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SN11113 spec 1 SN11113 usb audio controller data sheet 2003 march 5th, version 1.01
SN11113 spec 2 i. description sonix SN11113 is an usb audio controller. it supports 32khz, 44.1khz and 48khz sampling rate in digital playback and recording; 44.1khz and 48 khz sampling rate in analog audio playback and recording. in digital playback mode, it receives audio stream from pc via usb interface and transmits audio data according to the aes/ebu, iec60958, s/pdif consumer interface standards. in analog playback mode, it supports ac 97 codec for analog playback. in digital recording mode, it receives s/pdif digital audio input and sends back to pc through usb. three sampling rates; includes 32 khz, 44.1 khz, and 48 khz; are automatically locked internally. in analog recording mode, 44.1khz and 48 khz sampling rate are supported by analog audio recording. totally one control pipe, two isochronous pipes, and one interrupt pipe are supported by SN11113. ii. features supports aes/ebu, iec60958, s/pdif consumer formats for stereo pcm data 32k, 44.1k and 48khz sampling rate for 2 channel playback in digital mode conveys ac-3 data stream by s/pdif output 44.1k and 48khz sampling rate for 2 channel playback in analog mode supports digital recording function with 32khz, 44.1khz and 48khz sampling rate supports analog recording function with 44.1khz and 48khz sampling rate supports scms (serial copy management system) copy protection full-duplex playback/ recording audio stream without sound card in pc compatible with win98 se/ winme/ win2000/ winxp and macos 9.2.1 / macos10.1 without additional driver plug-and-play operation with microsoft os or macos default drivers compliant with usb specification v1.1 compliant with usb audio device class specification v1.0 supports usb full speed 12mbits/s serial data transmission usb bus powered operation supports suspend/resume and remote wake-up 6mhz crystal input with on-chip pll and embedded transceiver for usb
SN11113 spec 3 usb audio function topology has four input terminals, three output terminals, one selector unit, one mixer unit, and six feature units alternate setting0 is a zero-bandwidth setting; used to release the claimed bandwidth on the bus when this device is inactive isochronous transfer uses adaptive, synchronous and asynchronous synchronization supports ac?97 component specification v2.1 and v2.2; ac link interface for external ac97 audio codec compliant with usb hid class specification v1.1; pin control for volume up / down, play mute, and record mute supports two wire series bus interface; slave only interface with transfer speed up to 400kbps(fast-mode) eeprom interface for customized usb ids and codec programming 3.3 v core operation and 5 v tolerant i/o available in 64-pin lqfp(10x10 mm) system on chip solution: low cost and easy implementation without external memory led indicator pins for playback and recording mute features programmable by jumper pins iii. ordering information SN11113f : 64-pin lqfp (10x10x1.4 mm) iv. block diagram - clk generator d+ d- me mor y fifo parallel / serial eep ro m interface pll ledn digital receiver s/pdif out s/pdif in s/pdif de code r serial / parallel ac'97 controller ac din scl sda bitclk acrstn acsync acdo ut cs sk dw dr processor mcu interface vo lup vo ldn mutep muter pdsw (type0, type1, type2, type3, pllen, rec o rd) hidmuter m u x us er data bi ts preamble validity audio data channel s tatus bits parity aux data sof cmpclk xiau d xo a ud usb dpll transceiver xius b xo us b rs tn
