Posedge SD/SDIO/eMMC Solutions
Posedge offers complete solutions to enable the Secure Digital, Secure Digital IO, Embedded Multi-Media Card Host and Device applications. Our off-the-shelf IP products provide easy integration and significant time-to-market advantage to our customers. Fully-compliant with the latest SD standard Version 4.0, 3.0 and eMMC 4.4, our IPs are interoperated with third-party vendors to enable seamless migration across different SD platforms. IP deliverables include RTL IP source code, Software Drivers, and Evaluation/Reference board.
Market Overview
Posedge Differentiators
• Complete Solution Provider (RTL IP, Software, and Evaluation board)
• Lowest gate count and Highest Performance
• Advance techniques to reduce power consumption
• Scalable Architecture and Multiple interface options
•
World class customer support
Technology Overview
SD (Secure Digital) is a non-volatile memory card format developed by Panasonic, Sandisk, and Toshiba for use in portable devices. The SD Association (SDA) is an open industry standards organization established in January 2000 by leaders Matsushita Electric (Panasonic), SanDisk, and Toshiba, supported by a consortium of over 500 companies. Posedge is a member of SD Association (SDA) and participates in the Standard development and evolution.
The following chart shows the evolution of the SD from Standard SD cards offering an official maximum capacity of 2 GB to SDHC (High-capacity) cards having a maximum capacity of 32GB to SDXC (eXtended Capacity) allowing up to 2TB cards. Over a period of time, Throughputs have gone up from 12.5 MB/s to 300 MB/s with the latest SD Version 4.0 standard.
|
SD2.0 |
SD3.0 |
SD4.0 |
MMC3.31 |
MMC4.x |
Clock |
Up to 50MHz |
Up to 208MHz |
RCLK: 26-52 MHz
Bit Clock:780-1560 MHz |
Up to 52MHz |
Up to 52MHz |
Data Width |
1 or 4bit |
1 or 4 or 8bit |
1 or 2 or 4bit |
1bit |
1 or 4 or 8bit |
Pins |
9 Pins |
9 Pins |
Configurable |
7 Pins |
13 Pins |
Throughput |
200Mbits/sec |
832Mbits/sec |
1 Lane: 156MB/sec -
312MB/sec |
20Mbits/sec |
832Mbits/sec |
Capacity |
Up to 32GB |
Up to 2TB |
Up to 2TB |
Up to 4GB |
Up to 32GB |
Clock Tuning |
NA |
Supported |
NA |
NA |
NA |
Voltage |
1.8V / 3.3V |
DS - 3.3V
HS - 3.3V SDR12 – 1.8V
SDR25 - 1.8V
SDR50 - 1.8V
SDR104 - 1.8V
DDR50 - 1.8V |
1.8V |
High voltage MMC – 2.7V to 3.6V
Dual voltage MMC –
1.7V -1.95V
2.7V - 3.6V |
High voltage MMC – 2.7V to 3.6V
Dual voltage MMC –
1.7V -1.95V
2.7V - 3.6V |
Data Transfer |
SDR |
SDR, DDR |
SDR |
SDR |
SDR, DDR |
CMD/DATA Driving |
DS: Falling Edge
HS: Rising Edge
UHSI (except DDR): Rising Edge
DDR: Rising and Falling Edge |
Analog Bit Stream |
SDR: Rising Edge
DDR: Rising and Falling Edge |
CMD/DATA
Sampling |
SDR: Rising Edge
DDR: Rising and Falling Edge |
Analog Bit Stream |
SDR: Rising Edge
DDR: Rising and Falling Edge |
Applications
