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october 2012 doc id 023226 rev 2 1/13 AN4118 application note apwlink usb interface board for sound terminal ? demonstration boards introduction this document describes apwlink which has been designed as a usb interface board to control st sound terminal ? demonstration boards through apworkbench, please refer to user manual um1545, ?using the audio processor workbench (apworkbench)?. the orderable part number for apwlink is steval-cca035v1. figure 1. apwlink interface board (steval-cca035v1) www.st.com
contents AN4118 2/13 doc id 023226 rev 2 contents 1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 3.3 v digital power output to sound terminal ? demonstration board . . . . . 4 2.3 connection to sound terminal ? demonstration board . . . . . . . . . . . . . . . . 4 2.4 leds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.5 analog input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.6 external i 2 s input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.7 serial digital audio input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.8 jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 schematic and bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AN4118 overview doc id 023226 rev 2 3/13 1 overview in addition to providing control signals to the external sound terminal ? demonstration board, analog/digital audio inputs are also provided from apwlink. the system connections are shown below in the following figure. figure 2. system connections figure 3. apwlink general view usb cable apwlink sound terminal ? demonstration board analog source digital source apworkbench
configuration AN4118 4/13 doc id 023226 rev 2 2 configuration 2.1 power supply apwlink is directly powered by a usb cable (type b). no external power supply is needed. note that this power supply is not for the power bridge supply on the sound terminal ? demonstration board. please refer to the application note of each specific sound terminal ? demonstration board. 2.2 3.3 v digital power output to sound terminal ? demonstration board jumper j12 is used for the selection of the external sound terminal ? demonstration board digital power supply. when j12 is closed, 3. 3 vdc is provided to the external sound te r m i n a l ? demonstration board, and if the external sound terminal ? demonstration board has its own 3.3 v digital power supply, j12 has to be left open to avoid any current loop. 2.3 connection to sound terminal ? demonstration board apwlink is simply connected to the sound terminal ? demonstration board through j10, an on-board 16-pin female 8x2 2.54 mm connector as shown below. figure 4. connection to sound terminal ? demonstration board
AN4118 configuration doc id 023226 rev 2 5/13 2.4 leds apwlink provides the following three leds: d1: power supply ? on when usb power is supplied d2: communication wrong ? on when communication between pc and apwlink is wrong digital audio input error ? on when the digital input signal is not validated or no digital signal is input 2.5 analog input an analog signal (can be dc coupled) can be input from j9 (3.5 mm phone jack). there is an on-board adc (st part number: sta529q) to convert the analog signal to a digital i 2 s format signal and feed it to the external sound terminal ? demonstration board. to enable the on-board sta529q adc, the following actions should be taken within apworkbench as shown in the screenshots below. figure 5. enabling the adc using apworkbench
configuration AN4118 6/13 doc id 023226 rev 2 2.6 external i 2 s input the external i 2 s signal can be input to apwlink through j15 directly. for example, the external i 2 s signal can come from an external adc if the on-board adc is bypassed. j5 includes the analog signals from j9 (stereo analog input jack), plus 3.3 vdc power supply, which can be fed to the external adc. the i 2 s from the external adc can be fed into apwlink through j15, as indicated below. figure 6. i 2 s input from an external adc through j15 2.7 serial digital audio input electrical and optical inputs are supported on-board to receive serial digital audio signals. a jumper (jp2) is used to select either the electr ical or optical signal. the input signal is then converted to an i 2 s format by the on-board decoder (st part number: sta120d) and fed to the external sound terminal ? demonstration board. serial digital formats supported by the sta120d: s/pdif aes/ebu iec 958 eiaj cp-340/1201 the proper jumper setting is described in section 2.8: jumper configuration .
AN4118 configuration doc id 023226 rev 2 7/13 2.8 jumper configuration table 1. jumper configuration jumper mode serial digital input external i 2 s on-board adc (1) j2 lr clock from sta529q - on-board adc open open close j3 bit clock from sta529q - on-board adc open open close j4 i 2 s data from sta529q - on-board adc open open close j5 analog output / 3.3 vdc for external adc all open see footnote (2) all open j7 mclk to sta529q ? on-board adc open open close j12 3.3 vdc to external sound terminal ? demonstration board close close close j13 reserved, not used all open all open all open j15 i 2 s selector for external sound terminal ? demonstration board close only the relevant pins see footnote (3) all open j16 i 2 s data selector for external sound terminal ? demonstration board all close all close all close jp1 reserved, not used all open all open all open jp2 serial digital audio source selector for electrical: for optical: do not care do not care 1. apworkbench supports on-board adc function. 2. please refer to section 2.6: external i 2 s input on page 6 for detailed signal definition for each pin. 3. please refer to section 2.6: external i 2 s input on page 6 for detailed signal definition for rele vant pins. all other pins can be left open.
