SanDisk SDMB-16, Руководство по эксплуатации продукта

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MultiMediaCard Product Manual
SanDisk MultiMediaCard Product Manual Rev. 2 © 2000 SANDISK CORPORATION 4
Table of Contents
(continued)
4.1.2 Pin Assignments in SPI Mode............................................................................... 19
4.2 MultiMediaCard Bus Topology....................................................................................... 19
4.2.1
Power Protection ................................................................................................ 20
4.2.2 Programmable Card Output Driver..................................................................... 20
4.3 SPI Bus Topology............................................................................................................ 21
4.3.1
Power Protection ................................................................................................ 22
4.4 Electrical Interface ........................................................................................................ 22
4.4.1
Power-up ........................................................................................................... 22
4.4.2 Bus Operating Conditions................................................................................... 23
4.4.3 Bus Signal Levels............................................................................................... 24
4.4.4 Open-Drain Mode Bus Signal Level .................................................................... 25
4.4.5 Push-Pull Mode Bus Signal Level........................................................................ 25
4.4.6 Bus Timing......................................................................................................... 25
4.5 MultiMediaCard Registers............................................................................................. 26
4.5.1
Operating Conditions Register (OCR)................................................................. 26
4.5.2 DSR Register ..................................................................................................... 27
4.5.3 Card Identification (CID) Register..................................................................... 28
4.5.4 CSD Register ..................................................................................................... 28
4.5.5 Status Register................................................................................................... 35
4.5.6 RCA Register..................................................................................................... 37
4.5.7 MultiMediaCard Registers in SPI Mode.............................................................. 37
5.0 MultiMediaCard Protocol Description...................................................................................38
5.1 General.......................................................................................................................... 38
5.2 Card Identification Mode............................................................................................... 39
5.2.1
Reset ................................................................................................................. 39
5.2.2 Operating Voltage Range Validation................................................................. 40
5.2.3 Card Identifcation Process.................................................................................. 40
5.3 Data Transfer Mode ....................................................................................................... 41
5.3.1
Data Read Format ............................................................................................. 42
5.3.2 Data Write Format............................................................................................ 43
5.4 Clock Control................................................................................................................. 45
5.5 Cyclic Redundancy Codes (CRC)..................................................................................... 45
5.6 Error Conditions............................................................................................................. 47
5.6.1
CRC and Illegal Command ................................................................................. 47
5.6.2 Read, Write and Erase Time-out Conditions........................................................ 47
5.7 Commands ..................................................................................................................... 47
5.7.1
Command Types................................................................................................. 47
5.7.2 Command Format............................................................................................... 48
5.7.3 Command Classes............................................................................................... 48
5.7.4 Detailed Command Description.......................................................................... 49
5.8 Card State Transition Table ........................................................................................... 53
5.9 Responses....................................................................................................................... 54
5.10 Timings.......................................................................................................................... 56
5.10.1 Command and Response...................................................................................... 56
5.10.2 Data Read......................................................................................................... 57
5.10.3 Data Write........................................................................................................ 58
5.10.4 Timing Values.................................................................................................... 60