ALC5642R-VF-CG datasheet(29/156 Pages) REALTEK | Multi-Channel Audio Hub/CODEC

部件名	ALC5642R-VF-CG

功能描述	Multi-Channel Audio Hub/CODEC

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制造商	REALTEK [Realtek Semiconductor Corp.]

网页	https://www.realtek.com/en/

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ALC5642-VF

Datasheet

Multi-Channel Audio Hub/CODEC with embedded Voice

DSP and SounzReal

TM Digital Sound Effect

17

Rev. 0.93

7.4.1.

Phase-Locked Loop

A Phase-Locked Loop (PLL) is used to provide a flexible input clock from 2.048MHz to 40MHz. The

source of the PLL can be set to MCLK, BCLK1 or BCLK2 by setting register.

The S/W driver can set up the PLL to output a frequency to match the requirement of system clock.

The PLL transmit formula as below:

FOUT = (MCLK * (N+2)) / ((M+2) * (K+2)) {Typical K=2}

Table 10.

Clock Setting Table for 48K (Unit: MHz)

MCLK

N

M

FVCO

K

FOUT

13

66

7

98.222

2

24.555

3.6864

78

1

98.304

2

24.576

2.048

94

0

98.304

2

24.576

4.096

70

1

98.304

2

24.576

12

80

8

98.4

2

24.6

15.36

81

11

98.068

2

24.517

16

78

11

98.462

2

24.615

19.2

80

14

98.4

2

24.6

19.68

78

14

98.4

2

24.6

24

39

8

98.4

2

24.6

Table 11.

Clock Setting Table for 44.1K (Unit: MHz)

MCLK

N

M

FVCO

K

FOUT

13

68

8

91

2

22.75

3.6864

72

1

90.931

2

22.733

2.048

86

0

90.112

2

22.528

4.096

64

1

90.112

2

22.528

12

66

7

90.667

2

22.667

15.36

63

9

90.764

2

22.691

16

66

10

90.667

2

22.667

19.2

64

12

90.514

2

22.629

19.68

67

13

90.528

2

22.632

24

62

15

90.352

2

22.588

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