CS43L21 datasheet(52/63 Pages) CIRRUS

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DS723A1

CS43L21

Limiter RELEASE Rate (RRATE[5:0])

Default: 111111

Function:

Sets the rate at which the limiter releases the digital attenuation from levels below the minimum setting in

the limiter threshold register, and returns the analog output level to the AOUTx_VOL[7:0] setting.

The limiter release rate is user selectable but is also a function of the sampling frequency, Fs, and the

DAC_SZC setting unless the disable bit is enabled.

6.16

Limiter Attack Rate Register (Address 1Bh)

Note: The DATA_SEL[1:0] bits in reg09h must be set to ‘01’b to enable function control in this register.

Limiter Attack Rate (ARATE[5:0])

Default: 000000

Function:

Sets the rate at which the limiter attenuates the analog output from levels above the maximum setting in the

limiter threshold register.

The limiter attack rate is user-selectable but is also a function of the sampling frequency, Fs, and the

DAC_SZC setting unless the disable bit is enabled.

6.17

Status (Address 20h) (Read Only)

For all bits in this register, a “1” means the associated error condition has occurred at least once since the

of the register. Reading the register resets all bits to 0.

Serial Port Clock Error (SP_CLK Error)

Default: 0

Function:

Indicates an invalid MCLK to LRCK ratio. See “Serial Port Clocking” section on page 28“Serial Port Clock-

ing” on page 28 for valid clock ratios.

Note:

On initial power up and application of clocks, this bit will be high as the serial port re-synchronizes.

Binary Code

Release Time

000000

Fastest Release

···

111111

Slowest Release

543

Reserved

ARATE5

ARATE4

ARATE3

ARATE2

ARATE1

ARATE0

Binary Code

Attack Time

000000

Fastest Attack

···

111111

Slowest Attack

543

Reserved

SP_CLKERR

SPEA_OVFL

SPEB_OVFL

PCMA_OVFL

PCMB_OVFL

Reserved

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