Solid State drives 3 min read
Controller Functions – Wear Leveling
Wear Leveling and Sequential Writing to NAND Memory: The image above shows a 256KB NAND block which is comprised of…
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Channels and Banks
There is a control line which selects either Bank 1 or Bank 2 to be active on the Data/Control Bus…
Solid State drives 2 min read
Controller Architecture – Basic Overview
The reason for the controller function is to manage the NAND components and create a standard interface which interfaces well…
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NAND Architecture – Strings and Arrays
Diagram of a Single NAND Flash Cell: Combining Individual NAND Flash Cells into a String: All by itself, a single…
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How MLC and TLC store more than one bit per cell
The example above shows a SLC (Single Level Cell) NAND Cell. When any current is detected between the source and…
Solid State drives 2 min read
What does a NAND Cell look like?
A simple NAND Flash Cell diagram is shown above. The NAND flash cell is made from a floating gate transistor. Electrical…
Solid State drives 6 min read
Solid State Drives (SSD) Upgrade – 5 Things You Should Know
If you’re thinking of getting a Solid State Drive (SSD) for your desktop or laptop computer, here are a few…
Solid State drives 5 min read
The Need for High Speed Interfaces
Processor vendors have continued to ramp the performance of individual processor cores, to combine multiple cores in one chip, and…
Solid State drives 3 min read
PCI-Express
PCI-Express (Peripheral Component Interconnect Express) or PCIe is a bus standard that replaced PCI and PCI-X. PCI-SIG (PCI Special Interest…
Solid State drives 4 min read
SAS and SATA
Serial Attached SCSI (SAS) is a communication protocol traditionally used to move data between storage devices and host. SAS is…
Solid State drives 2 min read
Garbage Collection
Both wear leveling techniques rely on the availability of free sectors that can be filled up with the updates: as…
Solid State drives 4 min read
Flash Controller
A memory controller has two fundamental tasks: 1. provide the most suitable interface and protocol towards both the host and…