1 ADJ/GND 0
2 Output 1.84
3 Input 3.40
Wireless Audio Link IC BH1415F (U7)
Pin No. Type Function Description Voltage(V)
1 In R-ch audio source input terminal 2.33
2 In Pre-emphasis time constant terminal 2.54
3 In LPF time constant terminal 2.56
4 In Filter terminal 2.85
5 Out Composite signal output terminal 2.56
6 Gnd GND 0
7 Out Pll phase detector output terminal 1.20
8 PI Power supply terminal 5.03
9 In RF oscillator terminal 2.99
10 Gnd RF GND 0
11 Out RF transmission output terminal 3.25
12 PI PLL power supply terminal 5.03
13 Out X’tal oscillator terminal 2.63
14 In X’tal oscillator terminal 2.21
15 In Chip enable terminal 0.08
16 In Clock input terminal 0.04
17 In Audio mute terminal 0.04
18 In Audio mute terminal 0.08
19 In Pilot signal adjust terminal 2.54
20 In LPF time constant terminal 2.56
21 In Pre-emphasis time constant terminal 2.54
22 In L-ch audio source input terminal 2.54
Audio DAC CS4340 (U8)
Pin No. Name Type Function Voltage(V)
1 /RST In Reset 3.14
2 SDATA In/Out Serial Data 0.05
3 SCLK/D
EM1
In Serial Clock/De-emphasis 1.67
4 LRCK In Left/Right Clock 1.69
5 MCLK In Master Clock 1.66
6 DIF1 In Digital Interface Format 0.04
7 DIF0 In Ditital Interface Format 5.02
8 DEM0 In De-emphasis 0.04
9 FILT+ In Positive Voltage Reference 4.86
10 VQ In Quiescent Voltage 2.02
11 REF_G
ND
Gnd Reference Ground 0
12 AOUTR Out Right Analog Output 2.21
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