CS42325 datasheet(22/71 Pages) CIRRUS

22 / 71 page

DS838A2

CS42325

SWITCHING CHARACTERISTICS - SERIAL AUDIO

Logic ‘0’ = GND = GNDH = 0 V; Logic ‘1’ = VL; CL = 20 pF.

Notes: 18. Duty cycle of generated SCLKx in Master Mode depends on duty cycle of the corresponding MCLKx as

specified under “System Clocking” on page 28.

19. In Slave Mode, the SCLK/LRCK ratio can be set according to preference. However, specified perfor-

mance is guaranteed only when using the ratios in Section 4.2.1 Master Mode on page 30 and Section

4.2.2 Slave Mode on page 30.

Parameter

Symbol

Min

Typ

Max

Unit

Master Clock (MCLKx = MCLK1, MCLK2)

MCLKx Frequency

MCLKx Duty Cycle

1.024

41.4720

MHz

Sample Rates

Single-Speed Mode

Double-Speed Mode

108

kHz

Master Mode

SCLKx Frequency

SCLKx Period

1/(128*108 kHz)

SCLKx Duty Cycle (Note 18)

tPERIOD

tHIGH ÷ tPERIOD

64•Fs

72.3

64•Fs

LRCKx setup

before SCLK rising

LRCKx hold

after SCLK rising

tSETUP1

tHOLD1

SDOUT setup

before SCLK rising

SDOUT hold

after SCLK rising

tSETUP2

tHOLD2

Slave Mode

SCLKx Frequency (Note 19)

SCLKx Period

1/(128•108 kHz)

SCLKx Duty Cycle

tPERIOD

tHIGH ÷ tPERIOD

72.3

64•Fs

LRCKx setup

before SCLK rising

LRCKx hold

after SCLK rising

tSETUP1

tHOLD1

SDOUT setup

before SCLK rising

SDOUT hold

after SCLK rising

tSETUP2

tHOLD2

Figure 3. Serial Input Timing

LRCKx

SDOUT

SCLKx

data

channel

data

tHOLD2

tSETUP2

tHOLD1

tSETUP1

tPERIOD

tHIGH

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