Microchip Technology DM870-TE

Overview

DM870 from BridgeCo AG is a triple-core networked media processor integrating a 240MHz ARM926EJ system controller, a dedicated 160MHz secure co-processor for DRM enforcement, and a real-time Audio Engine delivering >600 MIPS computational power. It supports Wi-Fi 802.11a/b/g MAC/baseband, Ethernet 10/100, USB 2.0 OTG, SPDIF/I²S/I⁸S audio I/O, CCIR 656 video I/O, and integrated TFT/STN/DSTN LCD control - enabling full-featured networked music stations.

For engineers reviewing the DM870 datasheet, DM870 pinout, DM870 application, or DM870 equivalent, key selection considerations include its multi-core architecture partitioning real-time audio processing, hardware-accelerated DRM execution, and integrated networking peripherals - all in a single 292-ball mBGA package optimized for CE appliance design.

Technical Context

The DM870 implements functional partitioning across three dedicated processing domains: the ARM926EJ handles Linux-based system control and UPnP/DLNA middleware; the proprietary Audio Engine executes SIMD-parallelized real-time decoding (e.g., WMA-Lossless) and audio enhancement; the Secure Processor runs cryptographic primitives (AES, RSA, DTCP-5C) in isolated, tamper-resistant execution space. All cores share a unified memory map via a 16-bit SDRAM/SRAM controller with 256MB SDRAM addressing.

Hardware I/O acceleration includes on-chip Ethernet MAC with MII/RMII PHY interface and 25MHz PHY clock output, dual-role USB 2.0 OTG with 8 endpoints, integrated Wi-Fi baseband requiring only external RF transceiver, and low-jitter DCO-based digital clock recovery eliminating external VCOs for SPDIF and audio sampling.

Key Specifications

Pinout & Package

292-ball fine-pitch mBGA package (20×20 array, 0.8mm pitch, 17×17mm body size), lead-free, commercial temperature range (0°C to +70°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar networked media processor applications.

Compared with Marvell 88AP510 and NXP i.MX31, the DM870 uniquely integrates Wi-Fi baseband, secure co-processor, and real-time Audio Engine - enabling complete networked music station functionality in a single IC without external security or audio acceleration components.

Availability

DM870 is available at Aetrix Electronics and suitable for Internet Radio & Alarm Clock, Networked Music Stations, and AV Receiver Integration requiring stable component supply, long-term lifecycle support, and consistent sourcing for production programs.

Supply support for DM870 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

BridgeCo AG is a Swiss semiconductor company specializing in high-integration audio and networked media processors for consumer electronics.

The DM870 belongs to BridgeCo's Networked Media Processor product line, designed specifically to consolidate streaming, DRM, real-time audio processing, and connectivity into a single SoC for CE appliances - reducing system cost and time-to-market for music-centric devices.

FAQ

What is the primary function of the DM870 in a networked music station?

The DM870 serves as the central system-on-chip in a networked music station, integrating ARM926EJ system control, real-time Audio Engine for WMA-Lossless and MP3 decode, dedicated Secure Processor for DTCP-5C and AES decryption, and hardware-accelerated networking (Wi-Fi, Ethernet, USB OTG). The DM870 eliminates the need for multiple discrete ICs by consolidating these functions - enabling full DLNA/UPnP streaming, DRM enforcement, and multi-format audio playback in a single 292-ball mBGA package.

Does the DM870 include an integrated Wi-Fi solution?

Yes, the DM870 includes a fully integrated IEEE 802.11a/b/g Wi-Fi MAC and baseband subsystem. It requires only an external RF transceiver IC to achieve full wireless connectivity - no external Wi-Fi SoC or companion chip is needed. This integration reduces bill-of-materials count, PCB area, and RF design complexity while maintaining full protocol compliance and supporting concurrent operation with Ethernet and USB interfaces on the DM870.

What audio interfaces does the DM870 support for high-resolution playback?

The DM870 supports four I²S/I⁸S ports and four SPDIF interfaces, all operating at sample rates up to 192kHz. It also includes a stereo PWM-DAC with differential 3-level output capable of driving headphones or subwoofers directly in digital amplifier mode using an external H-bridge. These interfaces enable multi-zone audio distribution, high-resolution streaming, and flexible analog/digital output routing - all without requiring external audio codecs or interface bridges in the DM870-based design.

How does the DM870 handle Digital Rights Management (DRM)?

The DM870 incorporates a dedicated 160MHz Secure Processor that executes cryptographic operations for DTCP-5C, AES, 3DES, RSA, and Diffie-Hellman in hardware-isolated memory space. This prevents code/data spoofing and ensures robust enforcement of licensed content protection schemes - unlike software-only DRM implementations. The DM870's secure co-processor works in tandem with the Audio Engine and ARM926EJ to deliver end-to-end protected playback of premium music services such as Pandora and Rhapsody without compromising real-time audio performance.

Is the DM870 pin-compatible with other BridgeCo processors like the DM860 or DM865?

No, the DM870 is not pin-compatible with the DM860 or DM865. Although they share architectural similarities, the DM870 features 292 balls in a 20×20 mBGA array, whereas the DM860 uses a different ball count and layout. Pin assignments for Wi-Fi baseband, additional audio I/O, and enhanced LCD controller differ significantly. Migration between these devices requires PCB redesign. Reference designs and evaluation boards for the DM870 are specific to its package and signal mapping - confirming no mechanical or electrical interchangeability with earlier BridgeCo media processors.