Texas Instruments AM1806EZWT4

Overview

AM1806EZWT4 from Texas Instruments is a 375-MHz or 456-MHz ARM926EJ-S™ RISC microprocessor with integrated DDR2/mDDR memory controller, USB 2.0 OTG with PHY, three UARTs, two McBSps, one McASP, LCD controller, uPP, VPIF, PRUSS dual-core subsystem, and 168KB on-chip RAM. It targets embedded industrial and multimedia applications requiring real-time I/O control and OS support.

For engineers reviewing the AM1806EZWT4 datasheet, AM1806EZWT4 pinout, AM1806EZWT4 application, or AM1806EZWT4 equivalent, this page delivers verified technical context, validated package mapping (361-ball NFBGA, 16 mm × 16 mm, 0.80-mm pitch), confirmed peripheral register layout, and precise alternative selection guidance for industrial automation, medical devices, and set-top box designs.

Technical Context

The AM1806EZWT4 implements an ARM926EJ-S core with MMU, 16KB instruction and 16KB data caches, 8KB vector RAM, and 64KB ROM. Its subsystem integrates CP15, ETB (4KB), write buffer, and AHB interfaces to external memory and peripherals.

Peripheral connectivity includes EMIFA supporting NOR/NAND/SDRAM, DDR2/mDDR controller (16-bit bus, up to 156 MHz), EDMA3 with 64 independent DMA channels and 16 QDMA channels, and programmable real-time units (PRUSS) with two 32-bit RISC cores-each with 4KB IRAM and 512B DRAM-exporting R30/R31 registers for hardware synchronization.

Key Specifications

Pinout & Package

AM1806EZWT4 uses a 361-ball NFBGA package (ZWT suffix), 16.00 mm × 16.00 mm body size, 0.80-mm ball pitch, RoHS-compliant Pb-free construction. Pin functions are multiplexed across 9 banks of GPIO and dedicated peripheral signals; full assignment requires reference to Table 3-7 (Pin Assignments) and Table 3-37 (Terminal Functions) in SPRS658F.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ARM9-based applications.

Compared with AM1806EZWT4, AM1808ZWT offers higher clock headroom and memory addressing for demanding multimedia workloads, while AM1707ZCE trades DDR2/PRUSS/video capability for smaller size and lower cost - enabling scalable platform design across performance tiers.

Availability

AM1806EZWT4 is available at Aetrix Electronics and suitable for industrial automation controllers, medical imaging terminals, and set-top box media processors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AM1806EZWT4 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 specializing in analog, embedded processing, and wireless technologies, with decades of leadership in industrial and automotive-grade microprocessors.

The AM1806EZWT4 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-sensitive, low-power embedded applications requiring rich peripheral integration, real-time I/O control, and Linux/RTOS compatibility.

FAQ

What is the maximum operating frequency of the AM1806EZWT4?

The AM1806EZWT4 operates at 375 MHz when supplied with 1.2 V to the core, or 456 MHz at 1.3 V. These frequencies are specified under recommended operating conditions in SPRS658F Section 5.3 and define the upper bound for deterministic instruction execution and peripheral timing budgets in real-time applications.

Does the AM1806EZWT4 include an integrated memory controller for DDR2 or mobile DDR?

Yes, the AM1806EZWT4 integrates a DDR2/mDDR memory controller supporting 16-bit bus width, up to 156 MHz DDR2 or 150 MHz mDDR operation, and 256-MB address space. This controller is distinct from the EMIFA and enables high-bandwidth, low-latency access to external synchronous memory without external PHY or controller ICs.

How many UART interfaces does the AM1806EZWT4 provide, and what features do they support?

The AM1806EZWT4 includes three fully independent 16550-type UART modules, each with RTS/CTS hardware flow control, 16-byte FIFO, and 16× or 13× oversampling. These UARTs support standard serial communication for debugging, fieldbus gateways, and sensor telemetry in industrial and medical systems.

What is the role of the PRUSS in the AM1806EZWT4, and how is it accessed?

The PRUSS in the AM1806EZWT4 consists of two independent 32-bit RISC cores (PRU0/PRU1), each with 4KB IRAM and 512B DRAM. It is accessed via memory-mapped registers at 0x0000_0000–0x0000_0FFF and exports R30/R31 for hardware synchronization. PRUSS offloads time-critical tasks like PWM generation, encoder counting, and protocol bit-banging from the ARM core.

Is the AM1806EZWT4 pin-compatible with other members of the AM18xx family?

AM1806EZWT4 shares the same 361-ball ZWT package and pinout with AM1808ZWT, enabling drop-in replacement where higher clock speed or DDR2 address space is needed. However, it is not pin-compatible with ZCE-package variants (e.g., AM1806ZCE) due to differing ball pitch and mechanical dimensions.