MSP3401G datasheet(38/104 Pages) MICRONAS

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MSP 34x1G

PRELIMINARY DATA SHEET

Micronas

SUBWOOFER OUTPUT CHANNEL

00 2Chex

Subwoofer Level Adjustment

bit[15:8]

0Chex

+12 dB

...

01hex

+1 dB

00hex

0 dB (default)

FFhex

−1dB

...

E3hex

−29 dB

E2hex

−30 dB

...

80hex

Mute

bit[7:0]

00hex

must be zero

If MDB is added onto the main channel, this register should be set to 00hex

SUBW_LEVEL

00 2Dhex

Subwoofer Corner Frequency

bit[15:8]

5...40

corner frequency in 10 Hz steps

(range: 50...400 Hz)

If MDB is active, SUBW_FREQ must be set to a value higher than the MDB Lowpass

Frequency (MDB_LP). Choosing the corner frequency of the subwoofer closer to

MDB_LP results in a narrower MDB frequency range. Recommended value:

1.5

×MDB_LP

Subwoofer Complementary High-Pass Filter

bit[7:0]

00hex

loudspeaker channel unfiltered

01hex

a complementary high-pass is processed in the loud-

speaker output channel

02hex

MDB added onto main channel

SUBW_FREQ

SUBW_HP

MDB CONTROL REGISTERS

00 68hex

MDB Effect Strength

bit[15:8]

00hex

MDB OFF (default)

7Fhex

maximum MDB

bit[7:0]

00hex

must be zero

The MDB effect strength can be adjusted in 1 dB steps. A value of 44hex will

yield a medium MDB effect.

MDB_STR

00 69hex

MDB Amplitude Limit

bit[15:8]

00hex

0 dBFS (default limitation)

FFhex

−1dBFS

...

E0hex

−32 dBFS

bit[7:0]

00hex

must be zero

The MDB Amplitude Limit defines the maximum allowed amplitude at the output

of the MDB relative to 0 dbFS. If the amplitude exceeds MDB_LIM, the gain of

the MDB is automatically reduced. Note that the Volume Clipping Mode must be

set to “dynamic” (see page 32).

MDB_LIM

Table 3–11: Write Registers on I2C Subaddress 12hex, continued

Address

Function

Name

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