CS4525 datasheet(81/91 Pages) CIRRUS

81 / 91 page

DS726A1

CS4525

9.18

Power Control (Address 5Fh)

9.18.1

Select VD Level (SelectVD)

Default = 1

Function:

This bit selects between a VD of 2.5 V or 3.3 V when the LVD pin is connected to DGND. This bit is ignored

when the LVD pin is connected to VD.

9.18.2

Power Down ADC (PDnADC)

Default = 1

Function:

The ADC will enter a power down state when this bit is enabled.

9.18.3

Power Down PWM Power Output X (PDnOutX)

Default = 1

Function:

When set, the specific PWM power output will enter a power-down state. Only the output power stage is

powered down. The PWM modulator is not affected, nor is the setup or delay register values. When set

to normal operation, the specific output will power up according to the state of the RmpSpd[1:0] bits and

the channel output configuration selected. When transitioning from normal operation to power down, the

specific output will power down according to the state of the RmpSpd[1:0] bits and the channel output con-

figuration selected.

9.18.4

Power Down (PDnAll)

Default = 1

Function:

The entire device will enter a low-power state when this function is enabled, and the contents of the control

registers are retained in this mode. The power-down bit defaults to ‘enabled’ on power-up and must be

disabled before normal operation can occur.

432

Reserved

SelectVD

PDnADC

PDnOut3/4

PDnOut2

PDnOut1

PDnAll

SelectVD Setting

Selected VD Level

0 .......................................... VD = 2.5 V.

1 .......................................... VD = 3.3 V.

PDnADC Setting

ADC Power-Down State

0 .......................................... Normal ADC operation.

1 .......................................... ADC power-down enabled.

PDnChX Setting

Power Output X Power-Down State

0 .......................................... Normal power output X operation.

1 .......................................... Power output X power-down enabled.

PDnAll Setting

Device Power-Down State

0 .......................................... Normal device operation.

1 .......................................... Device power-down enabled.

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