Epson Develops Host Controller LSI

Epson Develops Host Controller LSI




Singapore May 4 2009: Seiko Epson Corporation ("Epson", TSE: 6724) has developed the S1R72E11 host controller LSI designed exclusively for SD memory cards and ideally suited for embedded devices. Shipment of samples has already commenced with a sample price of 650 yen per unit.


Use of the SD memory card, which has become the de facto standard for memory cards, has become common worldwide for a wide range of applications. The SD memory card makes it easier for users to transport stored data because is not only compact, but also offers increasingly high capacities and speeds. The SD memory card is an extremely convenient type of media that can be used with various types of devices, including personal computers. Demand for SD memory cards in embedded devices has also grown dramatically in recent times.


The newly developed S1R72E11 has been equipped exclusively with a SD memory card control function in order to achieve both a slimmer structure and a lower price. This product can be connected to a universal bus on an existing CPU, eliminating the need for major system upgrades and allowing for speedy, simple SD memory card control. By using the sample firmware provided free of charge, it is also possible to reduce development costs and work hours for product development involving the installation of SD memory cards for the first time.


With a wide operating temperature range of -40°C to 85°C and a capability for high-speed transfer, this product supports a wide variety of applications for consumer and industry devices. The S1R72E11 is also compatible with SDHC cards, currently the most popular type of SD memory card with capacities in excess of 2GB, and supports SD Speed Classes 2, 4, and 6, eliminating concerns about the type of media that can be used with it.

System block diagram


  • Slim structure
  • Easy to add on
  • Speedy development
  • Cost reductions

Special features of the S1R72E11


SD host controller functions

  • Compliant with SD Physical Layer Specification Ver.2.0
  • Transfer clock: 50 MHz (max.)
  • Supports SDHC cards
  • Bus width: 4 bit/1 bit

CPU interface functions

  • 6-bit asynchronous CPU bus interface
  • DMA: 1 ch
  • Supports Little Endian/Big Endian

Main specifications

Supply voltage
Operating temperature range
Sample price
Power management
Clock input
3.3 V ±0.3 V (single source)
-40°C to 85°C
TQFP13-64 pin
Available now
650 yen (excluding tax)
Equipped with SLEEP function (oscillation circuit shutdown mode)
External input or crystal oscillator (max. 50 MHz)

Available documents

  • Data sheet
  • Hardware technical manual
  • Software manual/API manual
  • Sample firmware (driver software for source code level)

For customers requiring content protection for recordable media (CPRM)


The S1R72E11 does not support CPRM. However, the S7R72E01, which is currently in volume production, makes it possible to conduct trouble-free product development in a short period of time when using SD memory cards in combination with a CPRM function.


Details on the S1R72E11 and related products as well as documents can be obtained from the site below.


For enquiries, please locate your regional Epson electronic device sales office at:

Posted on Monday, May 04, 2009 (Archive on Monday, January 01, 0001)
Posted by teaustralia  Contributed by teaustralia