SN11113 spec 4 v. pin description 5.1 sn 11113 pin chart (64-pin lqfp) usb audio controller SN11113 15 10 15 35 40 45 50 55 60 20 25 30 rvdd type2 sda pdsw sof vdd nc vss rstn type1 nc nc rvss ledn scl spdifi spdifo sk dw vss vdd xvss1 xousb dr xiusb cs rv dd nc nc xiaud xoaud xvss2 nc acdin vdd xvdd2 vss rvss rvdd volup bitclk acsync rvss nc record 40 35 45 hidmuter mutep pll en avss avdd vdd usbdp vss tavdd usbdm tavss a cdout voldn xv dd1 muter acrstn ty pe0 cmpclk ty pe3 5.2 pin assignment and description (64-pin lqfp) pin no. pin name pin type description 1 type1 i, st product type setting pin1 2 nc 3 nc
SN11113 spec 5 4 type2 i, st product type setting pin2 5 rstn i, st, pu system reset pin, pull low to reset 6 pdsw o, 4ma, sr power down switch control -- 0: normal mode, 1: power down mode 7 sof o, 4ma, sr usb sof (start of frame) pin provides 1khz signal 8 vdd p power pin 9 vss p power pin 10 nc 11 rvdd p power pin for pad 12 sda i/o, 4ma, sr iic data pin for external mcu control 13 scl i, st iic clock pin for external mcu control 14 rvss p power pin for pad 15 ledn o, 8ma, sr led indicator pin, output low after power on reset, toggle during operation 16 spdifi i, st input pin for spdif signal 17 muter i, st recording mute, edge trigger with 64ms de-bouncing circuit 18 xvdd1 p power pin for usb external crystal 19 xiusb i 6 mhz clock osc pin for usb pll 20 xousb o 6 mhz clock osc pin for usb pll 21 xvss1 p power pin for usb external crystal 22 vdd p power pin 23 vss p power pin 24 dr i, st eeprom data input fixing this pin to h or l sets usb vendor id to sonix usb vendor id (hex 0c45); pu or pd is used for different product id 25 dw o, 4ma, sr eeprom data output 26 spdifo o, 8ma, sr spdif data output 27 sk o, 4ma, sr eeprom clock pin 28 rvdd p power pin for pad 29 cs o, 4ma, sr eeprom chip select 30 nc 31 nc 32 acrstn o, 4ma, sr ac?97 codec reset 33 record i, st recording function enable (=1) 34 nc 35 rvss p power pin for pad 36 bitclk o, 8ma, sr ac?97 serial data clock 37 volup i, st volume up control, edge trigger with 64ms de-bouncing circuit 38 acsync o, 4ma, sr ac?97 codec sync (48 khz) signal 39 nc 40 acdin i, st ac?97 codec serial data input 41 vss p power pin 42 vdd p power pin 43 xvss2 p power pin for external crystal 44 xoaud o 12.288 mhz crystal output 45 xiaud i, st 12.288 mhz crystal input / connected to pll vco output 46 xvdd2 p power pin for external crystal 47 rvss p power pin for pad 48 rvdd p power pin for pad 49 type3 i, st product type setting pin3
SN11113 spec 6 50 cmpclk o, 4ma, sr pll comparator input 51 voldn i, st volume down control, edge trigger with 64ms de-bouncing circuit 52 acdout o, 4ma, sr ac?97 codec serial data 53 mutep i, st playback mute control pin, edge trigger with 64ms de-bouncing circuit 54 pllen i, st use pll (=1) or crystal at xiaud pin 55 vss p power pin 56 vdd p power pin 57 tavss p power pin for usb transceiver 58 usbdm i/o usb data minus 59 usbdp i/o usb data plus 60 tavdd p power pin for usb transceiver 61 avss p power pin for pll 62 avdd p power pin for pll 63 hidmuter o, 8ma, sr playback mute led indicator 64 type0 i, st product type setting pin0 ** all input pin are 5 volt tolerance, ttl level and schmitt trigger all output pins are slew rate control i ? input pin , o ? output pin, p ? power pin, st ? schmitt trigger, sr ? slew rate control, pu/pd ? pull up or pull down
SN11113 spec 7 vi. operating rating and electrical characteristics 6.1 absolute maximum rating symbol parameter value unit dvmin min digital supply voltage dgnd ? 0.3 v dvmax max digital supply voltage dgnd + 4.6 v avmin min analog supply voltage agnd ? 0.3 v avmax max analog supply voltage agnd + 4.6 v dvinout voltage on any digital input or output pin dgnd ?0.3 to 5.5 v avinout voltage on any analog input or output pin agnd ?0.3 to avdd + 0.3 v t stg storage temperature range -40 to +125 0 c esd (hbm) esd human body mode c=100pf, r=1.5k ? 