Secure Digital Card Secure Digital Card Rev. A.
Secure Digital Card Table of Contents 1. Introduction to the SD Card ..................................................................................................... 1 2. SD Card Feature ........................................................................................................................ 1 3. Product Specification ............................................................................................................... 2 4. SD Card Interface Description .........................
Secure Digital Card Revision History Revision A.0 Date 01/04 ‘07 History Remark New Creation “PQI reserves the right to make changes without notification when fit, form, function, quality and reliability are not affected. The data sheets do not constitute contract documents and should not be considered part of the specification for purposes of any warranty.“ Rev. A.
Secure Digital Card 1. Introduction to the SD Card The SD Card is a memory card that is small and thin with SDMI. SD Card is a Flash–Based memory card that is designed to meet the security, capacity, performance and environment requirements inherent to use in emerging audio and video electronic device. The SD Card includes a copyright protection mechanism that complies with the security of the SDMI standard (SDMI: Secure Digital Music Initiative).
Secure Digital Card 3. Product Specification 3.1 System Environment Specifications Temperature Moisture and corrosion Vibration Shock Altitude (relative to sea level) Operating: Non-Operating: Operating: Non-Operating: -25℃ to 85℃ -40℃ (168h) to 85℃(500h) 25°C / 95% rel. humidity 40°C / 93% rel. hum./500h salt water spray: 3% NaCl/35C; 24h acc. MIL STD Method 1009 15 G peak to peak max. 15 G peak to peak max. 1,000 G max. 1,000 G max. 80,000 feet max. 80,000 feet max.
Secure Digital Card 3.5 SD Bus Topology The SD bus has six communication lines and two supply lines: ‧ CMD: Command is bi-directional signal. (Host and card drivers are operating in push pull mode.) ‧ DAT0-3: Data lines are bi-directional signals. (Host and card drivers are operating in push pull mode.) ‧ CLK: Clock is a host to cards signal. (CLK operates in push pull mode.
Secure Digital Card 3.6 SPI Bus Topology The SD Card SPI interface is compatible with SPI hosts available on the market. As any other SPI device the SD Card SPI channel consists of the following 4 signals: 1) CS: Host to card Chip Select signal. 2) SCLK: Host to card clock signal. 3) DataIn: Host to card data signal. 4) DataOut: Card to host data signal. Another SPI common characteristic, which is implemented in the SD Card as well, is byte transfers.
Secure Digital Card 3.7 Electrical Interface The power up of the SD Card bus is handled locally in each SD Card and in the bus master. SPI Mode bus operating conditions are identical to SD Card mode bus operating conditions. The CS (chip select) signal timing is identical to the input signal timing. Power Supply Voltage General Parameter Symbol Peak voltage on all lines Min. Max. Unit -0.3 VDD+ 0.3 V -10 10 uA -10 10 uA Max.
Secure Digital Card 3.8 Bus Timing (Default) Timing Diagram Data Input/Output Referenced to Clock(Default) Parameter Symbol Min. Clock CLK (All values are referred to min.(VIH) and max.(VIL)) Max.
Secure Digital Card 3.9 Bus Timing ( High-Speed Mode) Timing Diagram Data Input/Output Referenced to Clock(High-Speed) Parameter Symbol Min. Clock CLK (All values are referred to min.(VIH) and max.(VIL)) Max.
Secure Digital Card 3.10 Operating Conditions Register (OCR) The 32-bit operation conditions register stores the VDD voltage profile of the card. The SD Card is capable of executing the voltage recognition procedure (CMD1) with any standard SD Card host using operating voltages form 2 to 3.6 Volts. Accessing the data in the memory array, however, requires 2.7 to 3.6 Volts. The OCR shows the voltage range in which the card data can be accessed. The structure of the OCR register is described in under table.
Secure Digital Card 4. SD Card Interface Description General Description of Pins and Registers The SD Card has 9 exposed contacts on one side. The host is connected to the SD Card using a 9 pin connector.
Secure Digital Card 5. Physical Outline Rev. A.
