CS47L35 datasheet(192/300 Pages) CIRRUS

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192

DS1085F3

CS47L35

4.16 Clocking and Sample Rates

R257 (0x0101)

System_Clock_1

SYSCLK_FRAC

SYSCLK Frequency

0 = SYSCLK is a multiple of 6.144MHz

1 = SYSCLK is a multiple of 5.6448MHz

10:8 SYSCLK_

FREQ[2:0]

100

SYSCLK Frequency

000 = 6.144 MHz (5.6448 MHz)

001 = 12.288 MHz (11.2896 MHz)

010 = 24.576 MHz (22.5792 MHz)

011 = 49.152 MHz (45.1584 MHz)

100 = 98.304 MHz (90.3168 MHz)

All other codes are reserved

The frequencies in brackets apply for 44.1 kHz–related sample rates only (i.e.,

SAMPLE_RATE_n = 01XXX).

SYSCLK_ENA

SYSCLK Control

0 = Disabled

1 = Enabled

SYSCLK should only be enabled after the applicable clock source has been

configured and enabled. Set this bit to 0 when reconfiguring the clock sources.

All digital core (audio mixer) x_SRC fields must be cleared before clearing

SYSCLK_ENA = 0.

3:0

SYSCLK_

SRC[3:0]

0100

SYSCLK Source

0000 = MCLK1

0001 = MCLK2

0100 = FLL1

1000 = AIF1BCLK

1001 = AIF2BCLK

1010 = AIF3BCLK

All other codes are reserved

R258 (0x0102)

Sample_rate_1

4:0

SAMPLE_RATE_

1[4:0]

0x11

Sample Rate 1 Select

0x00 = None

0x01 = 12 kHz

0x02 = 24 kHz

0x03 = 48 kHz

0x04 = 96 kHz

0x05 = 192 kHz

0x09 = 11.025 kHz

0x0A = 22.05 kHz

0x0B = 44.1 kHz

0x0C = 88.2 kHz

0x0D = 176.4 kHz

0x11 = 8 kHz

0x12 = 16 kHz

0x13 = 32 kHz

All other codes are reserved

R259 (0x0103)

Sample_rate_2

4:0

SAMPLE_RATE_

2[4:0]

0x11

Sample Rate 2 Select

Field coding is same as SAMPLE_RATE_1.

R260 (0x0104)

Sample_rate_3

4:0

SAMPLE_RATE_

3[4:0]

0x11

Sample Rate 3 Select

Field coding is same as SAMPLE_RATE_1.

R266 (0x010A)

Sample_rate_1_

status

4:0

SAMPLE_RATE_

1_STS[4:0]

0x00

Sample Rate 1 Status

(Read only)

Field coding is same as SAMPLE_RATE_1.

R267 (0x010B)

Sample_rate_2_

status

4:0

SAMPLE_RATE_

2_STS[4:0]

0x00

Sample Rate 2 Status

(Read only)

Field coding is same as SAMPLE_RATE_1.

R268 (0x010C)

Sample_rate_3_

status

4:0

SAMPLE_RATE_

3_STS[4:0]

0x00

Sample Rate 3 Status

(Read only)

Field coding is same as SAMPLE_RATE_1.

Table 4-93. Clocking Control (Cont.)

Bit

Label

Default

Description

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