I2S Registers: Difference between revisions
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= Registers = | |||
{| class="wikitable" border="1" | |||
! Old3DS | |||
! Name | |||
! Address | |||
! Width | |||
! Used by | |||
|- | |||
| style="background: green" | Yes | |||
| [[#I2S1_CNT|I2S1_CNT]] | |||
| 0x10145000 | |||
| 2 | |||
| Codec sysmodule, AgbBg, TwlBg | |||
|- | |||
| style="background: green" | Yes | |||
| [[#I2S2_CNT|I2S2_CNT]] | |||
| 0x10145002 | |||
| 2 | |||
| Codec sysmodule, AgbBg, TwlBg | |||
|} | |||
==I2S1_CNT== | |||
{| class="wikitable" border="1" | |||
! 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== | |||
{| class="wikitable" border="1" | |||
! 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. | |||
Latest revision as of 21:03, 26 September 2024
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 | 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
| 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.