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Texas Instruments TM4C1231C3PMI7R
- Part No.:
- TM4C1231C3PMI7R
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
TM4C1231C3PMI7R.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,258
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Product details
Overview
TM4C1231C3PMI7R from Texas Instruments is an ARM Cortex-M4F-based microcontroller with 80 MHz operation, 32 KB Flash, 8 KB SRAM, and integrated USB 2.0 device controller; it supports real-time control in industrial sensor nodes and motor drive interfaces.
For engineers reviewing the TM4C1231C3PMI7R datasheet, TM4C1231C3PMI7R pinout, TM4C1231C3PMI7R application, or TM4C1231C3PMI7R equivalent, key selection criteria include USB device capability, 12-bit ADC resolution with hardware averaging, PWM generation with dead-band control, and support for TivaWare™ software stack in resource-constrained embedded designs.
Technical Context
The TM4C1231C3PMI7R implements a single-core ARM Cortex-M4F processor with FPU and 240-cycle integer multiply-accumulate (MAC) instruction support, enabling deterministic floating-point math for closed-loop control algorithms. It integrates a 12-channel μDMA controller to offload CPU bandwidth during peripheral-to-memory transfers.
System-level integration includes a programmable clock tree with PLL-based 80 MHz system clock, configurable GPIOs with slew-rate control and interrupt-on-change, and a 12-bit, 1-MSPS analog-to-digital converter with four independent sample sequencers and hardware oversampling up to 64×.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M4F @ 80 MHz - enables real-time signal processing with hardware FPU and DSP extensions |
| Flash Memory | 32 KB - sufficient for bootloader + application firmware with OTA update partitioning |
| SRAM | 8 KB - supports stack/heap allocation for RTOS tasks and sensor data buffering |
| ADC | 12-bit, 1-MSPS, 12-channel - delivers high-resolution analog sensing with hardware averaging for noise reduction |
| USB Interface | USB 2.0 Device only - supports HID, CDC, and MSC class implementations without external PHY |
| PWM Outputs | 8 PWM generator blocks, 16 outputs - provides independent duty-cycle and frequency control for multi-phase motor drives |
| GPIO Pins | 49 programmable I/O - includes 5V-tolerant inputs and slew-rate configurable outputs for mixed-voltage interfacing |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
TM4C1231C3PMI7R is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad for enhanced power dissipation in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital core (VDDC), analog (VDDA), and I/O (VDD) enable noise isolation and stable ADC reference |
| GND, GNDA, GNDC | Ground returns | Separate analog/digital/thermal ground pins reduce coupling and improve signal integrity |
| USB0VBUS, USB0ID, USB0DP, USB0DM | USB 2.0 interface | Full-speed USB device interface with internal transceiver; no external PHY required |
| PD0–PD7, PE0–PE5, PF0–PF4 | General-purpose I/O | Configurable as GPIO, UART, SSI, I²C, or timer outputs; PF0 supports NMI and reset functions |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | Synchronous serial interface | Hardware SPI master/slave with FIFO and DMA support for sensor or display communication |
| U0RX, U0TX, U1RX, U1TX | UART channels | Two independent UARTs with 16-byte FIFOs, auto-baud detection, and IrDA encoding |
| ADC0, ADC1, ..., ADC11 | Analog input channels | 12 dedicated ADC input pins mapped to internal 12-bit SAR converter with selectable reference sources |
| PH0–PH3 | PWM outputs | Four PWM output pins from Timer 5; support complementary pair generation with dead-band insertion |
Key Features
| Feature | Design Value |
|---|---|
| Floating-Point Unit (FPU) | Single-precision IEEE 754 compliant unit accelerates trigonometric, filter, and PID computations without software emulation overhead |
| μDMA Controller | 32-channel configurable controller eliminates CPU polling for ADC sampling, UART RX/TX, and SSI transfers - reduces ISR latency by >90% |
| Hardware Averaging | ADC supports 2×–64× hardware oversampling and decimation - improves effective resolution to 14 bits at reduced sampling rate |
| ROM-Based Bootloader | Pre-programmed ROM bootloader enables UART/USB/I²C firmware updates without external programmer - simplifies field maintenance |
| Peripheral Integration | Includes 8 timers, 2 UARTs, 2 SSI, 2 I²C, 1 USB, 12-bit ADC, and 16 PWM outputs - reduces BOM count and PCB area vs discrete solutions |
| GPIO Configuration Flexibility | Each pin supports multiple alternate functions with individual slew-rate, drive strength, and pull-up/down control - adapts to legacy or new interface requirements |
Applications
| Industrial Sensor Node | Smart Lighting Controller |
|---|---|
Use Scenario: Standalone environmental monitoring node collecting temperature, humidity, and CO₂ via analog and I²C sensors, transmitting data over USB to gateway. IC Role / Device Role / Timing Role: Central MCU managing sensor acquisition, local filtering, USB CDC virtual COM port communication, and low-power sleep scheduling. Use Value: Integrated 12-bit ADC with hardware averaging ensures accurate sensor readings; USB device mode enables plug-and-play host connection without external transceiver. | Use Scenario: LED driver board controlling color-mixing and dimming across RGBW strings using PWM and current feedback. IC Role / Device Role / Timing Role: Real-time PWM generator with dead-band control and current-sense ADC interfacing for constant-current regulation. Use Value: 16-channel PWM with independent frequency/duty registers enables per-string tuning; 1-MSPS ADC captures fast current transients for closed-loop correction. |
