Texas Instruments TM4C1237E6PMIR

Overview

TM4C1237E6PMIR from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 256 KB Flash, 32 KB SRAM, and integrated analog peripherals including 12-bit ADC (up to 1MSPS), two 16-bit PWM modules, and four UARTs. It operates at up to 80 MHz, supports hibernation mode with RTC and battery-backed memory, and targets embedded control in industrial automation, motor drives, and sensor hubs.

For engineers reviewing the TM4C1237E6PMIR datasheet, TM4C1237E6PMIR pinout, TM4C1237E6PMIR application, or TM4C1237E6PMIR equivalent, key selection criteria include its 80 MHz Cortex-M4F core with FPU, 12-bit 1MSPS ADC with hardware averaging, hibernation power management down to 1.7 µA, and full JTAG/SWD debug support - all in a 64-pin LQFP package.

Technical Context

The TM4C1237E6PMIR integrates a single-core ARM Cortex-M4F processor with floating-point unit and 16-stage pipeline, executing Thumb-2 instructions at up to 80 MHz. It features a tightly coupled memory subsystem with 256 KB on-chip Flash (with error correction), 32 KB SRAM, and 2 KB EEPROM.

Peripherals include dual 16-bit general-purpose timers with PWM capability, four UARTs (one with ISO 7816 and SIR support), two I²C modules, two SPI controllers, and a 12-channel 12-bit ADC with four independent sample sequencers and hardware oversampling up to 64x.

Key Specifications

Pinout & Package

TM4C1237E6PMIR is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS358E datasheet Rev E, June 2014.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C1237E6PMIR, TM4C123GH6PM omits hibernation features but offers identical performance in active mode, while STM32F407VGT6 provides greater compute headroom at the expense of integrated low-power retention - making TM4C1237E6PMIR uniquely balanced for battery-constrained, real-time embedded control.

Availability

TM4C1237E6PMIR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, programmable logic controllers, and USB human interface devices requiring stable component supply and long-term manufacturability.

Supply support for TM4C1237E6PMIR 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 consumer markets since 1930.

The Tiva C Series - including TM4C1237E6PMIR - was designed specifically for cost-sensitive, real-time embedded applications demanding integrated analog, deterministic timing, and ultra-low-power hibernation without external components.

FAQ

What is the maximum operating frequency of the TM4C1237E6PMIR?

The TM4C1237E6PMIR operates at a maximum system clock frequency of 80 MHz, derived from its internal PLL driven by either the precision internal oscillator (PIOSC) or an external crystal. This frequency is sustained across the full industrial temperature range (–40°C to +105°C) and supports deterministic real-time execution of control loops and communication stacks without throttling.

Does the TM4C1237E6PMIR include a hardware floating-point unit?

Yes, the TM4C1237E6PMIR integrates a full IEEE 754-compliant single-precision floating-point unit (FPU) as part of its ARM Cortex-M4F core. This enables efficient execution of trigonometric, exponential, and filtering operations - critical for motor control algorithms and sensor fusion - without software emulation overhead or latency penalties.

What low-power modes does the TM4C1237E6PMIR support, and what is its lowest current draw?

The TM4C1237E6PMIR supports multiple low-power states including Sleep, Deep-Sleep, and Hibernate. In Hibernate mode with RTC and 256-byte battery-backed RAM active, it draws just 1.7 µA - verified per TI SPMS358E datasheet Section 7.3.7. This makes TM4C1237E6PMIR ideal for battery-powered applications requiring multi-year operation without recharge.

Is the TM4C1237E6PMIR pin-compatible with other Tiva C Series microcontrollers?

No, the TM4C1237E6PMIR is not pin-compatible with most other Tiva C Series parts due to differences in peripheral mapping and package-specific signal assignments. For example, its 64-pin LQFP layout differs from the 100-pin versions (e.g., TM4C123GH6PM) and lacks certain USB or CAN pins present in larger variants. Always verify pinout against SPMS358E Table 1-1 before board reuse.

Does the TM4C1237E6PMIR include on-chip EEPROM, and how is it accessed?

Yes, the TM4C1237E6PMIR includes 2 KB of on-chip EEPROM accessible via dedicated EEPROM controller registers (EE* family). It supports byte/word read/write, block erase, and wear-leveling through firmware - eliminating need for external EEPROM in data-logging or calibration storage applications. Access requires unlocking via specific key sequences per Section 8.2.4 of the datasheet.