Texas Instruments AM3894CCYG135

Overview

AM3894CCYG135 from Texas Instruments is a high-performance Sitara™ ARM® Cortex-A8 microprocessor (MPU) operating up to 1.20 GHz, featuring dual DDR2/DDR3 interfaces, two Gigabit Ethernet MACs, PCIe 2.0 x2-lane root complex/endpoint support, SATA 3.0 Gbps controller, and an integrated SGX530 3D graphics engine - deployed in industrial HMIs, interactive kiosks, and single-board computing platforms.

For engineers reviewing the AM3894CCYG135 datasheet, AM3894CCYG135 pinout, AM3894CCYG135 application, or AM3894CCYG135 equivalent, key selection criteria include ARMv7 compliance, 256KB L2 cache, HDVPSS video capture/display capability, 0.8-mm via-channel BGA routing compatibility, and TI's SmartReflex™ Level 2 power management for thermal-constrained embedded designs.

Technical Context

The AM3894CCYG135 implements an in-order, dual-issue, superscalar ARM Cortex-A8 core with NEON multimedia acceleration and VFPv3 floating-point support, backed by 32KB instruction and 32KB data caches plus 256KB unified L2 cache. Its memory subsystem includes a Dynamic Memory Manager (DMM) enabling programmable multi-zone memory mapping and interleaving for optimized 2D block and tiled object access.

Peripherals are interconnected via L3/L4 buses with dedicated DMA paths: the Enhanced Direct-Memory-Access (EDMA) controller provides 64 independent channels and 8 QDMA channels; the HD Video Processing Subsystem (HDVPSS) supports simultaneous dual 165-MHz HD video capture and display, including HDMI 1.3 transmitter with HDCP and three graphics layers; and the GPMC+ELM interface delivers glueless NAND/NOR/SRAM connectivity with hardware BCH error correction.

Key Specifications

Pinout & Package

AM3894CCYG135 uses a 1031-pin FCBGA package (CYG suffix) with 25.0 mm × 25.0 mm body size and 0.65-mm ball pitch. Via Channel™ technology enables 0.8-mm PCB trace/space design rules, reducing layer count and cost. Pin functions are multiplexed across 64 GPIOs, multiple serial interfaces (McASP, McBSP, I²C, SPI, UART), memory buses (DDR, GPMC), and high-speed peripherals (PCIe, SATA, HDMI).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ARM-based application processor applications.

Compared with AM3892CCYG135, the AM3894CCYG135 adds critical 3D graphics acceleration for rich UIs; versus AM4379BZDNA10, it retains PCIe/SATA for expandability and higher video bandwidth, though at older process node and narrower temp range.

Availability

AM3894CCYG135 is available at Aetrix Electronics and suitable for industrial HMIs, interactive kiosks, and single-board computing applications requiring stable component supply, long-term lifecycle assurance, and full documentation traceability.

Supply support for AM3894CCYG135 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

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in industrial, automotive, and communications markets.

The AM389x Sitara™ MPU family was designed to deliver scalable, high-performance ARM-based processing for human-machine interface, industrial automation, and networked embedded systems - combining rich peripherals with Linux-ready architecture.

FAQ

What is the maximum supported DDR3 speed for the AM3894CCYG135?

The AM3894CCYG135 supports DDR3-1600 (800 MHz clock, 1600 MT/s data rate) across its dual 32-bit interfaces, with total addressable space up to 2 GB. This requires strict adherence to JEDEC timing parameters, board-level impedance control, and proper termination as specified in the AM3894 technical reference manual. The DDR3 I/O operates at 1.5 V, separate from the 1.0-V core logic supply.

Does the AM3894CCYG135 include an integrated Ethernet PHY?

No, the AM3894CCYG135 integrates two Gigabit Ethernet MACs (EMACs) with GMII and MII interfaces but does not include physical layer transceivers. External PHY devices - such as the DP83849ID or TLK10031 - must be used for copper or fiber media attachment. The MDIO interface allows runtime configuration and status monitoring of those PHYs.

Can the AM3894CCYG135 operate as a PCIe endpoint or only as a root complex?

Yes, the AM3894CCYG135 PCIe 2.0 port is configurable as either a root complex or an endpoint, supporting x1 or x2 lane operation at 5.0 GT/s. Configuration is controlled via boot-time strap pins and register settings in the PRCM module. Endpoint mode enables use in add-in cards or mezzanine modules where the AM3894CCYG135 serves as a high-bandwidth peripheral rather than the system host.

What video output interfaces does the AM3894CCYG135 support natively?

The AM3894CCYG135 natively supports HDMI 1.3 (with HDCP) via integrated transmitter PHY, dual analog HD/SD video outputs (HD DACs + SD DACs), and three independent graphics layers. It does not include native LVDS or eDP transmitters - those require external bridge ICs. Simultaneous HDMI + analog output is supported, enabling primary display + secondary status panel configurations.

Is the AM3894CCYG135 pin-compatible with other AM389x variants like AM3892CCYG135?

Yes, AM3894CCYG135 and AM3892CCYG135 share identical FCBGA-1031 packaging, pinout, and electrical characteristics - differing only in silicon configuration (SGX530 enabled/disabled). This allows direct PCB reuse between the two, with software-defined enablement of graphics features. All power, clock, reset, and peripheral signal assignments match exactly per the AM389x datasheet pin assignment tables.