Difference between revisions of "I2S Registers"
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| Line 27: | Line 27: | ||
|- | |- | ||
| 0-5 | | 0-5 | ||
| − | | DSP volume (doesn't affect csnd) | + | | DSP volume (doesn't affect csnd). |
|- | |- | ||
| 6-11 | | 6-11 | ||
| − | | | + | | GBA hardware master volume. And DSi too? |
|- | |- | ||
| 12 | | 12 | ||
| − | | ? | + | | Unknown purpose. Maybe direction for microphone input? |
|- | |- | ||
| − | | 13-14 | + | | 13 |
| − | | | + | | I2S frequency. 0=32.728498046875 kHz, 1=47.605088068181818181818 kHz. |
| + | |- | ||
| + | | 14 | ||
| + | | First MCLK output. 0=8.3784955 MHz, 1=16.756991 MHz. | ||
|- | |- | ||
| 15 | | 15 | ||
| Line 42: | Line 45: | ||
|} | |} | ||
| − | This I2S line is used the DSP and microphone. | + | This I2S line is used the DSP, GBA hardware and microphone. |
This is usually set to 0xC800 or 0xC820 when the DSP is active. | This is usually set to 0xC800 or 0xC820 when the DSP is active. | ||
| Line 52: | Line 55: | ||
! Description | ! Description | ||
|- | |- | ||
| − | | 13-14 | + | | 0-12 |
| − | | | + | | Unused (0). |
| + | |- | ||
| + | | 13 | ||
| + | | I2S frequency. 0=32.728498046875 kHz, 1=47.605088068181818181818 kHz. | ||
| + | |- | ||
| + | | 14 | ||
| + | | Second MCLK output. Connected to the CODEC chip. 0=8.3784955 MHz, 1=16.756991 MHz. | ||
|- | |- | ||
| 15 | | 15 | ||
Latest revision as of 21:03, 26 September 2024
Registers[edit]
| 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[edit]
| Bit | Description |
|---|---|
| 0-5 | DSP volume (doesn't affect csnd). |
| 6-11 | GBA hardware master volume. And DSi too? |
| 12 | Unknown purpose. Maybe direction for microphone input? |
| 13 | I2S frequency. 0=32.728498046875 kHz, 1=47.605088068181818181818 kHz. |
| 14 | First MCLK output. 0=8.3784955 MHz, 1=16.756991 MHz. |
| 15 | Enable (0=Disabled, 1=Enabled) |
This I2S line is used the DSP, GBA hardware and microphone.
This is usually set to 0xC800 or 0xC820 when the DSP is active.
I2S2_CNT[edit]
| Bit | Description |
|---|---|
| 0-12 | Unused (0). |
| 13 | I2S frequency. 0=32.728498046875 kHz, 1=47.605088068181818181818 kHz. |
| 14 | Second MCLK output. Connected to the CODEC chip. 0=8.3784955 MHz, 1=16.756991 MHz. |
| 15 | Enable (0=Disabled, 1=Enabled) |
This I2S line is used by CSND.
Usually set to 0xE000.