CS44800 datasheet(63/80 Pages) CIRRUS

63 / 80 page

DS632F1

CS44800

7.19

Chnl XX Load Compensation Filter - Fine Adjust

(addresses 19h, 1Bh, 1Dh, 1Fh, 21h, 23h, 25h, 27h)

7.19.1

Channel Compensation Filter - Fine Adjust (CHXX_FINE[5:0])

Default = 000000

Function:

The Channel Load Compensation Filter Fine Adjustment settings control the amount of attenuation of this

single-pole filter which follows the Coarse Adjustment Compensation Filter. These bits are used in con-

junction with the Coarse Adjustment bits to fine tune the total frequency response of the system to com-

pensate for speaker impedance load variations. Each PWM channel is controlled by an associated

0.1 dB increments. Filter setting values less than -4.0 dB will cause the PWM output to mute.

7.20

Interrupt Mode Control (address 28h)

7.20.1

Interrupt Pin Control (INT1/INT0)

Default = 00

00 - Active high, high output indicates interrupt condition has occurred

01 - Active low, low output indicates an interrupt condition has occurred

10 - Open drain, active low. Requires an external pull-up resistor on the INT pin.

11 - Reserved

Function:

Determines how the interrupt pin (INT) will indicate an interrupt condition. If any of the mask bits in the

Interrupt Mask Register are set to a 1b, read the Interrupt Status Register to determine which condition

caused the interrupt.

CHXX_CORS[5:0]

Coarse Filter Setting

000000

0 dB

000001

-0.1 dB

001010

-1.0 dB

011001

-2.5 dB

100000

-3.2 dB

101000

-4.0 dB

Table 12. Channel Load Compensation Filter Coarse Adjust

765

RESERVED

CHXX_FINE5

CHXX_FINE4

CHXX_FINE3

CHXX_FINE2

CHXX_FINE1

CHXX_FINE0

CHXX_FINE[5:0]

Fine Filter Setting

000000

0 dB

000001

-0.1 dB

001010

-1.0 dB

011001

-2.5 dB

100000

-3.2 dB

101000

-4.0 dB

Table 13. Channel Load Compensation Filter Fine Adjust

765

INT1

INT0

RESERVED

OVFL_L/E

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