schematic and bill of material AN4118 8/13 doc id 023226 rev 2 3 schematic and bill of material figure 7. apwlink schematic - part 1 y#pv ((6. (('$7$ 9&& 5(6(7 567287 9287 86%'3 86%'0 *1' 6,:8$ $&%86 $&%86 $&%86 9&&,2$ $&%86 $'%86 $'%86 *1' $'%86 $'%86 $'%86 $'%86 $'%86 $'%86 *1' 6,:8% %&%86 %&%86 %&%86 %&%86 9&&,2% %'%86 %'%86 *1' %'%86 %'%86 %'%86 %'%86 %'%86 %'%86 3:5(1 9&& ;7,1 ;7287 $*1' $9&& 7(67 ((&6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 u2 ft2232d 15 16 17 18 19 20 21 &%/ 6(/ 0 0 0&. ),/7 $*1' 8 9 10 11 12 13 14 '*1' 5;3 5;1 )6<1& 6&. &6)&. 8 9(5) &h) 6'$7$ (5) 0 0 9$ 9' &( &d( &e( &f) &g) & 28 27 26 25 24 23 22 7 6 5 4 3 2 1 u3 sta120 d stby inl inr vbias avdd vhi vlo agnd vcm rst_n clkout gnd1 vdd1 mute vcc1a out1a gnd1a gnd1b out1b vcc1b vcc2b out2b gnd2b gnd2a out2a vcc2a gnd33 gndio1 vddio1 vcc33 pwrfault/eadp tm i2cdis scl sda selclk33 mclk33 xti xto filt gndpll vddpll gnd2 vdd2 sdatai sdatao lrclki lrclko gndio2 vddio2 biclki biclko 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 u4 sta030 / sta 529q *1' ' ' 9%86 1 2 3 4 j6 usb l1 bead c5 10nf + c6 33uf r3 470r d1 green c7 100nf r4 10k r1 470r r2 1m c1 100nf y1 6.000mhz c2 100nf c3 27pf c4 27pf r8 1k5 r9 27r r12 27r r10 10k c10 47pf c9 33nf c13 100nf r16 470r d2 red r14 5k1 r13 5k1 r15 0r r11 10k c8 100nf l2 bead l3 bead c12 100nf c14 100nf c16 100nf c17 100nf ns c20 100nf c21 100nf ns c19 470nf c15 100nf c18 15nf r19 82r r17 560r r20 4r7 r18 330r jp2 spdt/sm j11 '$7$ *1' 96 1 2 3 j9 *3)$95. d3 blue 1 2 3 j14 adc_in r25 4k7 r26 4k7 r29 4k7 r28 4k7 + c27 1uf + c28 1uf c30 100nf c32 10nf + c29 10uf + c31 10uf r30 470r r23 0r r31 0r + c34 10uf c33 10nf c36 100nf c37 100nf c38 1uf c35 100nf r27 0r c25 100nf r22 0r c24 100nf c26 100nf c22 220pf c23 82pf r21 12k r24 0r r35 10k c49 100nf r38 100r r39 100r c52 120pf c53 10pf + c54 10uf tp1 tp2 tp3 tp4 tp5 tp6 tp7 tp8 tp9 tp10 tp11 tp12 tp13 tp14 vcc_usb vcc_usb vcc_usb vcc_3v3 ftdi_sda ftdi_scl vcc_3v3 ftdi_sa conf_th_w ftdi_xti ftdi_tmode conf_fail ftdi_reset ftdi_stby ftdi_mute vcc_3v3 vcc_usb vcc_3v3 lrck_spdif bick_spdif vcc_3v3 xti_spdif data_spdif vcc_3v3 vcc_1v8 vcc_3v3 vcc_3v3 conf_mclki vcc_3v3 vcc_1v8 bicki_030 lrcki_030 sdatai_030 ainl ainr agnd ftdi_sda ftdi_scl_030 vcc_3v3 i2c_ctrl
AN4118 schematic and bill of material doc id 023226 rev 2 9/13 figure 8. apwlink schematic - part 2 vin vout gnd vout u5 ap1117_33 vout bypass inh gnd vin 1 2 34 5 u6 ld2985a18 + c43 33uf + c41 10uf + c46 10uf c44 100nf c45 100nf c39 1uf c40 100nf c42 100nf 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 j15 12 34 56 78 910 11 12 13 14 15 16 j10 mb_con 12 34 56 j16 12 34 56 78 910 j13 aux_con 1 2 3 4 y2 12.288mhz jp1 spdt/sm j7 j4 j2 j3 r7 0r c11 100nf j12 r5 0r c47 47pf 1 2 3 4 5 j5 r6 10k 6 ' 6 *1' 9&& ,1 1 2 34 5 6 u1 stg719 r32 100r c48 100nf r33 10k r34 10k r36 100r r37 100r c50 120pf c51 10pf r40 10r + c55 100uf vcc_usb vcc_3v3 vcc_usb vcc_1v8 