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sd卡总结

2012-01-14 33页 pdf 2MB 34阅读

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sd卡总结 ϔὖ䗄� ���6' ᘏ㒓῵ᓣϟ� &/.�ᯊ䩳ֵো� &0'�ঠ৥ੑҸ੠ડᑨֵো� '$7����ঠ৥᭄᥂ֵো� 9''�966�⬉⑤੠ഄֵো� 6' ῵ᓣϟܕ䆌᳝ϔϾЏᴎ��໮ϾҢᴎ�े໮Ͼव���Џᴎৃҹ㒭Ңᴎߚ߿ഄഔ��Џᴎথ� ੑҸ᳝ѯੑҸᰃথ䗕㒭ᣛᅮⱘҢᴎ�᳝ѯੑҸৃҹҹᑓ᪁ᔶᓣথ䗕�� ����6' ῵ᓣϟৃҹ䗝ᢽᘏ㒓ᆑᑺ��े䗝⫼޴ḍ '$7 ֵো㒓��ৃҹ೼Џᴎ߱ྟ࣪ৢ䆒㕂�� ���6' ᘏ㒓ण䆂� 6' ῵ᓣϟⱘੑҸ੠᭄᥂⌕䛑᳝ϔϾᓔྟԡ੠㒧ᴳԡ�� !ੑҸ��ᰃ೼ &0' ϞӴ䕧ⱘ⫼ѢਃࡼϔϾ᪡԰ⱘ↨...
sd卡总结
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None R1 1 SEND_OP_COND ᥹ࠄᴀᣛҸ ৢ,cardᇚخR3ಲ ᑨ(৿᳝OCR ᭄ ᥂).ḍ᥂OCRؐ, ৃҹᕫⶹcard㛑 Ꮉ԰⬉य़㣗 ೈ.OCR᭄᥂᳔催 ؐԡⱘ1bitᰃ⫼ ᴹ⹂䅸cardݙ䚼 ໘⧚ᰃ৺㒧ᴳ (Ready/Busy䕂 䆶). None R1 2 ALL_SEND_CID ᥹ࠄᴀᣛҸৢ, ໘ѢReady⢊ᗕ ⱘcardᇚӴ䗕CID ᭄᥂.೼MMC῵ ᓣϟ,᭄᥂㹿䗕ࠄ CMDֵো,೼CID ᭄᥂ⱘ↣1bitӴ 䗕ৢ,CMDֵো ⢊ᗕᇚϢ䆹card ݙ䚼⢊ᗕⳌ↨䕗, བᵰϡϔ㟈,ᇛЁ ℶ᭄᥂Ӵ䗕,card 䖨ಲࠄReady⢊ ᗕ.བᵰⳌϔ㟈, 䆹card ᇚ䅸ЎᏆ 㹿䗝Ё,✊ৢ䕀ᤶ ࠄIdentification ⢊ᗕ. 3 SET_RELATIVE_ADDR ᴀᣛҸӮЎᏆ䕀 ᤶࠄIdentification ⢊ᗕⱘcardߚ䜡 ϔϾⳌᇍcardഄ ഔ(RCA).ᔧRCA ߚ䜡ৢ,cardᇚ䕀 ᤶࠄStand-by ⢊ ᗕ,ᇍҹৢⱘ CMD2੠CMD3 ϡಲᑨ. 4 NOP 䖭ᰃ⫼ᴹ䆒ᅮ DSR(DriveState ᆘᄬ఼)ⱘᣛҸ, Ԛᰃᴀcarϡᬃᣕ DSR. 7 SELECT/DESELECT_CARD ᴀᣛҸᰃ⫼ᴹ䗝 ᢽϔᓴcard,䅽ᅗ ೼Stand-by⢊ᗕ ੠Transfer⢊ᗕП 䯈䕀ᤶⱘᣛҸ.བ ᵰ㒭card䆒ᅮᏆ ߚ䜡ࠄⱘRCAഄ ഔ,cardᇚҢ Stand-by⢊ᗕ䕀 ᤶࠄTransfer⢊ ᗕ,ᑊᇚಲᑨҹৢ ⱘ䇏পᣛҸঞ݊ ҪᣛҸ.བᵰ㒭 card䆒ᅮRCAҹ ໪ⱘഄഔ,cardᇚ 䕀ᤶࠄStand-by ⢊ᗕDŽᔧ RCA=0000h ᯊ,cardᇚ᮴ᴵӊ ഄ䕀ᤶࠄ Stand-by⢊ᗕ. 9 SEND_CSD ᥹ࠄᴀᣛҸৢ,ᇚ Ӵ䗕CSD᭄᥂. None R1 10 SEND_CID ᥹ࠄᴀᣛҸৢ,ᇚ Ӵ䗕CID᭄᥂. None R1 11 READ_DAT_UNTIL_STOP ᥹ࠄᴀᣛҸৢ,ᇚ Ң䆒ᅮⱘഄഔӴ 䗕P2ROM᭄᥂, Ⳉࠄ᥹ࠄᣛҸ CMD12Ўℶ. 12 STOP _TRANSMISSION ᴀᣛҸᔎ㸠㒜ℶ CMD11੠ CMD18ⱘ໘⧚ None R1 13 SEND_STATUS ᥹ࠄᴀᣛҸৢ , ᇚӴ䗕⢊ᗕᆘᄬ ఼ⱘֵᙃ. None R2 15 GO_INACTIVE _STATE ᥹ࠄᴀᣛҸৢ,ᇚ 䕀 ᤶ ࠄ ӥ ℶ (inactive)⢊ᗕ. 16 SET_BLOCKLEN ᴀᣛҸ⫼ᴹ䆒ᅮ Block 䭓ᑺ.