Gamecards: Difference between revisions
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| 2 | | 2 | ||
| CLK | | CLK | ||
| Clock. Frequencies 6.7MHz and 4.2MHz | | Clock. Frequencies 6.7MHz and 4.2MHz, 16.6MHz for SPI communication. | ||
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| 3 | | 3 | ||
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| 13 | | 13 | ||
| DAT4 | | DAT4 | ||
| Bidirectional data bus / pin | | Bidirectional data bus / pin NC to savegame chip | ||
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| 14 | | 14 | ||
| DAT5 | | DAT5 | ||
| Bidirectional data bus / pin | | Bidirectional data bus / pin WP# to savegame chip | ||
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| 15 | | 15 | ||
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===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 | 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=== | ||