I2S Registers

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Registers

Old3DS Name Address Width Used by
Yes I2S1_CNT 0x10145000 2 Codec sysmodule, AgbBg, TwlBg
Yes I2S2_CNT 0x10145002 2 Codec sysmodule, AgbBg, TwlBg


I2S1_CNT

Bit Description
0-5 DSP volume (doesn't affect csnd)
6-11 Another volume?
12 ?
13-14 ?
15 Enable (0=Disabled, 1=Enabled)

This I2S line is used the DSP and microphone.

This is usually set to 0xC800 or 0xC820 when the DSP is active.


I2S2_CNT

Bit Description
13-14 ?
15 Enable (0=Disabled, 1=Enabled)

This I2S line is used by CSND.

Usually set to 0xE000.