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 3.0 and eMMC 4.5. 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. The Core is designed to operate at maximum operating frequency of 208 MHz(SD) / 200 MHz (eMMC) to achieve maximum throughput of 104Mbytes/sec for SD and 200Mbytes/sec for eMMC.

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	MMC4.5
Clock	Up to 50MHz	Up to 208MHz		RCLK:  26-52 MHz Bit Clock:780-1560 MHz	Up to 20MHz	Up to 200MHz
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 2TB
Clock Tuning	NA	Supported		NA	NA	Supported
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

 

Configuration

• Number of Slots [1/2].
• Number of functions [1/2]
• Buffer Size [DPRAM/SPRAM,512B/1KB/2KB/4KB/8KB].
• System Interface [AXI/AHB/APB].
• Data Transfer [PIO/DMA/ADMA/Slave DMA].
• SD/MMC Bus Width [1,4/8] bits.

 

Applications

• SDIO LTE, Wimax, Wi-Fi, Bluetooth, GPS.
• SD/MMC Memory, HD Video Streaming, Smart Phones, PDA.
• eSD/eMMC Embedded Flash Drive.
• SD/SDIO Combo –Wi-Fi/Bluetooth/Memory/GPS.
• WiFi • GPS • SD Video/Audio • Cell phone • SDXC.