or write from hid. input report is for read and output report is for wr ite. internal register s of CM108 are used to control gpio, s/pdif output, and eeprom data access. hid_ir0 (hid input report byte 0) offset : 0x00 bits read/write description default 7-6 r 00: hid_ir1 is used as gpi 10: values written to hid_ir0-3 are also mapped to eeprom_data0-1, eeprom_ctrl others: reserved 0x0 5-4 r reserved 0x0 3 r 0: no activity on record-mute button 1: record-mute button pressed then released 0x0 2 r 0: no activity on playback-mute button 1: playback-mute button pressed then released 0x0 1 r 0: volume-down button released 1: volume-down button pressed 0x0 0 r 0: volume-up button released 1: volume-up button pressed 0x0 hid_ir1 (hid input report byte 1) offset : 0x01 bits read/write description default 7-0 r when hid_ir0[7:6] == 2?b00: hid_ir1[3:0] is the input from gpio4 ~ gpio1 in input mode when hid_or0[7] == 1?b1: mapped from eeprom_data0 0x00
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 20 - hid_ir2 (hid input report byte 2) offset : 0x02 bits read/write description default 7-0 r when hid_or0[7] == 1?b1: mapped from eeprom_data1 0x00 hid_ir3 (hid input report byte 3) offset : 0x03 bits read/write description default 7-0 r when hid_or0[7] == 1?b1: mapped from eeprom_ctrl 0x00 hid_or0 (hid output report byte 0) offset : 0x04 bits read/write description default 7-6 r / w 0: hid_or1-2 are used for gpo; hid_or0, 3 are used for spdif 1: reserved 2: values written to hid_or0-3 are also mapped to eeprom_data0-1, eeprom_ctrl (see note) 3: reserved 0x0 5 r / w reserved 0x0 4 r / w when hid_or0[7] == 1?b0: valid bit in spdif frame when hid_or0[7] == 1?b1: reserved 0x0 3-0 r / w when hid_or0[7] == 1?b0: first nibble of spdif status channel when hid_or0[7] == 1?b1: reserved 0x0 note 1: when eeprom access is done , hid interrupt will occur. usb host can get the result from interrupt pipe (endpoint 3). note 2: hid_or0 is used for spdif when spdif_config[5] == 1?b0
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 21 - hid_or1 (hid output report byte 1) offset : 0x05 bits read/write description default 7-0 r / w when hid_or0[7:6] == 2?b00: hid_or1[3:0] is the output to gpio4 ~ gpio1 in output mode 0: gpo drives l 1: gpo drives h when hid_or0[7:6] == 2?b01: reserved when hid_or0[7:6] == 2?b1x: mapped to eeprom__data0 0x00 hid_or2 (hid output report byte 2) offset : 0x06 bits read/write description default 7-0 r / w when hid_or0[7:6] == 2?b00: hid_or2[3:0] is the mode setting for gpio4 ~ gpio1 0: set gpio to input mode 1: set gpio to output mode when hid_or0[7:6] == 2?b01: reserved when hid_or0[7:6] == 2?b1x: mapped to eeprom_data1 0x00 hid_or3 (hid output report byte 3) offset : 0x07 bits read/write description default 7-0 r / w when hid_or0[7] == 1?b0: category byte of spdif status channel when hid_or0[7] == 1?b1: mapped to eeprom_ctrl 0x00 note : hid_or3 is used for spdif when spdif_config[5] == 1?b0
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 22 - 8. electrical characteristics 8.1 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 3500 v esd (mm) esd machine mode 200 v 8.2 operation conditions 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 - - 70 ma suspend mode power consumption - - 300 ua operating ambient temperature 0 - 70 p o p c 8.3 electrical parameters min typ max unit dac (10k ohm loading) resolution - 16 - bits thd + n (-3dbr) - -74.29 - db snr - 93.6 - db silent snr - 98.2 - db dynamic range - 93.8 - db frequency response 48khz 20 - 20k hz frequency response 44.1khz 20 - 20k hz output voltage (rms) - 1.25 - vrms output voltage swing 0.5 - 4.0 v
