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Texas Instruments TM4C1231C3PMI
- Part No.:
- TM4C1231C3PMI
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
TM4C1231C3PMI.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
TM4C1231C3PM from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 32 KB Flash, 8 KB SRAM, integrated USB 2.0 device controller, and 12-bit ADC for embedded control in industrial sensors and motor drives.
For engineers reviewing the TM4C1231C3PM datasheet, TM4C1231C3PM pinout, TM4C1231C3PM application, or TM4C1231C3PM equivalent, key selection criteria include its 80 MHz CPU clock, USB device capability, hibernation module with RTC, 12-bit ADC with hardware averaging, and support for TivaWare™ software stack.
Technical Context
The TM4C1231C3PM integrates a single-core ARM Cortex-M4F processor with floating-point unit (FPU), memory protection unit (MPU), and nested vectored interrupt controller (NVIC). It supports Thumb-2 instruction set and delivers deterministic real-time performance with low-latency interrupt handling.
System-level integration includes a hibernation module with battery-backed RTC and memory, μDMA controller supporting 32 channels, and peripheral-specific clock gating. All analog and digital peripherals-including GPIO, UART, SPI, I²C, PWM, and watchdog timers-are accessible via APB/AHB bus matrix with configurable power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M4F @ 80 MHz - enables real-time signal processing with hardware FPU for sensor fusion or motor control math. |
| Flash Memory | 32 KB - sufficient for bootloader + application firmware with room for field updates in space-constrained designs. |
| SRAM | 8 KB - supports moderate stack/heap usage for RTOS or bare-metal applications with multiple peripheral buffers. |
| ADC Resolution | 12-bit with hardware averaging - improves effective resolution to ~13.5 bits for precision analog sensing without software oversampling. |
| USB Interface | USB 2.0 Device only - enables HID, CDC, or mass storage class implementations without external PHY. |
| Hibernation Mode | RTC + battery-backed RAM - maintains timekeeping and critical state during <1 µA sleep, ideal for battery-powered remote nodes. |
| Package | 64-pin LQFP (10 × 10 mm) - standard surface-mount footprint compatible with automated assembly and thermal management. |
Pinout & Package
TM4C1231C3PM uses a 64-pin LQFP package with exposed thermal pad. Pin functions are defined per TI SPMS333E datasheet revision E (June 2014), including dedicated JTAG/SWD debug pins, USB D+/D−, VDD/VSS rails, and multiplexed GPIO/peripheral signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Differentiated analog/digital/core supplies enable noise isolation for ADC accuracy and stable core operation. |
| USB0DP / USB0DM | USB differential data pair | Integrated transceiver eliminates need for external USB PHY; requires 1.5 kΩ pull-up on DP for device enumeration. |
| PD0 / PD1 | UART0 RX/TX | Default UART interface for console logging or host communication; supports up to 3 Mbps with fractional baud rate generator. |
| PF0–PF4 | GPIO / NMI / SW2 / SW1 / TCK | Multi-function pins include user switch inputs and JTAG test clock; PF0 defaults to NMI but can be reconfigured as GPIO after reset. |
| HIB, RTCCLK | Hibernation module interface | HIB pin enables deep-sleep entry; RTCCLK accepts external 32.768 kHz crystal or internal oscillator for timekeeping during hibernation. |
Key Features
| Feature | Design Value |
|---|---|
| Floating-Point Unit (FPU) | Hardware-accelerated single-precision math reduces cycle count for PID loops, FFTs, or sensor calibration-no software emulation overhead. |
| μDMA Controller | 32-channel controller offloads CPU from peripheral-to-memory transfers, enabling concurrent ADC sampling and UART streaming without interrupt latency. |
| Hibernation Module | Retains RTC time and 256 bytes of battery-backed RAM while drawing <1 µA, eliminating external RTC and backup memory in portable systems. |
| Peripheral Integration | Includes 6 UARTs, 4 SPI, 4 I²C, 2 QEI, 8 PWM generators, and 2 watchdog timers-reduces BOM count and PCB layer count in motion control designs. |
| TivaWare™ Support | TI-provided driver library with HAL APIs, USB stack, and example projects accelerates development and ensures register-level correctness across silicon revisions. |
Applications
| Industrial Sensor Node | Smart Thermostat |
|---|---|
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ at 1-minute intervals with wireless upload. IC Role / Device Role / Timing Role: Main system controller managing sensor interfaces, hibernation scheduling, USB/UART diagnostics, and low-power RTC wake-up. Use Value: Hibernation mode draws <1 µA between samples; integrated 12-bit ADC with hardware averaging achieves ±0.5°C temperature accuracy without external signal conditioning. | Use Scenario: Residential HVAC controller with LCD display, touch buttons, and Wi-Fi connectivity via UART bridge. IC Role / Device Role / Timing Role: Real-time system manager coordinating user input, display refresh, temperature regulation via PWM fan control, and communication protocol translation. Use Value: 80 MHz Cortex-M4F executes PID loop every 10 ms; built-in USB device allows field firmware updates via PC without requiring separate programming hardware. |
| Motor Control Starter Kit | Programmable Logic Relay |
Use Scenario: Entry-level BLDC motor evaluation board with current sensing, gate drive, and encoder feedback. IC Role / Device Role / Timing Role: Motion controller executing commutation logic, reading quadrature encoder (QEI), and generating synchronized PWM waveforms with dead-time insertion. Use Value: Dual 16-bit PWM generators with fault protection pins enable safe three-phase inverter control; QEI interface directly decodes encoder pulses without CPU intervention. | Use Scenario: DIN-rail mounted industrial relay replacing electromechanical units with programmable timing, counting, and logic functions. IC Role / Device Role / Timing Role: Deterministic logic engine implementing ladder logic scan cycles, timer/counter functions, and discrete I/O monitoring with precise 1 ms resolution. Use Value: Nested Vectored Interrupt Controller (NVIC) guarantees sub-1 µs interrupt response for emergency stop inputs; 32 KB Flash stores multiple logic configurations with versioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Higher Flash (256 KB) and SRAM (32 KB); same 80 MHz Cortex-M4F core and peripheral set; adds CAN controller. | Required for CAN-based industrial networks or larger firmware images; not drop-in due to different pinout and package (144-pin LQFP). | Select when CAN bus integration or >32 KB code size is needed; requires PCB redesign. |
| STM32F401CEU6 | ARM Cortex-M4F @ 84 MHz, 512 KB Flash, 96 KB SRAM; no integrated USB PHY; lacks hibernation module with battery-backed RTC. | Suitable for USB host or high-memory applications but requires external USB PHY and RTC for ultra-low-power timekeeping. | Choose for higher memory headroom and ST ecosystem tools; accept added BOM cost and complexity for USB/RTC functions. |
Compared with TM4C123GH6PM and STM32F401CEU6, the TM4C1231C3PM offers optimal balance of USB device capability, hibernation efficiency, and compact 64-pin footprint-ideal for cost-sensitive, battery-aware embedded controllers where CAN or large memory are unnecessary.
