Changes

|  2

|  2

|  CLK

|  CLK

|  Clock. Frequencies 6.7MHz and 4.2MHz)

|  Clock. Frequencies 6.7MHz and 4.2MHz, 16.6MHz for SPI communication.

|-

|-

|  3

|  3

|  13

|  13

|  DAT4

|  DAT4

|  Bidirectional data bus / pin ? to savegame chip{{check}}

|  Bidirectional data bus / pin NC to savegame chip

|-

|-

|  14

|  14

|  DAT5

|  DAT5

|  Bidirectional data bus / pin ? to savegame chip{{check}}

|  Bidirectional data bus / pin WP# to savegame chip

|-

|-

|  15

|  15

===SPI flash===

===SPI flash===

So far, only one savegame FLASH chip has been identified. The chip identifies as a 0xC22211. The JEDEC manufacturer ID is Macronix, and despite the chip label saying 25L1001 it is actually an MX25L1021E. Datasheet at: http://www.macronix.com/QuickPlace/hq/PageLibrary4825740B00298A3B.nsf/h_Index/3F21BAC2E121E17848257639003A3146/$File/MX25L1021E,%203V,%201Mb,%20v0.01.pdf.

So far, only one savegame FLASH chip has been identified. The chip identifies as a 0xC22211. The JEDEC manufacturer ID is Macronix, and despite the chip label saying 25L1001, the JEDEC ID matches the MX25L1021E. Datasheet at: http://www.macronix.com/QuickPlace/hq/PageLibrary4825740B00298A3B.nsf/h_Index/3F21BAC2E121E17848257639003A3146/$File/MX25L1021E,%203V,%201Mb,%20v0.01.pdf. However, the MX25L1021E doesn't support the 4 bit wide transmission that the 3DS uses to talk to the SPI flash. It is thus likely that this is a custom flash chip.

===Protocol===

===Protocol===