ᇍ䈵 ᰃҹৢⱘᣛҸ CMD17 ੠ CMD18. 31:00] block length R1 17 READ_SINGLE _BLOCK ᥹ࠄᴀᣛҸৢ,ᇚ Ң㞾ব䞣䆒ᅮⱘ ഄഔӴ䗕 1 Ͼ block 䭓ᑺⱘ᭄ ᥂.(block 䭓ᑺ⬅ ᣛҸ CMD16 䆒 ᅮ). [31:00] data address R1 18 READ_MULTIPLE _BLOCK ᥹ࠄᴀᣛҸৢ,ᇚ Ң㞾ব䞣䆒ᅮⱘ ഄഔ䖲㓁Ӵ䗕 block 䭓ᑺⱘ᭄ [31:00] data address R1 ᥂,Ⳉࠄ᥹ࠄᣛҸ CMD12 Ў ℶ.(block 䭓ᑺ⬅ ᣛҸ CMD16 䆒 ᅮ). 23 SET_BLOCK _COUNT ᴀᣛҸᰃ㒭㋻䎳 ⱘᣛҸ CMD18 䆒ᅮ㽕Ӵ䗕ⱘ block ᭄䞣. [31:16]set to 0 [15:00]number of block R1 24 WRITE_BLOCK ᥹ࠄᴀᣛҸৢ,ᇚ ݭ1Ͼblock 䭓ᑺ ⱘ᭄᥂ࠄ㞾ব䞣 䆒ᅮⱘഄ ഔ.(block䭓ᑺ⬅ ᣛҸCMD16䆒 ᅮ). [31:0] data address R1 25 WRITE_MULTIPLE_ BLOCK ᥹ࠄᴀᣛҸৢ,ᇚ 䖲㓁ݭblock䭓ᑺ ⱘ᭄᥂ࠄ㞾ব䞣 䆒ᅮⱘഄഔ,Ⳉࠄ ᥹ࠄᣛҸCMD12 Ўℶ.(block䭓ᑺ ⬅ᣛҸCMD16䆒 ᅮ). [31:0] data address R1 58 READ_OCR ᥹ ࠄ ᴀ ᣛ Ҹ ৢ ,Card ᇚӴ䗕 OCR᭄᥂. None R3 59 CRC_ON_OFF ᴀᣛҸᰃ⫼ᴹ䆒 ᅮ CRC 䗝乍Ў ON៪OFF.೼ SPI ῵ᓣϟ,CRCⱘ߱ ྟ ؐ 䆒 ᅮ Ў OFF.[CRC 䗝 乍 [bit=1]㸼⼎ CRC ON;[CRC 䗝 乍 [bit=0]㸼⼎ CRC OFF. [31:01] stuff bits [00:00] CRC option R1 3 ੑҸಲᑨ repond 1) R1῵ᓣ ᇍ䈵ᣛҸ CMD0 ˖ GO_IDLE_STATE CMD1 ˖ SEND_OP_COND CMD9 ˖ SEND_CSD CMD10˖SEND_CID CMD12˖STOP_TRANSMISSION CMD16˖SET_BLOCKLEN CMD17˖READ_SINGLE_BLOCK CMD18˖READ_MULTIPLE_BLOCK CMD23˖SET_BLOCK_COUNT CMD59˖CRC_ON_OFF 7 6 5 4 3 2 1 0 0 0 0 in idle state illegal command communication CRC address error parameter error 2) R2῵ᓣ ᇍ䈵ᣛҸ CMD13˖SEND_STATUS 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 out of range communication CRC error in idle state illegal command address error parameter error 3) R3῵ᓣ ᇍ䈵ᣛҸ CMD58˖READ_OCR 39 38 37 36 35 34 33 32 0 0 0 0 OCR communication CRC error in idle state illegal command address error parameter error �
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