Secure Digital

From HwB

SD=Secure Digital

SD card

MMC with added DRM like functions.

Contents

Physical size

Width: 24 mm
Length: 32 mm
Thickness: 2.1 mm
Card Volume: 1596 mm3
Weight: ~2 g
Operating Voltage 2.7 - 3.6V

Version

Version: Name:
1.0/1.1 SD
2.0 SD-HC (HC=High capacity)

History

  • SD 1.0 (October 2001)
    • Complete Standard NDA & $$$
    • Simplified Standard released 2005
    • Based on MMC Standard
    • One device on bus
    • 4bit 25MHz bus (12.5MB/ s)
    • Alternative SPI bus interface
    • 16MB- 2GB (4GB available)
  • SD 2.0 (April 2006)
    • SDHC (4GB- 32GB)
    • Optional 8- bit bus
    • 3 speed classes(2MB/ s, 4MB/ s, 6MB/ s)

Speeds

4x: 600 KB/s
16x: 2.4 MB/s
40x: 6.0 MB/s
66x: 10 MB/s
133x: 20 MB/s

Pinout

Pin Layout

 ___________  
/ ||||||||| |
||1       8 |
|9          |


SD Mode

Pin Name Dir Description
1 CD/DAT3 Arrowlr.png PP) Card Detect/Data Line 3
2 CMD Arrowlr.png PP) Command Line
3 VSS1 Arrow.png Ground
4 Vdd Arrowl.png Voltage Supply [2.7v or 3.6v]
5 Clock Arrowl.png Clock
6 Vss2 Arrow.png Ground
7 DAT0 Arrowlr.png PP) Data Line 0
8 DAT1 Arrowlr.png PP) Data Line 1
9 DAT2 Arrowlr.png PP) Data Line 2

Note: Direction is memory card relative to host
PP) Output is Push-pull.

SPI Mode

Pin Name Dir Description
1 /CS Arrowl.png Chip Select/Slave Select (SS)
2 DI Arrowl.pngPP) Master Out/Slave In (MOSI)
3 VSS Arrow.png Supply voltage ground
4 VDD Arrowl.png Supply voltage
5 CLK Arrowl.png Clock (SCK)
6 VSS Arrow.png Supply voltage ground
7 DO Arrowlr.pngPP) Master In/Slave Out (MISO)
8 IRQ not connected or IRQ
9 NC not connected

Note: Direction is memory card relative to host
PP) Push-pull.

Related connectors

Additional information

Sources

真人斗牛下载