Difference between revisions of "EMMC Registers"
Jump to navigation
Jump to search
m (Fix sample code URL (https://github.com/devkitPro/libnds/commit/ae04ca0e0e682739bb142df3d7c213d07b1e507d)) |
|||
| Line 108: | Line 108: | ||
|} | |} | ||
| − | The IO interface for SDMC/NAND seems to be very similar to the DSi; see libnds for [https://github.com/devkitPro/libnds/blob/master/source/arm7/sdmmc.c sample code] and [https://github.com/devkitPro/libnds/blob/master/include/nds/arm7/sdmmc.h documentation], and GBATEK for [http://problemkaputt.de/gbatek.htm#dsisdmmcioportscommandparamresponsedata better documentation]. | + | The IO interface for SDMC/NAND seems to be very similar to the DSi; see libnds for [https://github.com/devkitPro/libnds/blob/master/source/arm7/sdmmc.twl.c sample code] and [https://github.com/devkitPro/libnds/blob/master/include/nds/arm7/sdmmc.h documentation], and GBATEK for [http://problemkaputt.de/gbatek.htm#dsisdmmcioportscommandparamresponsedata better documentation]. |
3DS SDMC/NAND IO registers are located at 0x10006000 and apparently mirrored at 0x10007000. It seems the 0x10007000 mirror is never used on retail units. | 3DS SDMC/NAND IO registers are located at 0x10006000 and apparently mirrored at 0x10007000. It seems the 0x10007000 mirror is never used on retail units. | ||
Revision as of 20:33, 20 January 2017
These registers are used to access the system NAND and the inserted SD card. Both devices use the same interface.
Registers
| Old3DS | Name | Address | Width | Used by |
|---|---|---|---|---|
| Yes | EMMC_CMD | 0x10006000 | 2 | Boot9, NewKernel9Loader, Process9 |
| Yes | ? | 0x10006002 | 2 | |
| Yes | EMMC_CMDARG0 | 0x10006004 | 2 | |
| Yes | EMMC_CMDARG1 | 0x10006006 | 2 | |
| Yes | EMMC_STOP | 0x10006008 | 2 | |
| Yes | EMMC_BLKCOUNT | 0x1000600a | 2 | |
| Yes | EMMC_RESP0-7 | 0x1000600c | 2*8 | |
| Yes | EMMC_STATUS0 | 0x1000601c | 2 | |
| Yes | EMMC_STATUS1 | 0x1000601e | 2 | |
| Yes | ? | 0x10006020 | 2 | |
| Yes | ? | 0x10006022 | 2 | |
| Yes | EMMC_CLKCTL | 0x10006024 | 2 | |
| Yes | EMMC_BLKLEN | 0x10006026 | 2 | |
| Yes | EMMC_OPT | 0x10006028 | 2 | |
| Yes | EMMC_FIFO | 0x10006030 | 2 | |
| Yes | EMMC_RESET | 0x100060E0 | 2 |
The IO interface for SDMC/NAND seems to be very similar to the DSi; see libnds for sample code and documentation, and GBATEK for better documentation.
3DS SDMC/NAND IO registers are located at 0x10006000 and apparently mirrored at 0x10007000. It seems the 0x10007000 mirror is never used on retail units.
EMMC_STATUS0
| Bit | Description |
|---|---|
| 3 | SD card removal flag (Set to 1 when SD card is removed) |
| 4 | SD card insertion flag (Set to 1 when SD card is inserted) |
| 5 | SD card insertion status (0 = missing, 1 = inserted) |
SD card insertion status
Assertion happens around 250 ms after SD card insertion and/or enabling the EMMC hardware (delay could possibly be due to an SD bus timeout?).