SanDisk SD032 Manual descarregar pdf (Página 7)

1. Introduction to the SanDisk miniSD Card

The SanDisk miniSD Card is a Secure Digital (SD) card that uses flash-based memory specifically designed to meet

the security, capacity, performance and environmental requirements inherent in newly emerging audio and video

consumer electronic devices. The SanDisk miniSD Card includes a copyright protection mechanism that complies

with the security of the SDMI standard, and is faster and capable of higher memory capacity. The miniSD card

security system uses mutual authentication and a “new cipher algorithm” to protect against illegal usage of the card

content. A non-secured access to the user‘s own content is also available. The physical form factor: pin assignment

and data transfer protocol, with some additions, are forward compatible with the SD Card.

SanDisk miniSD Card communication is based on an advanced 9-pin interface (Clock, Command, 4xData and

3xPower lines) designed to operate in a low voltage range. The communication protocol is defined as part of this

specification. The miniSD Card host interface supports regular MultiMediaCard operation as well. In other words,

MultiMediaCard forward compatibility was kept. The main difference between the miniSD Card and the

MultiMediaCard is the initialization process. miniSD Card specifications were originally defined by MEI

(Matsushita Electric Company), Toshiba Corporation and SanDisk Corporation. Currently, the Secure Digital

Association (SDA) controls the specifications. The SanDisk miniSD Card was designed to be compatible with the

miniSD Card Physical Specification.

The miniSD Card interface allows for easy integration into any design, regardless of microprocessor used. For

compatibility with existing controllers, the SanDisk miniSD Card offers, in addition to the miniSD Card interface,

an alternate communication protocol based on the SPI standard.

The miniSD Card will provide up to 256 million bytes of memory using flash memory chips, which were designed

especially for use in mass storage applications. In addition to the mass storage specific flash memory chip, the

miniSD Card includes an on-card intelligent controller which manages interface protocols, security algorithms for

and diagnostics, power management and clock control.

Figure 1-1. SanDisk miniSD Card Block Diagram

1 2 3 4 5 6 7 8 9 10 11 12 ... 113 114

Sem comentários

SanDisk SD032 Manual Página 7