Project Description

S281

SD Memory Card Controller

  • S281 is a single-chip controller for Secure Digital (SD) memory card. It was designed based on SD1.0, SD1.1, SD2.0, SD3.0 specifications. S281 manages interface protocol, data storage and retrieval, error detection and correction, defect handling and diagnostic, as well as low power control. Besides standard form- factor SD cards. S281 fits MicroSD (TF) card too.
  • S281 provides CPRM function defined by SD Associations as a normal SD controller does. Moreover, S281 is a distinguishing controller by providing extra hardware encryption & decryption modules to meet current market demands on data security . These modules carry out world’s most popular algorithms such as AES, DES/3DES, etc.
  • Note: The TF card with S281 controller passed mobile payment certificates of China UnionPay.

Besides bare die or wafer delivered to the customers usually. S281 also can be shipped with LQFN46 or LQFP64 package.

SD Interface
  • SD Spec.V1.0
  • SD Spec.V1.1
  • SD Spec.V2.0
  • SD Spec.V3.0
Data Security
  • CPRM
  • AES-128/256
  • GOST
  • DES/3DES
  • TRNG
FLASH interface
  • Most vendor’s Flash chips
  • Support 8 CEs
  • Support dual-channel mode
  • Flash Management: Wear-Leveling, Homogeneous, etc.
  • Error Correction (ECC) up to 72bit
Peripheral Interface
  • SPI
  • ISO-7816
  • PWM
  • Super SPI (SSPI) dock up to 50MHz.
Data Access Speed
  • Single Channel SLC flash:
    Sequential Read 20MB/S
    Sequential Write 12MB/S
  • Single Channel MLC flash:
    Sequential Read 16MB/s
    Sequential Write 8MB/s
Power & ESD
  • Support two power modes: 3.3V &1.8V
  • ESD 8KV