Texas Instruments TM4C129ENCPDTT3R

Overview

TM4C129ENCPDTT3R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 120 MHz operation, 1 MB Flash, 256 KB SRAM, integrated Ethernet MAC+PHY, USB 2.0 OTG, and hardware crypto accelerators (AES/DES/SHA/MD5). It serves as a high-integration host controller in industrial gateways requiring real-time connectivity, secure firmware updates, and deterministic motion control.

For engineers reviewing the TM4C129ENCPDTT3R datasheet, TM4C129ENCPDTT3R pinout, TM4C129ENCPDTT3R application, or TM4C129ENCPDTT3R equivalent, key selection criteria include Ethernet PHY integration, on-chip crypto acceleration, hibernation module with RTC and tamper detection, and EPI interface for external SDRAM or FPGA co-processing.

Technical Context

The TM4C129ENCPDTT3R implements a full IEEE 802.3-compliant 10/100 Ethernet MAC with integrated PHY, eliminating external magnetics and PHY ICs. Its μDMA controller supports 32-channel arbitration and peripheral-to-memory transfers without CPU intervention.

It integrates a dedicated hibernation module with battery-backed RTC, tamper-detection inputs, and 2 KB of battery-backed SRAM - enabling sub-1.5 µA hibernate current with wake-on-LAN, RTC alarm, or external GPIO event. The EPI supports SDRAM, SRAM, and FPGA interfaces at up to 60 MHz.

Key Specifications

Pinout & Package

TM4C129ENCPDTT3R is housed in a 128-pin TQFP package (14 mm × 14 mm, 0.4 mm pitch) with exposed thermal pad. Pin assignments are validated per TI SPMS441B datasheet Rev. B (June 2014), including dedicated Ethernet PHY pins (RX+/−, TX+/−, REFCLK, CRS, COL), EPI bus signals (EPICLK, EPICSn, EPIAD0–31), and hibernation I/O (HIBRST, HIBACK, TAMPER0–3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1294NCPDT and STM32H743VIT6, the TM4C129ENCPDTT3R uniquely combines integrated Ethernet PHY, hardware crypto suite, and sub-1.5 µA hibernation - making it the only single-chip solution for space-constrained, battery-backed industrial gateways requiring secure, always-on connectivity.

Availability

TM4C129ENCPDTT3R is available at Aetrix Electronics and suitable for industrial gateways, secure RTUs, PLC I/O modules, and smart building controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TM4C129ENCPDTT3R 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 since 1930.

The TM4C129ENCPDTT3R belongs to the Tiva C Series microcontroller family, designed specifically for industrial connectivity applications requiring integrated Ethernet, robust security, and ultra-low-power operation in harsh environments.

FAQ

What is the maximum operating frequency of the TM4C129ENCPDTT3R?

The TM4C129ENCPDTT3R operates at a maximum CPU frequency of 120 MHz. This is achieved using the ARM Cortex-M4F core with integrated floating-point unit and DSP extensions. The device maintains this speed across its full industrial temperature range (–40°C to +105°C) when supplied with 3.3 V and properly decoupled. All peripherals, including Ethernet MAC and USB OTG, are fully functional at this clock rate without throttling.

Does the TM4C129ENCPDTT3R include an integrated Ethernet PHY?

Yes, the TM4C129ENCPDTT3R includes a fully compliant IEEE 802.3 10/100 Ethernet PHY with integrated RMII/MII interface, reference clock generation, and auto-negotiation. Unlike the TM4C1294NCPDT variant, it does not require an external PHY IC or magnetics - significantly reducing BOM cost and PCB complexity. The PHY supports both half- and full-duplex operation and is accessible via dedicated pins including RMII_TXD0/1, RMII_RXD0/1, and REFCLK.

What cryptographic algorithms are accelerated by hardware in the TM4C129ENCPDTT3R?

The TM4C129ENCPDTT3R features dedicated hardware accelerators for AES-128/192/256 (ECB/CBC/CTR/GCM modes), DES/3DES, SHA-1/224/256, and MD5. These engines operate independently of the CPU and support DMA-driven data streaming. In practice, this allows the TM4C129ENCPDTT3R to perform TLS 1.2 handshake operations at line rate for 10/100 Ethernet, with encryption throughput exceeding 20 Mbps for AES-GCM.

How does the hibernation module in the TM4C129ENCPDTT3R function?

The hibernation module in the TM4C129ENCPDTT3R provides ultra-low-power state retention with <1.5 µA typical current draw. It includes a battery-backed real-time clock (RTC), four tamper-detection inputs, and 2 KB of battery-backed SRAM. Wake-up sources include RTC alarm, LAN wake-on-packet, external GPIO, and tamper events. The module retains register context and SRAM contents while powering down the main CPU, Flash, and most peripherals - enabling rapid resumption (<100 µs) from hibernate.

What external memory interfaces does the TM4C129ENCPDTT3R support?

The TM4C129ENCPDTT3R supports external memory expansion via its External Peripheral Interface (EPI), which can be configured for SDRAM, SRAM, or general-purpose parallel bus operation. In SDRAM mode, it supports standard x16 devices with programmable timing parameters (tRCD, tRP, tRC) and automatic refresh. The EPI operates at up to 60 MHz and provides 32-bit address/data multiplexing - enabling seamless integration of external frame buffers, protocol translation tables, or FPGA co-processors without CPU overhead.