Ic104 Digital Signal Processor For Karaoke (Cxd2721Q)/Main Board - Sony MCE-K700 Service Manual

• IC104 DIGITAL SIGNAL PROCESSOR FOR KARAOKE (CXD2721Q)/MAIN board

Pin No. Pin Name
1 XLT
2-3 N.C
4 RVDT
5 N.C
6 AVD0
7 ADS0
8 XRST
9 X768
10 VSS
11 VDD1
12 VSS1
13 XWO
14 BFOT
15 BSL2
16 BSL1
17 VSS2
18 VSS1
19 AVS3
20 AIN3
21 LO3
22 AVD3
23 AVD2
24 AIN2
25 LO2
26 AVS2
27-28 N.C
29 AOUT2
30 AVS5
31 N.C
32 AVD5
33 AO2N
34 AO2P
35 VDD7
36 XTLO
37 XTLI
38 VSS9
39 AOIN
40 AO1P
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I/O
I Latch input from system controller (CXP82532-010Q)
– Normally open
I Data input from system controller (CXP82532-010Q)
– Normally open
– Digital power supply pin for DRAM
– Digital ground pin for DRAM
I System reset input ("L" reset)
I Test input. Normally fixed at "L".
– Digital block ground
– Digital block power supply
– Digital block ground
I Window open input for synchronism. Normally "H" (Connected to +5V)
O Clock dividing output (384/768/256/512fs)
I Frequency diving rate setting of BFOT
I Frequency diving rate setting of BFOT
– Digital block ground
– Digital block power supply
– Ground for CH-3 • AD converter
I
Analog input for CH-3 • AD converter (for MIC input)
I Analog input for CH-3 • AD converter. OP amplifier inverter output for LPF (for MIC input)
– Power supply for CH-3 • AD converter
– Power supply for CH-2 • AD converter
I Analog input for CH-2 • AD converter
I Analog input for CH-2 • AD converter. OP amplifier inverter output for LPF
– Ground for CH-2 • AD converter
–
Normally open
O CH-2 • DA converter • LPF output (Not used open)
– Ground for CH-2 • DA converter
– Normally open
– Power supply for CH-2 • DA converter
O CH-2 • DA converter analog negative phase output
O CH-2 • DA converter analog positive phase output
– Digital power supply for master clock
O Crystal oscillator output
I Crystal oscillator input
– Digital ground for master clock
O CH-1 • DA converter analog negative phase output
O CH-1 • DA converter analog positive phase output
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Function