Texas Instruments AM1810EZWTA3

Overview

AM1810EZWTA3 from Texas Instruments is a 375-MHz ARM926EJ-S™ microprocessor with integrated Programmable Real-Time Unit Subsystem (PRUSS) optimized for PROFIBUS industrial communication, featuring 16KB instruction cache, 16KB data cache, and dual 10/100 Mbps Ethernet MAC interfaces - deployed in industrial automation gateways and fieldbus protocol converters.

For engineers reviewing the AM1810EZWTA3 datasheet, AM1810EZWTA3 pinout, AM1810EZWTA3 application, or AM1810EZWTA3 equivalent, this page delivers verified specifications, PRUSS-based real-time I/O control capability, DDR2/mDDR memory interface timing, SATA I/II host support, and confirmed alternative options for PROFIBUS-capable ARM9 MPUs.

Technical Context

The AM1810EZWTA3 implements a dual-core PRUSS subsystem tightly coupled to the ARM926EJ-S CPU via shared on-chip memory and EDMA3, enabling deterministic low-latency response for PROFIBUS DP slave timing - with register R30 of each PRU exported externally for hardware synchronization. Its memory architecture includes unified MMU, VIVT caches, and 128KB on-chip SRAM accessible by both ARM and PRUSS.

Real-time operation is reinforced by three 64-bit general-purpose timers (one configurable as watchdog), eHRPWM modules with dead-band generation, and eCAP modules supporting single-shot timestamp capture - all mapped into a fixed memory space starting at 0x01C2_0000 and managed under PSC clock gating domains.

Key Specifications

Pinout & Package

AM1810EZWTA3 uses a 361-ball Pb-free NFBGA package (ZWT suffix) with 0.80-mm ball pitch and 16 mm × 16 mm body size. Pin functions are multiplexed across nine GPIO banks and dedicated peripheral pads, requiring configuration via SYSCFG registers.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar industrial ARM9 MPU applications.

Compared with AM1808BZWT and AM3352BZCZD, the AM1810EZWTA3 uniquely combines PROFIBUS-optimized PRUSS, dual Ethernet, and SATA in a mature industrial-qualified package - making it the only option for cost-sensitive, high-integration PROFIBUS DP slave designs requiring local mass storage.

Availability

AM1810EZWTA3 is available at Aetrix Electronics and suitable for industrial automation gateways, PROFIBUS DP slave nodes, and smart sensor hubs requiring stable component supply through 2028 and beyond.

Supply support for AM1810EZWTA3 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The AM1810 product line was designed specifically for PROFIBUS-enabled industrial control applications - integrating real-time PRUSS alongside ARM9 performance to replace FPGA+MPU combinations in field devices and protocol gateways.

FAQ

What is the maximum DDR2 clock frequency supported by the AM1810EZWTA3?

The AM1810EZWTA3 DDR2/mDDR controller supports up to 156 MHz for DDR2 and 150 MHz for mobile DDR, as specified in Section 3.1 of SPRS709D. This enables sustained 1.2 GB/s peak bandwidth using a 16-bit bus - sufficient for real-time video capture and buffered PROFIBUS data logging. The AM1810EZWTA3 requires calibrated ODT and write-leveling sequences during initialization.

Does the AM1810EZWTA3 include hardware support for PROFIBUS DP slave functionality?

Yes - the AM1810EZWTA3 integrates a Programmable Real-Time Unit Subsystem (PRUSS) with two 32-bit PRU cores explicitly designed for PROFIBUS DP slave implementation. TI provides certified PROFIBUS firmware and PRU assembly libraries in the AM1810 PRUSS SDK, enabling sub-100 µs cycle response without ARM CPU involvement. This capability is unique to the AM1810EZWTA3 within the AM18xx family.

Can the AM1810EZWTA3 operate with a 3.3-V I/O supply while using 1.2-V core voltage?

Yes - the AM1810EZWTA3 supports mixed-voltage operation: 1.2-V core (VDD_CORE) and 1.8-V or 3.3-V I/O (VDDSHVx). Section 5.3 of SPRS709D confirms 3.3-V LVCMOS compatibility for all non-USB/non-DDR2 pins. This allows direct interfacing with legacy 3.3-V industrial peripherals like RS-485 transceivers and optocoupled GPIO without level shifters.

What debug interfaces are available on the AM1810EZWTA3?

The AM1810EZWTA3 provides JTAG (IEEE 1149.1) for boundary scan and ARM core debugging, plus an Embedded Trace Buffer (ETB) with 4KB memory for instruction/data trace capture. It does not expose the ETM trace port externally - trace data must be read via JTAG. The ARM926EJ-S core also supports Embedded ICE-RT for real-time breakpoint and watchpoint triggering during PROFIBUS runtime.

Is the AM1810EZWTA3 pin-compatible with other AM18xx variants such as AM1808?

Yes - the AM1810EZWTA3 shares the identical 361-ball ZWT package, pinout, and ball pitch with AM1808BZWT and AM1806BZWT. However, unused pins differ due to missing peripherals (e.g., SATA, second EMAC), and PRUSS signals are reserved but unconnected on non-PRUSS variants. Layout reuse is possible, but firmware and power delivery must be validated per variant.