Availability
TM4C1231C3PM is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, motor control starter kits, and programmable logic relays requiring stable component supply and long-term manufacturability.
Supply support for TM4C1231C3PM 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 TM4C123x series was designed specifically for cost-effective, low-power, real-time embedded control-emphasizing integrated USB, hibernation, and analog peripherals to reduce system-level complexity in industrial and building automation.
FAQ
What is the maximum operating frequency of the TM4C1231C3PM?
The TM4C1231C3PM operates at a maximum CPU clock frequency of 80 MHz, derived from an internal PLL that accepts input from the main oscillator, precision internal oscillator, or external crystal. This frequency is fully supported across the full industrial temperature range (–40°C to +85°C) and enables deterministic real-time execution for control loops and communication stacks. The TM4C1231C3PM maintains this speed without derating under typical voltage and thermal conditions specified in the SPMS333E datasheet.
Does the TM4C1231C3PM include an integrated USB physical layer (PHY)?
Yes, the TM4C1231C3PM integrates a full-speed USB 2.0 device PHY with on-chip termination resistors and differential signaling drivers. It supports USB device classes including CDC, HID, and MSC without requiring an external transceiver. The USB0DP and USB0DM pins connect directly to the USB connector, with only a 1.5 kΩ pull-up resistor on DP needed for enumeration. This integration simplifies layout and reduces BOM cost compared to microcontrollers requiring external PHYs.
How much battery-backed memory does the TM4C1231C3PM provide in hibernation mode?
The TM4C1231C3PM provides 256 bytes of battery-backed RAM within its hibernation module, retained during deep-sleep states powered by a coin-cell or supercapacitor. This memory preserves critical variables such as calibration coefficients, event counters, or RTC alarm settings while consuming less than 1 µA. The TM4C1231C3PM also includes a dedicated 32-bit real-time counter and calendar registers, all maintained independently of the main power domain.
Can the TM4C1231C3PM execute floating-point operations in hardware?
Yes, the TM4C1231C3PM contains a single-precision IEEE 754-compliant Floating-Point Unit (FPU) tightly coupled to its ARM Cortex-M4F core. This allows hardware acceleration of addition, multiplication, division, square root, and trigonometric functions without software library overhead. Applications such as motor control PID tuning, sensor fusion algorithms, or FFT-based vibration analysis benefit directly from the TM4C1231C3PM's FPU, reducing execution time and improving determinism.
What debug interface does the TM4C1231C3PM support?
The TM4C1231C3PM supports both JTAG and 2-wire Serial Wire Debug (SWD) interfaces using dedicated pins (TCK, TMS, TDI, TDO, and nTRST for JTAG; SWDIO and SWCLK for SWD). These interfaces enable full-featured debugging-including breakpoints, watchpoints, memory inspection, and real-time trace-with TI's Code Composer Studio or third-party tools like Segger J-Link. The TM4C1231C3PM's debug architecture complies with ARM CoreSight standards and supports vector catch and fault analysis.
TM4C1231C3PMI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Tiva™ C
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, WDT
- Number of I/O:
- 43
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.08V ~ 3.63V
- Data Converters:
- A/D 12x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
TM4C1231C3PMI FAQ
1.How can I place an order for TM4C1231C3PMI through Aetrix?
Please submit a Request for Quotation (RFQ) for TM4C1231C3PMI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TM4C1231C3PMI reliable?
The price and inventory of TM4C1231C3PMI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TM4C1231C3PMI is usually 5 days.
3.What payment methods are accepted for TM4C1231C3PMI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TM4C1231C3PMI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TM4C1231C3PMI?
TM4C1231C3PMI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TM4C1231C3PMI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TM4C1231C3PMI?
For technical support, including TM4C1231C3PMI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TM4C1231C3PMI requirements.
6.How does Aetrix verify that TM4C1231C3PMI is sourced from the original manufacturer or authorized distributors?
All TM4C1231C3PMI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TM4C1231C3PMI meets industry standards.
7.What is the process for return or replacement of TM4C1231C3PMI?
All TM4C1231C3PMI units undergo pre-shipment inspection (PSI). If there is an issue with TM4C1231C3PMI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TM4C1231C3PMI part is unused and in its original packaging.
Return procedure for TM4C1231C3PMI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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