Instruction Manual

DS632F1 63

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

76543210

RESERVED RESERVED CHXX_FINE5 CHXX_FINE4 CHXX_FINE3 CHXX_FINE2 CHXX_FINE1 CHXX_FINE0

CHXX_FINE[5:0] Fine Filter Setting