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 23 - dac (32 ohm loading) resolution - 16 - bits thd + n (-3dbr) - -71.1 - db snr - 93.7 - db silent snr - 98.2 - db dynamic range - 93.8 - db frequency response 48khz 20 - 20k hz frequency response 44.1khz 20 - 20k output voltage (rms) - 1.25 - vrms output voltage swing 0.5 - 4.0 v adc resolution - 16 - bit thd + n (-3dbr) - -76.1 - db snr - 83.1 - db dynamic range - 81.6 - db frequency response 48khz 20 - 19.2k hz frequency response 44.1khz 20 - 17.6k hz input range 0 - 2.88 vpp amplification volume control level -45 - 0 db volume control step - 38 - steps microphone input boost gain - +20 - db gain adjustment range 0 - 22.5 db gain adjustment steps - 16 - steps mixer gain adjustment -33.0 - 12.0 db mixer gain adjustment steps - 32 - steps
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 24 - 9. frequency response graphs 9.1 digital playback for line output frequency (10k ohm loading) 9.1.1 frequency response 48ks/sec (10k ohm loading) c-media 07/15/03 19:03:14 digital playback (pc-d-a) for line output frequency response color line style thick data a xis green solid 2 fasttest.ch.1 ampl!normalize left yellow solid 2 fasttest.ch.2 ampl!normalize left - 6 +1 - 5 -4 - 3 -2 -1 + 0 d b r a 30 1 0 k 50 1 00 2 00 500 1k 2k 5 k hz 9.1.2 frequency response 44. 1ks/sec (10k ohm loading) c-media 07/15/03 19:05:40 digital playback (pc-d-a) for line output frequency response color line style thick data a xis green solid 2 fasttest.ch.1 ampl!normalize left yellow solid 2 fasttest.ch.2 ampl!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 2 0 1 0 k 50 1 00 2 00 500 1k 2k 5 k hz
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 25 - 9.2 digital playback for line output frequenc y (32 ohm loading) 9.2.1 frequency response 48ks/sec (32 ohm loading) c-media digital playback (pc-d-a) for line output frequency response color line style thick data a xis cyan solid 2 fasttest.ch.1 ampl!normalize left yellow solid 2 fasttest.ch.2 am p l!normalize left -6 +1 - 5 -4 - 3 -2 -1 + 0 d b r 1 2 0 1 0 k 50 1 00 2 00 500 1k 2k 5 k hz 9.2.2 frequency response 44. 1ks/sec (32 ohm loading) c-media digital playback (pc-d-a) for line output frequency response color line style thick data a xis green solid 2 fasttest.ch.1 ampl!normalize left yellow solid 2 fasttest.ch.2 ampl!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b 20 10k 50 100 200 500 1k 2k 5k hz
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 26 - 9.3 digital recording for line output frequency 9.3.1 frequency response 48ks/sec c-media 07/21/03 14:27:29 digital recording (a-d-pc) for line input frequency response color swee p trace line st y le thick data a xis comment 1 1 c y an solid 2 fasttest.ch.1 am p l!normalize left 1 2 yellow solid 2 fasttest.ch.2 am p l!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 30 10k 50 100 200 500 1k 2k 5k hz 9.3.2 frequency response 44.1ks/sec c-media 07/21/03 15:16:55 digital recording (a-d-pc) for line input frequency response color swee p trace line st y le thick data a xis comment 1 1 c y an solid 2 fasttest.ch.1 am p l!normalize left 1 2 yellow solid 2 fasttest.ch.2 am p l!normalize left -6 +1 -5 -4 -3 -2 -1 +0 d b r a 20 10k 50 100 200 500 1k 2k 5k hz
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 27 - 10. reference application circuit
CM108 integration dual dac, earphone driver, adc, microphone booster, pll, re gulator, and usb transceiver date: nov/01/2004 version: 1.5 - 28 - reference ? universal serial bus specification, version 2.0 ? universal serial bus device class defi nition for audio devices, version 1.0. ? universal serial bus device class definiti on for human interface devices, 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

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