CS47L35 datasheet(222/300 Pages) CIRRUS

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222

DS1085F3

CS47L35

4.19 Charge Pumps, Regulators, and Voltage Reference

Table 4-113 lists the LDO2 voltage control settings.

R537 (0x0219)

Mic_Bias_Ctrl_2

15 MICB2_EXT_CAP

Microphone Bias 2 External Capacitor (when MICB2_BYPASS = 0). Configures the

MICBIAS2 regulator according to the specified capacitance connected to the

MICBIAS2x outputs.

0 = No external capacitor

1 = External capacitor connected

8:5 MICB2_LVL[3:0]

0x7

Microphone Bias 2 Voltage Control (when MICB2_BYPASS = 0)

0x0 = 1.5 V

0x1 = 1.6 V

… (0.1-V steps)

0xC = 2.7 V

0xD to 0xF = 2.8 V

MICB2_RATE

Microphone Bias 2 Rate (Bypass Mode)

0 = Fast start-up/shutdown

1 = Pop-free start-up/shutdown

MICB2_DISCH

Microphone Bias 2 Discharge

0 = MICBIAS2 floating when disabled

1 = MICBIAS2 discharged when disabled

MICB2_BYPASS

Microphone Bias 2 Mode

0 = Regulator Mode

1 = Bypass Mode

MICB2_ENA

Microphone Bias 2 Enable

0 = Disabled

1 = Enabled

R540 (0x021C)

Mic_Bias_Ctrl_5

MICB1B_DISCH

Microphone Bias 1B Discharge

0 = MICBIAS1B floating when disabled

1 = MICBIAS1B discharged when disabled

MICB1B_ENA

Microphone Bias 1B Enable

0 = Disabled

1 = Enabled

MICB1A_DISCH

Microphone Bias 1A Discharge

0 = MICBIAS1A floating when disabled

1 = MICBIAS1A discharged when disabled

MICB1A_ENA

Microphone Bias 1A Enable

0 = Disabled

1 = Enabled

R542 (0x021E)

Mic_Bias_Ctrl_6

MICB2B_DISCH

Microphone Bias 2B Discharge

0 = MICBIAS2B floating when disabled

1 = MICBIAS2B discharged when disabled

MICB2B_ENA

Microphone Bias 2B Enable

0 = Disabled

1 = Enabled

MICB2A_DISCH

Microphone Bias 2A Discharge

0 = MICBIAS2A floating when disabled

1 = MICBIAS2A discharged when disabled

MICB2A_ENA

Microphone Bias 2A Enable

0 = Disabled

1 = Enabled

1.See Table 4-113 for LDO2 output voltage definition.

Table 4-113. LDO2 Voltage Control

LDO2_VSEL[5:0]

LDO Output

LDO2_VSEL[5:0]

LDO Output

LDO2_VSEL[5:0]

LDO Output

0x00

0.900 V

0x10

1.300 V

0x20

2.600 V

0x01

0.925 V

0x11

1.325 V

0x21

2.700 V

0x02

0.950 V

0x12

1.350 V

0x22

2.800 V

0x03

0.975 V

0x13

1.375 V

0x23

2.900 V

0x04

1.000 V

0x14

1.400 V

0x24

3.000 V

0x05

1.025 V

0x0E

1.250 V

0x1C

2.200 V

Table 4-112. Charge-Pump and LDO Control Registers (Cont.)

Label

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