©Copyright 2000-2007 SD Card Association
SDIO Specification Version 2.00
iv Confidential
5.3.2 Special Timing for CMD53 Multi-Block Read.............................................................................. 29
6. SDIO Card Internal Operation................................................................................................................ 30
6.1 Overview ........................................................................................................................................... 30
6.2 Register Access Time........................................................................................................................ 30
6.3 Interrupts ........................................................................................................................................... 30
6.4 Suspend/Resume.............................................................................................................................. 31
6.5 Read Wait.......................................................................................................................................... 31
6.6 CMD52 During Data Transfer............................................................................................................ 31
6.7 SDIO Fixed Internal Map................................................................................................................... 31
6.8 Common I/O Area (CIA) .................................................................................................................... 32
6.9 Card Common Control Registers (CCCR)......................................................................................... 32
6.10 Function Basic Registers (FBR) ........................................................................................................ 39
6.11 Card Information Structure (CIS)....................................................................................................... 41
6.12 Multiple Function SDIO Cards........................................................................................................... 41
6.13 Setting Block Size with CMD53......................................................................................................... 41
6.14 Bus State Diagram ............................................................................................................................ 42
7. Embedded I/O Code Storage Area (CSA) ............................................................................................. 43
7.1 CSA Licensing Notice........................................................................................................................ 43
7.2 CSA Access....................................................................................................................................... 43
7.3 CSA Data Format .............................................................................................................................. 43
8. SDIO Interrupts....................................................................................................................................... 44
8.1 Interrupt Timing ................................................................................................................................. 44
8.1.1 SPI and SD 1-bit Mode Interrupts .............................................................................................. 44
8.1.2 SD 4-bit Mode ............................................................................................................................ 44
8.1.3 Interrupt Period Definition .......................................................................................................... 44
8.1.4 Interrupt Period at the Data Block Gap in 4-bit SD Mode (Optional) .......................................... 46
8.1.5 Inhibited Interrupts (Removed Section)...................................................................................... 48
8.1.6 End of Interrupt Cycles............................................................................................................... 48
8.1.7 Terminated Data Transfer Interrupt Cycle .................................................................................. 49
8.1.8 Interrupt Clear Timing................................................................................................................. 50
9. SDIO Suspend/Resume Operation........................................................................................................ 51
10. SDIO Read Wait Operation.......................................................................................................
.............. 55
11. Power Control......................................................................................................................................... 57
11.1 Power Control Overview.................................................................................................................... 57
11.2 Power Control support for SDIO Cards ............................................................................................. 57
11.2.1 Master Power Control ................................................................................................................ 57
11.2.2 Power Selection ......................................................................................................................... 58
11.2.3 High-Power Tuples..................................................................................................................... 58
11.3 Power Control Support for the SDIO Host.........................................................................................58
11.3.1 Version 1.10 Host....................................................................................................................... 58
11.3.2 Power Control Operation............................................................................................................ 59
12. High-Speed Mode ................................................................................................................................... 60
12.1 SDIO High-Speed Mode.................................................................................................................... 60
12.2 Switching Bus Speed Mode in a Combo Card................................................................................... 60
13. SDIO Physical Properties ...................................................................................................................... 62
13.1 SDIO Form Factors ........................................................................................................................... 62
13.2 Full-Size SDIO .................................................................................................................................. 62
13.2.1 Full-Size SDIO Mechanical Extensions...................................................................................... 62
13.2.2 Additional ESD/EMI Ground Point.............................................................................................. 63
13.2.3 Full-Size SDIO Extended Case.................................................................................................. 63
13.2.4 Write Protect Switch................................................................................................................... 63
13.3 miniSDIO........................................................................................................................................... 65
13.3.1 miniSDIO Mechanical Extensions .............................................................................................. 65
13.3.2 Additional ESD/EMI Ground Point.............................................................................................. 65
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