CS47L85 datasheet(231/370 Pages) CIRRUS

231 / 370 page

CS47L85

Rev 4.3

231

HPOUT1FB1/

MICDET2

MICDET1/

HPOUT1FB2

MICBIASn

* IN1BP, IN2BLP, IN2BR

R1+R2 = 2.2k

 (+/-2%)

GPSWA

GPSWB

* Note: The Jack plug is shown partially

removed, with the MICDET1 pin in

contact with the headphone load.

* see note

General Purpose

Switch Control

SW1_MODE

CS47L85

MICDET

Clamp Control

MICD_CLAMP_OVD

MICD_CLAMP_MODE

MICD_CLAMP_STS

MICD_CLAMP_DB

When the MICDET Clamp is active in the configuration shown, the

MICDET1 pin is grounded via the headphone jack ground connection.

* Note that the IN1B or IN2B analogue

mic channel is recommended with the

external accessory detect function

Figure 69 General Purpose Switch circuit

The control registers associated with the MICDET Clamp and General Purpose Switch functions are described in Table 86.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R65 (0041h)

Sequence_c

ontrol

WSEQ_ENA_MIC

D_CLAMP_FALL

MICDET Clamp (Falling) Write

Sequencer Select

0 = Disabled

1 = Enabled

WSEQ_ENA_MIC

D_CLAMP_RISE

MICDET Clamp (Rising) Write

Sequencer Select

0 = Disabled

1 = Enabled

R710

(02C6h)

Micd_Clamp

_control

MICD_CLAMP_O

MICDET Clamp Override

0 = Disabled

1 = Enabled (Clamp active)

3:0

MICD_CLAMP_M

ODE [3:0]

0000

MICDET Clamp Mode

0h = Disabled

1h = Active (MICDET1 and MICDET2

are shorted together)

2h = Reserved

3h = Reserved

4h = Active when JD1=0

5h = Active when JD1=1

6h = Active when JD2=0

7h = Active when JD2=1

8h = Active when JD1=0 or JD2=0

9h = Active when JD1=0 or JD2=1

Ah = Active when JD1=1 or JD2=0

Bh = Active when JD1=1 or JD2=1

Ch = Active when JD1=0 and JD2=0

Dh = Active when JD1=0 and JD2=1

Eh = Active when JD1=1 and JD2=0

Fh = Active when JD1=1 and JD2=1

CS47L85 Datasheet(PDF) 231 Page - Cirrus Logic

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