5000 v esd (mm) esd machine mode 200 v i off leakage current 10 ua i latch minimum latch up current 100 ma 6.2 operation conditions symbol parameter value unit dvdd digital supply voltage +3 to +3.6 v avdd analog supply voltage +3 to +3.6 v t a operating ambient temperature range 0 to 70 0 c t j operating junction temperature range 0 to 115 0 c 6.3 dc electrical characteristics symbol parameter test condition value unit v di differential input sensitivity | (d+) ? (d-) | 0.2 (min) v v cm differential common mode range included v di range 0.8 (min) 2.5 (max) v v se single ended receiver threshold 0.8 (min) 2.0 (max) v v ih high level input voltage 2.0 (min) v v il low level input voltage 0.8 (max) v v oh high level output voltage i oh = -4 ma 2.3 (min) v v ol low level output voltage i ol = 4 ma 0.5 (max) v i il low level input current v i = 0 v rstn pin : - 50.0 (max) the other pins : - 3.0 (max) a
SN11113 spec 8 i ih high level input current v i = 3.6 v spdifi, xsdin pins : 3.0 (max) the other pins : 3.0 (max) a i dd input supply current 20 (max) ma isuspend supply current in suspend 20 (max) a 6.4 ac electrical characteristics 6.4.1 usb transceiver signal (full speed mode) symbol parameter test condition min max unit tr transition rise time for dp or dm 4 20 ns tf transition fall time for dp or dm 4 20 ns trfm rise / fall time matching (tr / tf ) * 100 90 110 % vo(crs) signal crossover voltage 1.3 2.0 v 6.4.2 operation clocks symbol parameter value unit clkin xiaud/xoaud crystal value bitclk serial data clock 12.288 (typ) mhz clkin duty cycle 50 2 % usbclkin xiusb/xousb crystal value 6 (typ) mhz usbclkin duty cycle 50 2 % 6.4.3 external eeprom interface symbol parameter value unit fsk sk pin clock frequency 200 khz 6.4.4 ac?97 audio codec interface timing please refer to ac?97 component specification ver2.1, ver2.2 6.5 system level power consumption reference values symbol parameter value unit isys_op usb device operation power consumption 100 (max) ma isys_suspend usb device suspend power consumption 304 (max) a
SN11113 spec 9 vii. function and control register description 7.1 controller topology ac-97 analog / digital playback and recording it 2 it 3 it 4 ot 6 ot 7 fu e fu a fu b fu c fu d ot 5 it 1 fu 9 mu f su 8 usb out mic in line in spdif in spdif out spk out usb in 7.2 topology setting and button function 7.2.1 topology setting (a) digital function only or analog function only 1. ac?97 d : only s/pdif in/out 2. imac(44.1k) : only ac?97 analog out, 44.1khz playback and recording without mixer 3. headset(44.1k & mixer) : only ac?97 analog out, 44.1khz playback and recording with mixer 4. headset(44.1/48k & mixer) : only ac?97 analog out, 44.1khz/48khz playback and recording with mixer
SN11113 spec 10 pin pd ac'97 d imac(44.1k) headset(44.1k & mixer) headset(44.1/48k & mixer) type0 0 0 0 0 type1 0 0 1 1 type2 0 1 0 1 1: bused power (500ma) 1: bused power (500ma) 1: bused power (500ma) 1: bused power (500ma) type3 0: bused power (100ma) 0: bused power (100ma) 0: bused power (100ma) 0: bused power (100ma) 1: use pll 1: use pll 1: use pll pllen always use pll 0: use crystal 0: use crystal 0: use crystal 1: d recording source, only spdif(def =spdif) 1: a recording source, only mic (def = mic) 1: a recording source, mic & line(def = mic) 1: a recording source, mic & line(def = mic) record 0: none 0: none 0: none 0: none (romopt, pllen) = (1,0) : 44.1k play/record rate & no hid, (1,1) : 44.1k play/record rate & hid 1: fit pc monitor & record gain ctrl 1: fit pc monitor & record gain ctrl muter button will mute monitor ch 0: muter button doesn't mute monitor ch romopt (romopt, pllen) = (0,0) : 48k play rate, 32k/44.1k/48khz record rate & hid (0,1) : 32k/44.1k/48khz play rate, 32k/44.1k/48khz record rate & hid 0: fit imac monitor & record gain ctrl 0: fit imac monitor & record gain ctrl muter button will mute monitor ch 1: muter button will mute monitor ch ?romopt? value is set by ?dr? pin when no eeprom is mounted on the board. pulling high or pulling low at dr pin can