Sd Card Standard; Functional Description - SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual

Comfortable erase mechanism.
The performance of the communication channel is described in Table 1-2.
SD Card Using SD Bus
Six-wire communication channel (clock, command, 4
data lines).
Error-protected data transfer.
Single or multiple block oriented data transfer.

1.4. SD Card Standard

SanDisk SD Cards are fully compatible with the following SD Card Physical Layer Specification standard:
The SD Card Physical Layer System Specification, Version 1.01
This specification may be obtained from:
SD Card Association
53 Muckelemi St.
P.O. Box 189
San Juan Bautista, CA 95045-0189
USA
Phone: 831-623-2107
Fax: 831-623-2248
Email: rcreech@sdcard.org
http://www.sdcard.org

1.5. Functional Description

SanDisk SD Cards contain a high level, intelligent subsystem as shown in Figure 1-1. This intelligent
(microprocessor) subsystem provides many capabilities not found in other types of memory cards. These
capabilities include:
Host independence from details of erasing and programming flash memory.
Sophisticated system for managing defects (analogous to systems found in magnetic disk drives).
Sophisticated system for error recovery including a powerful error correction code (ECC).
Power management for low power operation.
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
Table 1-2. SD Bus/SPI Bus Comparison
Three-wire serial data bus (Clock, dataIn, dataOut) + card
specific CS signal (hardwired card selection).
Optional non-protected data transfer mode available.
Single or multiple block oriented data transfer.
Introduction to the SD Card
SD Card Using SPI Bus
1-3