CS5345 datasheet(31/41 Pages) CIRRUS

31 / 41 page

DS658F2

CS5345

6. REGISTER DESCRIPTION

6.1

Chip ID - Register 01h

Function:

This register is Read-Only. Bits 7 through 4 are the part number ID, which is 1110b (0Eh), and the remaining

bits (3 through 0) indicate the device revision as shown in Table 4 below.

6.2

Power Control - Address 02h

6.2.1

Freeze (Bit 7)

Function:

This function allows modifications to be made to certain control port bits without the changes taking effect

until the Freeze bit is disabled. To make multiple changes to these bits take effect simultaneously, set the

Freeze bit, make all changes, then clear the Freeze bit. The bits affected by the Freeze function are listed

in Table 5.

6.2.2

Power-Down MIC (Bit 3)

Function:

The microphone preamplifier block will enter a low-power state whenever this bit is set.

6.2.3

Power-Down ADC (Bit 2)

Function:

The ADC pair will remain in a reset state whenever this bit is set.

6.2.4

Power-Down Device (Bit 0)

Function:

The device will enter a low-power state whenever this bit is set. The power-down bit is set by default and

must be cleared before normal operation can occur. The contents of the control registers are retained

when the device is in power-down.

432

PART3

PART2

PART1

PART0

REV3

REV2

REV1

REV0

REV[2:0]

Revision

001

010

B, C0

011

Table 4. Device Revision

432

Freeze

Reserved

PDN_MIC

PDN_ADC

Reserved

PDN

Name

Bit(s)

Mute

04h

Gain[5:0]

07h

5:0

Gain[5:0]

08h

5:0

Table 5. Freeze-able Bits

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