CS5366_09 datasheet(24/42 Pages) CIRRUS

24 / 42 page

DS626F4

CS5366

4.6.3

Master Mode Clock Dividers

Figure 13 shows the configuration of the MCLK dividers and the sample rate dividers for Master Mode, in-

cluding the significance of each MCLK divider pin (in Stand-Alone Mode) or bit (in Control Port Mode).

Figure 13. Master Mode Clock Dividers

4.6.4

Slave Mode Audio Clocking With Auto-Detect

In Slave Mode, CS5366 auto-detects speed mode, which eliminates the need to configure M1 and M0 when

changing among speed modes. The external MCLK is subject to clock dividers as set by the clock divider

pins in Stand-Alone Mode or the clock divider bits in Control Port Mode. The CS5366 compares the divided-

down, internal MCLK to the incoming LRCK/FS and sets the speed mode based on the MCLK/LRCK ratio

as shown in Figure 14.

Figure 14. Slave Mode Auto-Detect Speed

÷128

÷ 64

LRCK/ FS

Single

Speed

Quad

Speed

Double

Speed

÷ 2

÷ 4

÷ 1

SCLK

Single

Speed

Quad

Speed

Double

Speed

÷ 256

CLKMODE

MDIV

n/a

MCLK

÷ 1

÷ 1.5

÷ 2

÷ 1

÷ 2

÷ 1

bit

MDIV1

MDIV0

0/1

MCLK DIVIDERS

SAMPLE RATE DIVIDERS

CLKMODE

128

Single-Speed

256

CLKMODE

MDIV

n/a

External

MCLK

÷ 1

÷ 1.5

÷ 2

÷ 1

÷ 2

÷ 1

bit

MDIV1

MDIV0

0/1

MCLK DIVIDERS

CLKMODE

÷LRCK

LRCK

Double-Speed

Quad-Speed

SPEED MODE

Internal

MCLK

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