conf_bicki conf_lrcki bicki_030 lrcki_030 sdatai_030 conf_sdatai1 conf_sdatai2 conf_sdatai3 conf_mclki ftdi_xti conf_sdatao conf_clkout conf_clkout conf_sdatao xti_spdif data_spdif lrck_spdif bick_spdif conf_sdatao ftdi_sa conf_clkout ftdi_tmode conf_th_w conf_sdatai1 conf_sdatai3 conf_sdatai2 conf_bicki ftdi_scl_ext ftdi_mute conf_lrcki ftdi_sda conf_fail ftdi_reset ftdi_stby vcc_3v3 conf_mclki vcc_3v3 ainr ainl agnd vcc_xt i2c_ctrl vcc_3v3 vcc_3v3 ftdi_scl ftdi_scl_030 ftdi_scl_ext vcc_3v3 vcc_xt
schematic and bill of material AN4118 10/13 doc id 023226 rev 2 table 2. bill of material item qty reference part name value footprint remarks 1 1 u1 ic stg719 sot23-6l 2 1 u2 ic ft2232d lqfp48 3 1 u3 ic sta120d so28 4 1 u4 ic sta529q vfqfpn52 5 1 u5 ic ld1117 sot223 6 1 u6 ic ld2985b18 sot23-5l 7 1 d1 led green 0603 8 1 d2 led red 0603 9 1 d3 led blue 0603 10 3 l1-3 ferrite bead 600 ohms / 100 mhz 0805 11 1 y1 crystal, 6.000 mhz 6.000 mhz xtal_hc49smt 12 1 y2 oscillator, 12.288 mhz 12.288 mhz smd, 7 mm x 5 mm 13 5 j2-4, j7, j12 header header 2 x 1 2.54 mm x 2 14 1 j5 header header 5 x 1 2.54 mm x 5 15 1 j6 usb connector type b type b 16 1 j9 optical receiver gp1f31r 17 1 j10 female connector female 8 x 2 2.54 mm x 8 x 2 bottom side 18 1 j11 rca rca connector rca 19 1 j13 header header 5 x 2 2.54 mm x 5 x 2 20 1 j14 headphone jack stereo headphone jack 21 1 j15 header header 7 x 3 2.54 mm x 7 x 3 22 1 j16 header header 3 x 2 2.54 mm x 3 x 2 23 2 jp1-2 header header 3 x 1 2.54 mm x 3 24 24 c1-2, c7-8, c11-16, c20, c24-26, c30, c35-37, c40, c42, c44-45, c48-49 cap 100 nf 0603 25 2 c17, c21 cap 100 nf ns 0603 not fitted 26 3 c5, c32-33 cap 10 nf 0603 27 2 c51, c53 cap 10 pf 0603 28 2 c50, c52 cap 120 pf 0603 29 1 c18 cap 15 nf 0603
AN4118 schematic and bill of material doc id 023226 rev 2 11/13 30 2 c38-39 cap 1 f 0603 31 1 c22 cap 220 pf 0603 32 2 c3-4 cap 27 pf 0603 33 1 c9 cap 33 nf 0603 34 1 c19 cap 470 nf 0603 35 2 c10, c47 cap 47 pf 0603 36 1 c23 cap 82 pf 0603 37 1 c55 tantalum- cap 100 f sized 38 6 c29, c31, c34, c41, c46, c54 tantalum- cap 10 f 1206 39 2 c27-28 tantalum- cap 1 f 1206 40 2 c6, c43 tantalum- cap 33 f 1206 41 8 r5, r7, r15, r22-24, r27, r31 res 0r 0603 42 5 r32, r36-39 res 100r 0603 43 1 r40 res 10r 0603 44 7 r4, r6, r10-11, r33-35 res 10k 0603 45 1 r21 res 12k 0603 46 1 r2 res 1m 0603 47 1 r8 res 1k5 0603 48 2 r9, r12 res 27r 0603 49 1 r18 res 330r 0603 50 4 r1, r3, r16, r30 res 470r 0603 51 1 r20 res 4r7 0603 52 4 r25-26, r28-29 res 4k7 0603 53 1 r17 res 560r 0603 54 2 r13-14 res 5k1 0603 55 1 r19 res 82r 0603 table 2. bill of material item qty reference part name value footprint remarks
revision history AN4118 12/13 doc id 023226 rev 2 4 revision history table 3. document revision history date revision changes 22-jun-2012 1 initial release. 16-oct-2012 2 minor textual updates; revised presentation of schematics.
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