SDCFCR-001G-388 SanDisk, SDCFCR-001G-388 Datasheet - Page 12

• Manufacturer Part Number: SDCFCR-001G-388
• Description: COMPACT FLASH IND 1GB
• Manufacturer: SanDisk

Specifications of SDCFCR-001G-388

• Memory Size: 1GB
• Memory Type: CompactFLASH
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SanDisk Industrial Grade CompactFlash 5000
1.7.3
Wear-leveling is an inherent part of the erase pooling functionality of SanDisk
CompactFlash 5000 using NAND memory.
The CF WEAR LEVEL command is supported as a NOP operation to maintain
backward compatibility with existing software utilities. Advanced features of
dynamic and static wear-leveling and automatic block management are used
to ensure high data reliability and maximize flash life expectancy.
1.7.4
Bad blocks are occasionally created during the life cycle of a flash component,
in a phenomenon called dynamic bad-block accumulation. These bad blocks
must be dynamically marked and replaced dynamically to prevent read/write
failures.
When a bad block is detected, the embedded Bad Block Mapping algorithm
maps out the block, which will no longer be used for storage.
1.7.5
SanDisk CompactFlash 5000 supports the CF ERASE SECTOR and WRITE
WITHOUT ERASE commands.
In some applications, write operations may be faster if the addresses being
written are first erased with the ERASE SECTOR command. WRITE WITHOUT
ERASE behaves as a normal write command and no performance gain results
from its use.
1.7.6
A unique feature of the SanDisk CompactFlash 5000 is automatic entrance and
exit from sleep mode.
If no further commands are received within 5 msec of completion of a
command, the card will enter sleep mode to conserve power.
The host does not have to take any action for this to happen. In most
systems, the CompactFlash 5000 is in sleep mode except when being accessed
by the host, thus conserving power.
The waiting period from command completion to entering sleep mode is
adjustable.
When the host is ready to access the card and the card is in sleep mode, any
command issued to it will cause the card to exit sleep mode and respond.
The host does not have to follow the ATA protocol of issuing a reset first. It
may do this if desired, but it is not necessary. Not issuing the reset improves
reduces overhead and improves performance, but this must be done only for
the SanDisk products as other ATA products may not support this feature.
1.7.7
This is a dual voltage product, meaning that it will operate at a voltage range
of 3.30 volts ± 5% or 5.00 volts ± 10%.
Per the PCMCIA specification Section 2.1.1, the host system must apply 0
volts in order to change a voltage range.
© 2007 SanDisk® Corporation
Wear Leveling
Bad Block Management
Using Erase Sector and Write Commands
Automatic Sleep Mode
Power Supply Requirements
5
Product Manual
April 2007