Dolby Laboratories STAV-3770 General Information, Parts, 7.1.1 IC, CXD2724Q VOLUME DSP ASSY IC201

VSX-D307

7. GENERAL INFORMATION

7.1 PARTS

7.1.1 IC

• The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.

CXD2724Q (VOLUME DSP ASSY : IC201)

• DSP IC

∙Block Diagram

	24k bit DELAY RAM					27	LIN
				ADC1		26	LO1
RVDT 50
	MICRO					38	RIN
SCK 46
	COMPUTER			ADC2			LO2
XLAT 49						39
	I/F				Analog SW
READY 47
			DSP
LRCK 58				DAC1		23	LOUT
	SERIAL
BCK 57
	DATA						ROUT
SI 55				DAC2		42
	I/F
XMST 60					Analog SW
	CLOCK GENERATOR			DAC3	Trim Vol	30	XCOUT
		/TIMING CIRCUIT
				DAC4	Trim Vol	35	XSOUT
	33	32	17

XTLI XTLO BFOT

∙Pin Function

No.	Pin Name	I/O		Function
1-3	T.P	O	Monitor pin for test		Normally, outputs "L".
4	VSS0	–	Digital ground
5-8	T.P	O	Monitor pin for test		Normally, outputs "L".
9	TST0	I	Test pin	Normally, fix to L.
10	VDD0	–	Digital power supply
11	VSS1	–	Digital ground
12	TST1	I	Test pin	Normally, fix to "L".
13	TST2	I	Test pin	Normally, fix to "L".
14	TST3	I	Test pin	Normally, fix to "L".
15	TST4	I	Test pin	Normally, fix to "L".
16	XRST	I	System reset input		L : reset.
17	BFOT	O	Clock and divided frequency output (384/768/256/512 fs)
18	CSL1	I	Test pin	Normally, fix to "H".
19	CSL2	I	Test pin	Normally, fix to "L".
20	VSS2	–	Digital ground
21	AVS3	–	Ground for L-ch D/A converter
22	AVD3	–	Power supply for L-ch D/A converter
23	LOUT	O	L-ch A/D converter output
24	AVD1	–	Power supply for L-ch A/D converter
25	AVS1	–	Ground for L-ch A/D converter
26	LO1	O	OP amp. inverting output for LPF of L-ch A/D converter
27	LIN	I	Analog input of L-ch A/D converter
28	AVD5	–	Power supply for C-ch D/A converter
29	AVS5	–	Ground for C-ch D/A converter
30	XCOUT	O	C-ch D/A converter output
31	AVDX	–	Analog power supply for master clock
32	XTLO	O	Crystal oscillation circuit output

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