cxd2720q-2 datasheet(31/47 Pages) SONY

Part #	CXD2720Q-2

Description	Single-Chip Dolby Pro Logic Surround Decoder

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Manufacturer	SONY [Sony Corporation]

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CXD2720Q-2

(4) Examples of Key Controller Setting

Examples of pitch ratio setting are illustrated below.

nRpR setting values are hexadecimal notation with D15 as MSB and D2 as LSB for a total of 14 bits.

(D1 and D0 can be optional data.)

CENT

0

+50

+100

+150

+200

+250

+300

+350

+400

+450

+500

+550

+600

+650

+700

+750

+800

+850

+900

+950

+1000

+1050

+1100

+1150

+1200

0000H

01E0H

03CEH

05CAH

07D6H

09F1H

0C1BH

0E56H

10A2H

12FFH

156EH

17EEH

1A82H

1D29H

1FE4H

22B3H

2597H

2892H

2BA2H

2EC9H

3208H

3560H

38D0H

3C5BH

4000H

0

–50

–100

–150

–200

–250

–300

–350

–400

–450

–500

–550

–600

–650

–700

–750

–800

–850

–900

–950

–1000

–1050

–1100

–1150

–1200

0000H

FE2EH

FC69H

FAB1H

F905H

F765H

F5D2H

F44AH

F2CCH

F15AH

EFF3H

EE95H

ED42H

EBF8H

EAB8H

E980H

E852H

E72CH

E60EH

E4F9H

E3ECH

E2E6H

E1E8H

E0F1H

E000H

nPpR, nRpR_R

CENT

nPpR, nRpR_R

Table 10-1. Pitch Ratio Setting Examples

The numeric representation format for pitch ratio here is:

15

nRpR =

∑Dn × 2n–14

n = 2

The numeric representation range is: –2.0

≤ nRpR ≤ 2.0 – 2–12

Also, the relationship formula with music word cent value C is:

nRpR = 2

– 1, C = 1200 log2 [nRpR + 1] [cent]

The semitone at average ratio is 100 [cent].

1200

C

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CXD2720Q-2 Datasheet(PDF) 31 Page - Sony Corporation

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