set ?romopt? value to be 1 or 0. when eeprom is used on the board, ?romopt? is defined by usb product id bit1. (b) digital + analog function 1. ac?97 a+d+rec(a) : digital and analog playback, analog recording only 2. ac?97 a+d+rec(a+d) : digital and analog playback, digital and analog recording 3. ac?97 a+d+h+rec(a) : digital and analog playback, analog recording only, usb hid function enable 4. ac?97 a+d+h+rec(a+d) : digital and analog playback, digital and analog recording, usb hid function enable pin pd ac'97 a+d+rec(a) ac'97 a+d+rec(a+d) ac'97 a+d+h+rec(a) ac'97 a+d+h+rec(a+d) type0 1 1 1 1 type1 0 0 1 1 type2 0 1 0 1
SN11113 spec 11 1: bused power (500ma) 1: bused power (500ma) 1: bused power (500ma) 1: bused power (500ma) type3 0: bused power (100ma) 0: bused power (100ma) 0: bused power (100ma) 0: bused power (100ma) 1: use pll 1: use pll 1: use pll 1: use pll pllen 0: use crystal 0: use crystal 0: use crystal 0: use crystal 1: a recording source, mic & line (def = mic) 1: a+d recording sources, mic & line & spdif (def = mic) 1: a recording source, mic & line (def = mic) 1: a+d recording sources, mic & line & spdif (def = mic) record 0: none 0: none 0: none 0: none 0: muter button doesn't mute monitor ch 0: muter button doesn't mute monitor ch 0: muter button doesn't mute monitor ch 0: muter button doesn't mute monitor ch romopt 1: muter button will mute monitor ch 1: muter button will mute monitor ch 1: muter button will mute monitor ch 1: muter button will mute monitor ch ?romopt? value is set by ?dr? pin when no eeprom is mounted on the board. pulling high or pulling low at dr pin can set ?romopt? value to be 1 or 0. when eeprom is used on the board, ?romopt? is defined by usb product id bit1. SN11113 can adopt two type clock sources for internal logic. one is using external pll and the other is using external crystal. ?pllen? pin is used to define clock source. when using external pll, it can synchronize to the usb frame rate. if the usb audio device uses pll as clock source and enables usb hid function, it can convey ac-3 data stream by vendor specific software when playing dvd on pc. ?record? pin is used to enable recording function. when the usb audio device having recording function is plugged into pc, there is a default recording source defined above table. if ?record? pin is pulled down, then the usb audio device has no recording function. 7.2.2 button function the SN11113 has four buttons to control playback and recording volume. it supports volume up, volume down, play mute, and recording mute. button function is only effective in analog terminal. 1m pull-up resistors connected to 3.3v are recommended for these pins. it supports remote wakeup from device. a device in the resume state may respond to pressing button event by signaling a wakeup to pc via the usb.
SN11113 spec 12 7.2.3 led indicator there are two led pins used to indicate the operation condition. ?ledn? is flashing in a 256ms period during playback and recording. ?hidmuter? lights up when pressing ?muter? button to enable recording mute function. 7.3 playback / recording sample rate under different product configuration product playback recording notes ac'97 a+d+rec(a), ac'97 a+d+rec(a+d), ac'97 a+d+h+rec(a), ac'97 a+d+h+rec(a+d) d : 48khz , a : 48khz d : 48khz/ 44.1khz , a : 48khz/ 44.1khz when playing ac3 data stream to digital output, mute analog output headset(44.1/48k & mixer) 44.1khz/ 48khz 44.1khz/ 48khz when playing 44.1khz , mute digital output imac(44.1k), headset(44.1k & mixer) 44.1khz 44.1khz when playing 44.1khz , mute digital output 44.1khz (romopt=1'b1, pllen=1'b1 / 1'b0) 44.1khz 48khz (romopt=1'b0 & pllen=1'b0) 32k/ 44.1k/ 48khz ac'97 d 32k/44.1k/48khz (romopt=1'b0 & pllen=1'b1) 32k/ 44.1k/ 48khz 7.4 audio output SN11113 supports 16-bit stereo pcm audio data output at 32k, 44.1k and 48khz sample rate. the audio data sent from usb is sent to both spdif out terminal (digital out) and speaker out terminal (analog out). ac?97 codec can be used at the speaker out terminal to get analog audio sound. if the device uses external pll and enable usb hid function, it can convey ac-3 data stream to s/pdif out terminal (digital out). 7.5 audio input SN11113 can record 16~24 bits stereo pcm audio data at 32, 44.1 and 48khz sample rate via s/pdif input. it converts incoming audio data format to 16 bits pcm data. in digital recording,
