SDCFJ-1024-388 SanDisk, SDCFJ-1024-388 Datasheet - Page 11

• Manufacturer Part Number: SDCFJ-1024-388
• Description: COMPACT FLASH 1GB
• Manufacturer: SanDisk
• Type: CompactFlashr

Specifications of SDCFJ-1024-388

• Memory Size: 1GB
• Memory Type: CompactFLASH
• Density: 1GByte
• Operating Supply Voltage (typ): 3.3/5V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Package Type: Not Required
• Mounting: Socket
• Pin Count: 50
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3.135/4.5V
• Operating Supply Voltage (max): 3.465/5.5V
• Programmable: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Introduction to the CompactFlash Memory Card
1.6.1. Technology Independence
The 512-byte sector size of the CompactFlash Memory Card is the same as that in an IDE magnetic disk drive. To
write or read a sector (or multiple sectors), the host computer software simply issues a Read or Write command to
the CompactFlash Memory Card. This command contains the address and the number of sectors to write/read. The
host software then waits for the command to complete. The host software does not get involved in the details of how
the flash memory is erased, programmed or read. This is extremely important as flash devices are expected to get
more and more complex in the future. Since the CompactFlash Memory Card Series uses an intelligent on-board
controller, the host system software will not require changing as new flash memory evolves. In other words, systems
that support the CompactFlash Memory Card today will be able to access future SanDisk cards built with new flash
technology without having to update or change host software.
1.6.2. Defect and Error Management
CompactFlash Memory Cards contain a sophisticated defect and error management system. This system is
analogous to the systems found in magnetic disk drives and in many cases offers enhancements. If necessary,
CompactFlash Memory Cards will rewrite data from a defective sector to a good sector. This is completely
transparent to the host and does not consume any user data space.
The CompactFlash Memory Card soft error rate specification is much better than the magnetic disk drive
specification. In the extremely rare case a read error does occur, CompactFlash Memory Cards have innovative
algorithms to recover the data.
These defect and error management systems, coupled with the solid state construction, give CompactFlash Memory
Cards unparalleled reliability.
1.6.3. Wear Leveling
Wear Leveling is an intrinsic part of the Erase Pooling functionality of SanDisk CF using NAND memory. The CF
WEAR LEVEL command is supported as a NOP operation to maintain backward compatibility with existing
software utilities.
1.6.4. Using the Erase Sector and Write without Erase Commands
CompactFlash Memory Cards support 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.
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CompactFlash
Memory Card Product Manual, Rev. 11.0 ©2006 SanDisk Corporation