Silicon Motion’s native USB 3.2 Gen 2×2 SM2320 controller for USB flash drives and portable SSDs has enjoyed great success in the marketplace, with multiple design wins over the past few years. Silicon Motion is proud to showcase a selection of SM2320-based products at FMS 2024.
The SM2320 went into mass production in Q3 2021. The NAND flash market has changed significantly since then, with QLC becoming increasingly reliable and mainstream, leading to the introduction of high-performance 4TB and 8TB SSDs, and newer generations of NAND flash running at higher speeds.
The SM2320, fabricated on TSMC’s 28nm node, supported four NAND flash channels operating at speeds of up to 800 MT/s. The new SM2322 uses the same process node and retains support for the same number of flash channels and chip enables (8 CEs per channel). However, the NAND can now operate at speeds of up to 1200 MT/s.
The SM2322 also improves QLC support by implementing a better ECC scheme. While the SM2320 opted for a 2KB LDPC implementation, the SM2322 opts for a 4KB LDPC solution. The use of a larger area allows for an extended useful life of the NAND.
The SM2322 and SM2320 packages are similar in size, and Silicon Motion expects PSSD designs using the SM2320 to adopt SM2322 with different NAND (higher capacity/speed) using the same package. Products based on the SM2322 should hit the market before the end of the year.