SN11113 spec 13 SN11113 supports scms (serial copy management system); if incoming digital audio data has copyright protection enabled, it will not record this audio data and send silent audio data to pc. because the digital audio data has its original data format (16~24bits) and sample rate, sample rate in recording software on pc should be set as the same rate when user wants to record this digital audio data. for analog audio data recording, it supports two sampling rate : 44.1khz and 48khz. 7.6 eeprom data storage pattern eeprom address high byte (msb to lsb) low byte (msb to lsb) notes 0 idvendor high byte idvendor low byte 1 idproduct high byte idproduct low byte 2 control word high byte control word low byte refer to the next table 3 reg address x programming ac?97 reg address 4 reg datah reg datal programming reg data 5 reg address x programming ac?97 reg address 6 reg datah reg datal programming reg data . reg address x programming ac?97 reg address . reg datah reg datal programming reg data * 16 bit per word at each address control word (address 02) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 r r cdcreg outsw regcnt3 regcnt2 regcnt1 regcnt0 chk7 chk6 chk5 chk4 chk3 chk2 chk1 chk0 bit 15 ? bit 14 r ? reserved bit 13 cdcreg ? 0 : programming with eeprom values 1: programming with SN11113 built-in values bit 12 outsw ? 0 : volume control aux. line out (ox04) 1 : volume control stereo line out (0x02) bit11 ? bit 8 regcnt [3:0] ? toatl number of programming ac?97 codec registers bit 7 ? bit 0 chk [7:0] ? eeprom magic code (hex ab), used to check eeprom existence programming example: bit 13 = 1, ignore setting in bit 11 to bit8 , using sn 11113 built-in programming values bit 13 = 0, regcnt [3:0] 0 ? using programming values stored in eeprom bit 13 = 0, regcnt [3:0] = 0 ? inhibition
SN11113 spec 14 ac?97 codec registers default values (1) imac mode address (hex) name setting value 04 alt. line output vol. 0000 2a ext. audio stat/control 0001 2c pcm front dac rate ac44 1a record select 0000 1c record gain 0000 18 pcm out volume 0808 32 pcm lr adc rate ac44 10 line in volume 8808 0e mic in volume 8008 (2) headset (44.1k & mixer) mode address (hex) name setting value 04 alt. line output vol. 0000 2a ext. audio stat/control 0001 2c pcm front dac rate ac44 1a record select 0000 1c record gain 0000 18 pcm out volume 0808 32 pcm lr adc rate ac44 10 line in volume 8808 0e mic in volume 0008 (3) the other modes address (hex) name setting value 04 alt. line output vol. 0000 2a ext. audio stat/control 0001 10 line in volume 8808 1a record select 0000 1c record gain 0000 18 pcm out volume 0808 0e mic in volume 0008 eeprom read sequence: idvendor (msb to lsb) idproduct (msb to lsb) control word programming reg address programming reg data ?
SN11113 spec 15 7.7 spdif spdif channel status block structure ?consumer format bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7 byte0 consumer audio/data copyright emphasis mode default 0 0(w) 1(w) 0 0 0 0 0 byte1 category code l default 0(w) 0(w) 0(w) 0(w) 0(w) 0(w) 0(w) 0(w) byte2 source number channel number 1 0 0 0 default 1 0 0 0 0 1 0 0 byte3 sampling frequency clock accuracy reserved 32khz 1100 44.1khz 0 000 default 48khz 0100 0 0 0 0 w : these bits can be programmed by vendor specific driver via usb.
