Built-in switching regulator (5V to 1V) and LDO (5V to 3.3V).
– A comprehensive, well-structured, but dense document for a market-leading, dual-protocol bridge chip.
integrates both controller layers into a single slice of silicon.
The Realtek RTL9210B is a highly versatile, high-performance bridge controller that has revolutionized the external storage market. By bridging PCI Express (PCIe) and Serial ATA (SATA) interfaces to USB, this system-on-chip (SoC) allows manufacturers to create universal external drive enclosures. rtl9210b datasheet
: Automatically switches between USB-to-PCIe and USB-to-SATA modes based on the connected M.2 drive . Performance :
This article dives into the specifications, capabilities, and technical nuances of the RTL9210B to help engineers and tech enthusiasts understand why this chip dominates the market. 1. What is the RTL9210B?
The RTL9210B datasheet is far more than a dry specification document; it's a manual that unlocks a world of high-speed, flexible storage. It is the definitive source for understanding the chip's intelligent dual-protocol design, its comprehensive power management, and its precise technical requirements. Built-in switching regulator (5V to 1V) and LDO (5V to 3
Requiring 100-ohm differential impedance, these lines must be kept as short as possible to prevent signal attenuation.
Features automatic switching between USB-to-PCIe (NVMe) and USB-to-SATA bridging.
+--------------------------------------------+ | Realtek RTL9210B | | | | +-----------------+ | | | USB 3.2 Gen 2 | <=======> USB Host | | | (10 Gbps) PHY | (Type-C) | | +-----------------+ | | ^ | | | (Protocol Bridging) | | v | | +-----------------+ | | | Dual M.2 Engine | | | +-----------------+ | | / \ | | v v | | +-------+ +-------+ | | | PCIe | | SATA | | | | Gen3 | | III | | | | x2 | |6 Gbps | | | +-------+ +-------+ | +------|-------------|-----------------------+ v v M.2 NVMe M.2 SATA SSD SSD Key Technical Specifications The Realtek RTL9210B is a highly versatile, high-performance
| Specification Category | Technical Details | | :--- | :--- | | | RTL9210B-CG (Standard), RTL9210BPD-CG (with Power Delivery) | | Function | USB to PCI Express / SATA Bridge Controller | | USB Interface | USB 3.2 Gen 2x1 (up to 10 Gbps), backwards compatible with USB 3.0/2.0/1.1 | | Storage Interface | PCIe Gen3 x2 (up to 16 Gbps) & SATA Gen3 (up to 6 Gbps) | | Key Feature | Dual Protocol : Auto-switches between NVMe (PCIe) and SATA M.2 SSDs via the PEDET interface | | Package | 68-pin QFN (8mm x 8mm), Green package | | Clocking | Supports 25MHz crystal clock | | External Memory | Supports up to 32Mbytes External SPI Flash for firmware | | Supported Protocols | UASP (USB Attached SCSI Protocol), BOT (Bulk-Only Transfer), TRIM, AHCI, NVM Express | | Power Management | Built-in switching regulator (5V to 1V) & LDO (5V to 3.3V), ASPM L1, L1 substate, CLKREQ | | Additional Interfaces | UART, GPIOs, eFUSE, I2C, customizable LED control |
Fully compliant with NVM Express base specifications, translating USB Mass Storage Class Bulk-Only Transport (BOT) and USB Attached SCSI Protocol (UASP) requests straight into native NVMe commands. 2. Serial ATA (SATA) Protocol Engine
: Custom RAM and ROM to handle the heavy lifting of NVMe-to-USB translation.
The RTL9210B is a high-performance bridge controller.
According to the datasheet, the RTL9210B is built on an advanced process node to minimize power consumption while maximizing throughput.