| Motor Drive Interface | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Brushless DC motor control module accepting analog speed command and providing Hall-effect commutation timing and fault reporting. IC Role / Device Role / Timing Role: Motion controller executing trapezoidal commutation logic, generating six-step PWM, and monitoring overcurrent via ADC. Use Value: Eight PWM generator blocks deliver precise phase timing; GPIOs with interrupt-on-change detect Hall sensor edges with sub-microsecond latency. | Use Scenario: DIN-rail mounted I/O expansion module converting 24 VDC industrial signals to digital logic levels and driving relay outputs. IC Role / Device Role / Timing Role: Isolation-aware signal conditioner and protocol translator handling discrete input debouncing, output latching, and Modbus RTU over UART. Use Value: Configurable GPIO slew rate and 5V-tolerant inputs simplify interface to optocoupled inputs; ROM bootloader enables remote firmware updates over RS-485. |
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 | Supports larger firmware images and complex protocols (e.g., full TCP/IP stack); not suitable where cost or footprint must be minimized | Select TM4C123GH6PM when application requires >32 KB code space or extended RAM for network buffers |
| STM32F401RE | ARM Cortex-M4F @ 84 MHz, 512 KB Flash, 96 KB SRAM; lacks native USB device PHY and integrated ROM bootloader | Requires external USB transceiver and separate bootloader implementation; better suited for high-memory applications with Ethernet or SDIO | Select STM32F401RE when higher memory density and peripheral count outweigh USB integration benefits |
Compared with TM4C123GH6PM and STM32F401RE, the TM4C1231C3PMI7R offers optimal balance of USB device integration, compact memory footprint, and industrial temperature rating - ideal for cost-sensitive, USB-connected edge devices where firmware size stays under 32 KB.
Availability
TM4C1231C3PMI7R is available at Aetrix Electronics and suitable for industrial sensor nodes, smart lighting controllers, motor drive interfaces, and PLC I/O modules requiring stable component supply and long-term manufacturability.
Supply support for TM4C1231C3PMI7R 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TM4C123x series targets cost-effective, USB-enabled microcontroller applications in industrial automation and IoT edge devices, emphasizing integrated peripherals, robust firmware ecosystem (TivaWare™), and qualification across extended temperature ranges.
FAQ
What is the maximum operating frequency of the TM4C1231C3PMI7R?
The TM4C1231C3PMI7R operates at a maximum system clock frequency of 80 MHz, achieved via its on-chip PLL that accepts a 4–25 MHz crystal or external clock source. This frequency is fully supported across the entire operating temperature range (–40°C to +85°C) and enables deterministic execution of real-time control loops and USB frame timing without overclocking.
Does the TM4C1231C3PMI7R include a built-in USB transceiver?
Yes, the TM4C1231C3PMI7R integrates a full-speed USB 2.0 device transceiver compliant with USB Specification Revision 2.0. It supports USB device modes including CDC, HID, and MSC classes directly from silicon - no external PHY or level-shifting components are required for standard USB cable connections.
What ADC capabilities does the TM4C1231C3PMI7R provide?
The TM4C1231C3PMI7R features a 12-bit successive approximation register (SAR) ADC with up to 1-MSPS sampling rate, 12 input channels, four independent sample sequencers, and hardware oversampling up to 64×. It supports selectable voltage references (internal 3.3 V or external), differential input mode, and internal temperature sensor readout - all accessible without external components.
Is there a ROM-based bootloader in the TM4C1231C3PMI7R?
Yes, the TM4C1231C3PMI7R includes a factory-programmed ROM bootloader supporting firmware updates over UART, USB, and I²C interfaces. This eliminates the need for JTAG/SWD debug hardware during field deployment and enables secure, authenticated firmware upgrades using TI's proprietary In-Application Programming (IAP) framework.
What development tools are officially supported for the TM4C1231C3PMI7R?
Texas Instruments officially supports the TM4C1231C3PMI7R with Code Composer Studio (CCS) IDE, IAR Embedded Workbench, and GCC-based toolchains. Hardware debugging is enabled via SWD/JTAG using TI's XDS110 debug probe or compatible CMSIS-DAP adapters, and TivaWare™ C Series software provides peripheral drivers, USB stacks, and example projects validated for this exact part number.
TM4C1231C3PMI7R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Tiva™ C
- Packaging:
- Tape & Reel (TR)
- 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:
TM4C1231C3PMI7R FAQ
1.How can I place an order for TM4C1231C3PMI7R through Aetrix?
Please submit a Request for Quotation (RFQ) for TM4C1231C3PMI7R 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 TM4C1231C3PMI7R reliable?
The price and inventory of TM4C1231C3PMI7R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TM4C1231C3PMI7R is usually 5 days.
3.What payment methods are accepted for TM4C1231C3PMI7R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TM4C1231C3PMI7R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TM4C1231C3PMI7R?
TM4C1231C3PMI7R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TM4C1231C3PMI7R 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 TM4C1231C3PMI7R?
For technical support, including TM4C1231C3PMI7R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TM4C1231C3PMI7R requirements.
6.How does Aetrix verify that TM4C1231C3PMI7R is sourced from the original manufacturer or authorized distributors?
All TM4C1231C3PMI7R 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 TM4C1231C3PMI7R meets industry standards.
7.What is the process for return or replacement of TM4C1231C3PMI7R?
All TM4C1231C3PMI7R units undergo pre-shipment inspection (PSI). If there is an issue with TM4C1231C3PMI7R, 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 TM4C1231C3PMI7R part is unused and in its original packaging.
Return procedure for TM4C1231C3PMI7R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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