SN11113 spec 16 viii. application 8.1 application example usb md , dat multimedia amplifier pc or notebook audio cd vcd, dvd audio data stream sonix SN11113 usb cable s/pdif out wav, mp3, or other audio ap dat, md, cd player with dat, md, cd player with dat, md, cd player with dat, md, cd player with s/pdif out s/pdif out s/pdif out s/pdif out s/pdif in ? etc. line-in / microphone in line-in / microphone in line-in / microphone in line-in / microphone in line-out line-out line-out line-out ac'97 codec ac'97 codec ac'97 codec ac'97 codec ac link ac link ac link ac link ac-3 decoder 8.2 brief application circuit chart SN11113 ac97 codec 93c46 usb p c eeprom line out line in ac link s/pdif in s/pdif out led n, hidmuter programmable jumper pins type0, type1, type2, type3, pllen, record mcu interface sof, cmpclk, pdsw 6 mhz ( volup, voldn, mutep, muter ) push buttons 12.288mhz mic in * detail application circuit is available by customer request
SN11113 spec 17 ix. package specification d d 1 1 1 6 1 7 32 33 48 49 64 e b e l 1 a2 a 1 c l (0.6) e 1 (0 0 ~ 7 0 ) 64-pin lqfp package lead count body size d e d1 e1 64 10.00 10.00 12.00 12.00 stand-off body thk lead length lead width lead thk lead pitch a1 a2 l1 b c e 0.10 1.40 1.00 0.24 0.125 0.50 unit : mm
SN11113 spec 18 appendix a two wire series bus in SN11113 to provide extension capability, SN11113 contains a two wire series bus circuitry as an interface to mcu. the two wire series bus serves as a slave device with bit rate up to 400kbps (fast mode). mcu can write two bytes to SN11113 with 8-bit register address 8?bxxxxxxx0 and 8?bxxxxxxx1; where ?x? means either ?0? or ?1?. mcu can also read one byte from sn 11113 by any register address. the 7-bit slave address of SN11113 is assigned as 7?b0111000. with ?hiden? activated, SN11113 will transfer the two bytes to the usb host via an additional interrupt pipe when any byte is written to it by mcu. accompany with the two bytes two wire series bus data, SN11113 will also send one byte of button status. the sequence of the upward hid report is the button status first (lsb), then register with address 8?bxxxxxx0, then register with address 8?bxxxxxx1 (msb). the usb host will keep polling the upward hid report every 32ms. when there is any button pressed or released, or two wire series bus data coming, SN11113 will transfer the three bytes of hid report to the usb host. SN11113 can also transfer one byte data from the usb host to its register when ?hiden? is active. this is accomplished by a ?set output report? hid class request via default control pipe. mcu can get this downward byte by polling. that is, mcu should read the byte at its favorite rate. this document just provides simple description of the two wire series bus. user can get more detailed explanation from the specification. SN11113 has one input pin ?scl? where it gets two wire series bus clock from mcu, and one open-drain output pin ?sda? where it sends or receives serial signal to/from mcu. as shown below, ?sda? should be stable when ?scl? is high, and can have transition only when ?scl? is low.
SN11113 spec 19 start and stop conditions shown below are the exception. every two wire series bus transaction begins from a start, and ends with a stop, or another start (repeated start). the figure below demonstrates a typical two wire series bus transaction. after every 8 bits sent by the transmitter, the receiver should send one bit low for positive acknowledgement or one bit high for negative acknowledgement. after the negative acknowledgement, a stop or repeated start should follow. the next figure shows more detailed about acknowledgement bit. note that ?scl? is always driven by the master.
SN11113 spec 20 the figure below shows a complete data transfer. after a start, mcu should send 7-bit slave address (7?b0111000) first, and then the 8 th bit denotes a read transfer when it?s high; or a write transfer when it?s low. the first acknowledgement is always a duty of SN11113. in the write transfer, mcu keep acting as the master and the transfer direction is not changed. the following figure gives an example of one byte write transfer. SN11113 regards the first data byte as the register address. the second data byte is the content that mcu would like to write at the register address. if there is the third data byte, SN11113 will record this byte to the other register address. note that the register address is auto-increment. the figure below shows an example of two bytes read transfer. because SN11113 has only one byte register to be read, the second data byte will be the same as the first one.
SN11113 spec 21 please note that the usb host try to get new hid data every 32ms. it?s quite slow. if the continuous two wire series bus write transfers are too close in time, the former transfer may have no effect.
SN11113 spec 22 sonix technology co., ltd headquarters: 9f, no. 8 lane 32, hsien chen 5th st. chupei city, hsinchu, taiwan r.o.c. tel:886-3-5510520 fax:886-3-5510523 http://www.sonix.com.tw taipei office: 15f-3, no. 171, song ted road, taipei, taiwan r.o.c. tel:886-2-27591980 fax:886-2-27598180 hongkong office: flat 3 9f energy plaza 92 granville road, tsimshatsui east kowloon tel:002-852-27238086 fax:002-852-27239179 e-mail:sonix@ismart.net

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