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䰘ᔩ˖
Ѡ ᭄ࣙⱘᇕ㺙ϢੑҸण䆂Ⳍ݇
1 sdवᣛҸ᭄ࣙ
sdवⱘᣛҸ㹿ᇕ㺙៤48ԡⱘ᭄ࣙˈ↣Ӵ䗕䖭48ԡⱘ᭄ࣙDŽ᭄ࣙⱘݙᆍࣙ
ᣀ䍋ྟԡǃ㒧ᴳԡǃӴ䕧ԡǃੑҸ㋶ᓩǃӴ䕧খ᭄7ԡCRC᷵偠ⷕDŽ݊ԧḐ
ᓣߚᏗབϟ
Bit ԡ㕂 47 46 [45:40] [39:08] [07:01] 00
Bit ᆑᑺ 1 1 6 32 7 1
ӧ “0” “1” x x x “1”
Ὼ༪ Start bit Transmission bit
Command
index Argument CRC7 End bit
݊ЁⱘੑҸ㋶ᓩԡᰃ[45˖40]ˈ䞠䴶ৃҹᇕ㺙⾡ੑҸˈԧⱘੑҸ㸼ᇚϟ䴶
㒭ߎDŽϡৠⱘੑҸӮᇍᑨϡৠⱘಲᑨ(respond)ˈಲᑨ᳝ϝ⾡(R1ˈR2ˈR3)Ḑᓣˈ
ੑҸ㸼Ёⱘ䗝乍Ӯ㒭ߎDŽ
2 sdवੑҸ㋶ᓩ㸼
SPI ᓣCMD ㅔ⬹䇁 ᣛҸ䇈ᯢ
㞾ব䞣 ಲᑨ
0 GO_IDLE_STATE 䖭ᰃՓcard߱ྟ
࣪ࠄIdle⢊ᗕⱘ
ᣛҸ.CSֵো䆒
Lowⱘ⢊ᗕᯊ,
ࠄᴀᣛҸৢ,card
ᇚ䕀ᤶࠄSPI
ᓣ.
None R1
1 SEND_OP_COND ࠄᴀᣛҸ
ৢ,cardᇚخR3ಲ
ᑨ(᳝OCR ᭄
).ḍOCRؐ,
ৃҹᕫⶹcard㛑
Ꮉ⬉य़㣗
ೈ.OCR᳔᭄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
ℶ᭄Ӵ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
CMD2CMD3
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,
ⳈࠄࠄᣛҸ
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
,ⳈࠄࠄᣛҸ
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
ⱘ᭄ࠄ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
ⱘ᭄ࠄ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
ONOFF. 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) R1ᓣ
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) R2ᓣ
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) R3ᓣ
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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