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| ? semiconductor 1/5 msm6722 demo board ? semiconductor msm6722 demo board msm6722 demonstration board board design power on off 1 2 rst msm6722 potentiometer for speaker mic microphone jack lin in input lin out output sp speaker jack sp +C amplifier for speaker msc1157 dw up 7 6 up/dw chg bin bin thr 5 4 3 initialization ? insert the microphone into the microphone jack. ? insert the speaker into the speaker jack. switches q main power switch. w reset switch. pressing the switch initializes the lsi. e thr/chg switch. placing the switch in the thr position outputs voice incurring no interval translation. placing the switch in the chg position outputs voice incurring interval translation. r mode selection switch. placing the switch in the bin position sets up the binary mode. placing the switch in the up/dw position sets up the up/down mode. t hex switch. used in the binary mode to change intervals. yu incremental/decremental switches. in the incremental/decremental mode, the switches allow the interval to be changed. pressing the switches concurrently enables the interval step to be reset. e2d0077-27-40 this version: jan. 1998 previous version: may. 1997
? semiconductor 2/5 msm6722 demo board circuit diagram up dw hex sw 100 k w 8 0.1 m f 3a 2a 1a 4a 1b 2b 3b 4b 4y 3y 2y 1y sel hc157 0.1 m f msm6722 pd (p3) up.c (p2) dw.c (p1) prst (p0) ms thr/ chg test dao aout adin fout avdd dv dd xt xt reset dgnd sg agnd sgc min mout lin lout 0.1 m f 30 pf 30 pf 4mhz 100 k w rst + 1 m f + 10 k w + 0.47 m f mike jack 100 k w 51 pf 0.4 m f input to sg (19 pins) 10 k w 330 k w 51p 0.1 m f 0.02 m f 10 w speaker jack ain vr stby sel sp sp + 3 m f 40 k w output 0.02 m f 1 m w 40 k w 0.1 m f 5.1 k w + 220 m f power supply bin up/dw chg thr r2 d d c8 c7 c3 d c10 1 m f c9 a r6 c12 r5 c14 r6 r5 c13 c6 a a a c16 a r9 c17 r8 ic1 a c4 a r7 vr1 ra1 d c5 d bin d 1 2 4 8 1 2 a.d a.d r1 c2 c1 i0d1 d1 msc1157 c13 a ? semiconductor 3/5 msm6722 demo board pattern layout silk screen ? semiconductor 4/5 msm6722 demo board mounting side ? semiconductor 5/5 msm6722 demo board solder side |
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