EMMC Registers: Difference between revisions

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These registers are used to access the system [[Flash_Filesystem|NAND]] and the inserted SD card. Both devices use the same interface.

These registers are used to access the system [[Flash_Filesystem|NAND]] and the inserted SD card. Both devices use the same interface. HCLK of the SDMMC controller is 67.027964 MHz (double of the DSi HCLK).

=Registers=

Line 17:

|-

| style="background: green" | Yes

| ?

| EMMC_PORTSEL

| 0x10006002

| 2

|

| Port selection, 0 = SD card, 1 = NAND

|-

| style="background: green" | Yes

Line 53:

|-

| style="background: green" | Yes

| EMMC_STATUS0

| [[#EMMC_STATUS0|EMMC_STATUS0]]

| 0x1000601c

| 2

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.

@@ Line 1: / Line 1: @@
-These registers are used to access the system [[Flash_Filesystem|NAND]] and the inserted SD card. Both devices use the same interface.
+These registers are used to access the system [[Flash_Filesystem|NAND]] and the inserted SD card. Both devices use the same interface. HCLK of the SDMMC controller is 67.027964 MHz (double of the DSi HCLK).
 =Registers=
@@ Line 17: / Line 17: @@
 |-
 | style="background: green" | Yes
-| ?
+| EMMC_PORTSEL
 | 0x10006002
 | 2
-|
+| Port selection, 0 = SD card, 1 = NAND
 |-
 | style="background: green" | Yes
@@ Line 53: / Line 53: @@
 |-
 | style="background: green" | Yes
-| EMMC_STATUS0
+| [[#EMMC_STATUS0|EMMC_STATUS0]]
 | 0x1000601c
 | 2
@@ 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].
 DS SDMC/NAND IO registers are located at 0x10006000 and apparently mirrored at 0x10007000. It seems the 0x10007000 mirror is never used on retail units.