CS44210

20

DS539PP1

4.8 Volume and Mixing Control (address 09h)

4.8.1 INPUT MUX SELECTION (IS)

Default = 00

00 - Selects SDIN1 as input

01 - Selects SDIN2 as input

10 - Selects SDIN3 as input

11 - Reserved

Function:

The Input Mux Selector determines which SDIN input is selected.

4.8.2 RAMP SPEED (RMP_SP)

Default = 01

00 - Ramp speed = approximately 0.1 seconds

01 - Ramp speed = approximately 0.2 seconds

10 - Ramp speed = approximately 0.3 seconds

11 - Ramp speed = approximately 0.65 seconds

Function:

This feature is used in Single Ended applications to reduce pops in the output caused by the DC-blocking

capacitor. When in control port mode, the Ramp Speed sets the time for the PWM signal to linearly ramp

up and down from the bias point (50% PWM duty cycle). Refer to Section 6.4.

4.8.3 ATAPI CHANNEL MIXING AND MUTING (ATAPI)

Default = 1001 - HP_A = L, HP_B = R (Stereo)

Function:

The CS44210 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to

Table 10 and Figure 6 for additional information.

Note: All mixing functions occur prior to the digital volume control.

76543

210

IS1

IS0

RMP_SP1

RMP_SP0

ATAPI3

ATAPI2

ATAPI1

ATAPI0

00001

001