Texas Instruments AM1802EZWTD3

Overview

AM1802EZWTD3 from Texas Instruments is a 300-MHz ARM926EJ-S™ RISC microprocessor with integrated 10/100 Mbps Ethernet MAC, USB 2.0 OTG (with PHY), dual SPI, I²C, three UARTs, MMC/SD interface, McASP audio port, EDMA3 controller, and DDR2/mDDR memory controller - deployed in industrial HMI, medical devices, and building automation systems.

For engineers reviewing the AM1802EZWTD3 datasheet, AM1802EZWTD3 pinout, AM1802EZWTD3 application, or AM1802EZWTD3 equivalent, key selection criteria include ARM926EJ-S core performance at 1.2 V, 361-ball NFBGA package (ZWT, 0.80-mm pitch), industrial temperature range, and support for real-time OS deployment on 128KB on-chip RAM + external DDR2/SDRAM.

Technical Context

The AM1802EZWTD3 implements a full-featured ARM926EJ-S subsystem with MMU, 16KB instruction and 16KB data caches, 8KB vector RAM, and 64KB ROM - enabling robust Linux and RTOS execution. Its memory architecture supports simultaneous access to EMIFA (NOR/NAND/SDRAM) and high-speed DDR2/mDDR (16-bit, up to 156 MHz).

Peripheral integration includes a programmable 10/100 Mbps EMAC with MII/RMII and MDIO, USB 2.0 OTG with integrated PHY and endpoint support (control, bulk, interrupt, isochronous), and McASP with 16 serializers, TDM/I²S/DIT capability, and TX/RX FIFOs - all managed via EDMA3 with 64 independent channels and dual channel controllers.

Key Specifications

Pinout & Package

AM1802EZWTD3 uses a 361-ball NFBGA (ZWT package) with 0.80-mm ball pitch and 16 mm × 16 mm body size. Pin functions are fully multiplexed and configured via hardware strapping and software registers at reset.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ARM microprocessor applications.

Compared with AM1802EZWTD3, AM1806ZWT offers higher clock speed and PCIe/SATA but increases cost and power; AM3352BZCZ100 delivers greater CPU performance and PRU flexibility but removes McASP and changes memory interface - making AM1802EZWTD3 the optimal choice for balanced audio/network/embedded Linux applications in industrial temperature grade.

Availability

AM1802EZWTD3 is available at Aetrix Electronics and suitable for medical patient monitors, ePOS terminals, and building automation gateways requiring stable component supply, long-term lifecycle assurance, and industrial-grade thermal reliability.

Supply support for AM1802EZWTD3 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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The AM1802 product line targets cost-optimized, low-power ARM9-based applications in healthcare, retail, and building infrastructure - emphasizing integrated connectivity, real-time OS readiness, and industrial environmental resilience.

FAQ

What is the maximum operating frequency of the AM1802EZWTD3?

The AM1802EZWTD3 operates at a maximum CPU frequency of 300 MHz with a nominal 1.2-V core supply voltage. This frequency is validated across the full industrial temperature range (–40°C to +85°C) and supports sustained execution of Linux kernels and real-time tasks without thermal throttling in properly heatsinked designs. The AM1802EZWTD3 does not support dynamic frequency scaling; clock stability is maintained via integrated PLLs with external 32.768-kHz and programmable reference clocks.

Does the AM1802EZWTD3 include an integrated USB PHY?

Yes, the AM1802EZWTD3 integrates a full-speed and high-speed USB 2.0 OTG PHY compliant with the USB 2.0 specification. This eliminates the need for an external transceiver in most designs. The USB0_DP and USB0_DM pins connect directly to the USB connector, and the controller supports all four endpoint types (control, bulk, interrupt, isochronous) in both host and device modes - confirmed in the SPRS710E datasheet Section 6.18.

What memory interfaces does the AM1802EZWTD3 support?

The AM1802EZWTD3 supports two independent external memory interfaces: (1) DDR2/mDDR controller (16-bit bus, up to 156 MHz, 256-MB address space), and (2) EMIFA supporting NOR/NAND flash, 16-bit SDRAM, and asynchronous peripherals. It also includes 128KB of on-chip SRAM, 8KB vector RAM, and 64KB ROM. These interfaces are electrically and logically isolated, enabling concurrent access without arbitration delay - critical for real-time audio+network applications.

Is the AM1802EZWTD3 pin-compatible with other AM18xx devices?

No, the AM1802EZWTD3 is not pin-compatible with other AM18xx variants such as AM1806 or AM1808. While all share the same 361-ball ZWT package footprint, pin functions differ significantly - for example, AM1806 adds PCIe and SATA signals not present on AM1802EZWTD3, and AM1808 includes additional McASP serializers and security accelerators. Board-level reuse requires full schematic and layout validation per device datasheet.

What is the role of the McASP peripheral in the AM1802EZWTD3?

The McASP (Multichannel Audio Serial Port) in the AM1802EZWTD3 provides 16 configurable serializers with independent transmit/receive clocks, FIFO buffers, and protocol support for TDM, I²S, and DIT (S/PDIF). It enables direct digital audio I/O for applications like medical monitor audio alerts or POS terminal voice feedback - without requiring external audio codecs. The AM1802EZWTD3's McASP is fully DMA-mapped via EDMA3, allowing zero-CPU-overhead streaming at sample rates up to 192 kHz.