SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Manual download pdf (Page 9)

Introduction to the Industrial Grade SD Card

• Comfortable erase mechanism.

The performance of the communication channel is described in Table 1-2.

Table 1-2. SD Bus/SPI Bus Comparison

Industrial Grade SD Card Using SD Bus Industrial Grade SD Card Using SPI Bus

Six-wire communication channel (clock, command, 4

data lines).

Three-wire serial data bus (Clock, dataIn, dataOut) + card

specific CS signal (hardwired card selection).

Error-protected data transfer. Optional non-protected data transfer mode available.

Single or multiple block oriented data transfer. Single or multiple block oriented data transfer.

1.4. SD Card Standard

SanDisk Industrial Grade 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

http://www.sdcard.org

1.5. Functional Description

SanDisk Industrial Grade 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.

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SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Manual Page 9