CS4294SLASHCS4298 datasheet(32/66 Pages) CIRRUS

32 / 66 page

CS4202

DS549PP2

4.14

Audio Sample Rate Control Registers (Index 2Ch - 32h)

SR[15:0]

Sample Rate Select. The Audio Sample Rate Control Registers (Index 2Ch - 32h) control

playback and capture sample rates. The PCM Front DAC Rate Register (Index 2Ch) controls

the Front Left and Front Right DAC sample rates. The PCM L/R ADC Rate Register

(Index 32h) controls the Left and Right ADC sample rates. There are seven sample rates di-

rectly supported by this register, shown in Table 10. Any value written to this register not con-

tained in Table 10 is not directly supported and will be decoded according to the ranges

indicated in the table. The range boundaries have been chosen so that only bits SR[15:12] of

each register will have to be considered. All register read transactions will reflect the actual

value stored (column 2 in Table 10) and not the one attempted to be written.

Default

BB80h. This value corresponds to 48 kHz sample rate.

Writes to the PCM Front DAC Rate Register (Index 2Ch) and the PCM L/R ADC Rate Register (Index 32h) are only

available in Variable Rate PCM Audio mode when the VRA bit in the Extended Audio Status/Control Register

(Index 2Ah) is ‘set’. If VRA = 0, writes to the register are ignored and the register will always read BB80h.

D15

D14

D13

D12

D11

D10

SR15

SR14

SR13

SR12

SR11

SR10

SR9

SR8

SR7

SR6

SR5

SR4

SR3

SR2

SR1

SR0

Sample Rate

(Hz)

SR[15:0], register

content (hex value)

SR[15:0], decode

range (hex value)

SR[15:12], decode

range (bin value)

8,000

1F40

0000 - 1FFF

0000 - 0001

11,025

2B11

2000 - 2FFF

0010 - 0010

16,000

3E80

3000 - 3FFF

0011 - 0011

22,050

5622

4000 - 5FFF

0100 - 0101

32,000

7D00

6000 - 7FFF

0110 - 0111

44,100

AC44

8000 - AFFF

1000 - 1010

48,000

BB80

B000 - FFFF

1011 - 1111

Table 10. Directly Supported SRC Sample Rates for the CS4202

CS4294/CS4298 数据表(PDF) 32 Page - Cirrus Logic

CS4294/CS4298 数据表(HTML) 32 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

数据表下载