STMicroelectronics ST2100

Overview

ST2100 from STMicroelectronics is a broadband powerline communication (BB PLC) system-on-chip (SoC) integrating an ARM926EJ-S™ 32-bit RISC CPU running at up to 333 MHz, configurable HomePlug® AV/1.0/Green PHY hardware engine, integrated analog front-end with programmable gain amplifier (-12 dB to +48 dB), and cryptographic coprocessor supporting AES-128/192/256, DES/TDES, and SHA-1/256. It targets in-house audio/video distribution over AC wiring.

For engineers reviewing the ST2100 datasheet, ST2100 pinout, ST2100 application, or ST2100 equivalent, key selection criteria include its TFBGA373 package with 0.5 mm pitch, dual-mode PCIe Gen1/SATA-150 interface, real-time Ethernet AV traffic support (IEEE 802.1-AS/Qav), JPEG codec accelerator (1 clock/pixel), and 4-channel I2S digital audio interface for consumer-grade PLC bridging and smart gateway designs.

Technical Context

The ST2100 implements a multilayer AMBA AHB system bus with weighted round-robin arbitration, enabling parallel data flows between high-performance masters (CPU, DMA, Ethernet, USB) and slave peripherals (DDR controller, CLCD, TS interface). Its memory subsystem supports DDR mobile at 166 MHz and DDR2 at 333 MHz with five dedicated ports and local FIFOs to reduce latency.

Its application subsystem combines a programmable HomePlug PHY/MAC engine with an integrated analog front-end (AFE) featuring a 2.5 V, 150 mA regulator, zero-crossing comparator, and ADC/DAC - all optimized for noise-resilient PLC signal conditioning on live AC lines. The cryptographic coprocessor offloads AES/SHA operations via DMA-based channels, decoupling security processing from the main CPU.

Key Specifications

Pinout & Package

ST2100 is housed in a TFBGA373 package (12 × 12 × 1.2 mm, 0.5 mm ball pitch), with 324 signal balls plus 49 power/ground balls arranged in a 23 × 23 array (4R23 configuration). Pin functions are defined across dedicated and multiplexed I/O groups, including master clock (MCLK), RTC crystal, DDR, PCIe/SATA, USB, Ethernet MII, internal AFE, and 104 multi-function I/Os (MFIOs).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar broadband PLC SoC applications.

Compared with INT6400 and AR7400, the ST2100 uniquely integrates AFE, Green PHY hardware, JPEG acceleration, and TS interface in one die - reducing bill-of-materials by 7+ components while enabling simultaneous AV streaming and smart grid telemetry on shared AC infrastructure.

Availability

ST2100 is available at Aetrix Electronics and suitable for smart gateways, powerline-audio distribution systems, video surveillance nodes, and smart grid data concentrators requiring stable component supply across extended temperature ranges (-40 to +85 °C).

Supply support for ST2100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal solutions for automotive, industrial, and consumer markets.

The STreamPlug product line delivers integrated broadband PLC SoCs targeting noise-resilient, standards-compliant powerline networking for home automation, smart energy, and multimedia distribution - with ST2100 representing its flagship HomePlug AV/Green PHY platform.

FAQ

What operating systems are supported on the ST2100?

The ST2100 includes an ARM926EJ-S™ core with MMU and 16 KB instruction/data caches, enabling full Linux kernel execution. STMicroelectronics provides validated BSPs for Linux 2.6.x and later, along with uClinux for resource-constrained configurations. Real-time extensions are supported via RTAI patches, leveraging the VIC and timer peripherals.

Does the ST2100 require external memory for boot?

No. The ST2100 contains 48 KB of on-chip boot ROM and 8 KB of on-chip SRAM, enabling standalone boot from NAND Flash, NOR Flash (serial or parallel), or UART without external memory. Boot source is selected via MFIO pins at reset, and the ROM loader validates signature before executing code from external memory.

How is powerline noise mitigated in the integrated analog front-end?

The ST2100 AFE incorporates a zero-crossing (ZC) comparator that synchronizes PLC frame transmission to AC voltage zero crossings, avoiding high-noise periods. Its programmable gain amplifier (-12 dB to +48 dB) adapts dynamically to line impedance variations, and the 2.5 V regulator supplies clean bias to ADC/DAC stages - all implemented in-die to minimize PCB-level coupling.

Can the ST2100 operate as both PCIe Root Complex and Endpoint?

Yes. The ST2100's PCIe Gen1 peripheral supports dual-mode operation: it can function as a Root Complex (hosting downstream devices) or as an Endpoint (connecting to external hosts). Mode selection is configured via boot-time registers, and the standard 8-bit/16-bit PIPE PHY interface ensures interoperability with third-party PCIe switches and controllers.