Secure Digital

(Difference between revisions)

Latest revision as of 03:28, 30 October 2010

SD=Secure Digital

SD card

MMC with added DRM like functions.

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

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)

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

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

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

Pin	Name	Dir	Description
1	/CS		Chip Select/Slave Select (SS)
2	DI	^PP)	Master Out/Slave In (MOSI)
3	VSS		Supply voltage ground
4	VDD		Supply voltage
5	CLK		Clock (SCK)
6	VSS		Supply voltage ground
7	DO	^PP)	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.

@@ Line 1: / Line 1: @@
 ''SD=Secure Digital''
+[[Image:Crucial_SecureDigital.png|thumb|SD card]]
 [[MMC]] with added DRM like functions.
@@ Line 26: / Line 27: @@
 | 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 ==
@@ Line 41: / Line 56: @@
 == Pinout ==
+== Pin Layout ==
+  ___________
+ / ||||||||| |
+ ||1       8 |
+ |9          |
 === SD Mode ===
 {| {{border}}
@@ Line 67: / Line 91: @@
 <sup>PP)</sup> Output is Push-pull.
-=== SPI Mode ===
+=== [[SPI]] Mode ===
 {| {{border}}
 ! Pin  !! Name !! Dir                       !! Description
@@ Line 91: / Line 115: @@
 ''Note: Direction is memory card relative to host''<br>
 <sup>PP)</sup> Push-pull.
+== Related connectors ==
+* [[SD]]
+* [[MicroSD]]
+* [[SDIO]]
 == Additional information ==
 * http://www.sdcard.org/
+== Sources ==
+* Presentation about [http://www.bsdcan.org/2007/schedule/attachments/23-freebsd-sd-warner-losh.pdf FreeBSD's SD/MMC Implementation] by Warner Losh
 [[Category:Connector]]
 [[Category:Memory]]