RT9107B

23

DS9107B-00 November 2016

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is a registered trademark of Richtek Technology Corporation.

ADR

Name

B

Bit

Default

Mixer and Post Gain Parameter

0x51

CH1_O_MIXER

12

CH1_O_MIXER_2

0x0080_0000

CH1_O_MIXER_1

0x0000_0000

CH1_O_MIXER_0

0x0000_0000

0x52

CH2_O_MIXER

12

CH2_O_MIXER_2

0x0080_0000

CH2_O_MIXER_1

0x0000_0000

CH2_O_MIXER_0

0x0000_0000

0x53

CH1_I_MIXER

16

CH1_I_MIXER_3

0x0080_0000

CH1_I_MIXER_2

0x0000_0000

CH1_I_MIXER_1

0x0000_0000

CH1_I_MIXER_0

0x0080_0000

0x54

CH2_I_MIXER

16

CH2_I_MIXER_3

0x0080_0000

CH2_I_MIXER_2

0x0000_0000

CH2_I_MIXER_1

0x0000_0000

CH2_I_MIXER_0

0x0080_0000

0x55

CH3_I_MIXER

12

CH3_I_MIXER_2

0x0080_0000

CH3_I_MIXER_1

0x0000_0000

CH3_I_MIXER_0

0x0000_0000

0x56

OUT_POS_SCALE

4

U[31:26], POST[25:0]

0x0080_0000

0x57

OUT_PRE_SCALE

4

U[31:26], PRE[25:0]

0x0002_0000

0x60

CH4_O_MIXER

8

CH4_O_MIXER_1

0x0000_0000

CH4_O_MIXER_0

0x0080_0000

0x61

CH4_I_MIXER

8

CH4_I_MIXER_1

0x0040_0000

CH4_I_MIXER_0

0x0040_0000

0x62

IDF_POST_SCALE

4

POST_IDF_SCALE

0x0000_0080

26-Bit 3.23 Number Format

All mixer gain and biquad coefficients are 26-bit coefficients using a 3.23 number format. The 3.23 number format means

that there are 3 bits to the left of the decimal point and 23 bits to the right of the decimal point.

Therefore, the first 3 bits are integer which including a sign bit; the last 23 bits are the decimal value which represents