NRF9160-SICA-R7 datasheet(158/400 Pages) NORDIC

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Peripherals

6.9.7.16 MODE

Address offset: 0x508

Defines the routing of the connected PDM microphones' signals

Bit number

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

B A

Reset 0x00000000

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

R/W

Field

Value ID

Value

Description

OPERATION

Mono or stereo operation

Stereo

Sample and store one pair (left + right) of 16-bit samples per RAM

word R=[31:16]; L=[15:0]

Mono

Sample and store two successive left samples (16 bits each) per RAM

word L1=[31:16]; L0=[15:0]

EDGE

Defines on which PDM_CLK edge left (or mono) is sampled

LeftFalling

Left (or mono) is sampled on falling edge of PDM_CLK

LeftRising

Left (or mono) is sampled on rising edge of PDM_CLK

6.9.7.17 GAINL

Address offset: 0x518

Left output gain adjustment

Bit number

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

A A A A A A A

Reset 0x00000028

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0

R/W

Field

Value ID

Value

Description

GAINL

Left output gain adjustment, in 0.5 dB steps, around the default

module gain (see electrical parameters)

0x00 -20 dB gain adjust

0x01 -19.5 dB gain adjust

(...)

0x27 -0.5 dB gain adjust

0x28 0 dB gain adjust

0x29 +0.5 dB gain adjust

(...)

0x4F +19.5 dB gain adjust

0x50 +20 dB gain adjust

MinGain

0x00

-20 dB gain adjustment (minimum)

DefaultGain

0x28

0 dB gain adjustment

MaxGain

0x50

+20 dB gain adjustment (maximum)

6.9.7.18 GAINR

Address offset: 0x51C

Right output gain adjustment

4418_1315 v2.0

158

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