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Texas Instruments TM4C1231C3PMIR
- Part No.:
- TM4C1231C3PMIR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
TM4C1231C3PMIR.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
TM4C1231C3PMIR 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 with 12 channels - deployed in industrial sensor nodes requiring real-time control and local data preprocessing.
For engineers reviewing the TM4C1231C3PMIR datasheet, TM4C1231C3PMIR pinout, TM4C1231C3PMIR application, or TM4C1231C3PMIR equivalent, key selection criteria include its USB device capability, hibernation module with RTC and battery-backed memory, 32-pin QFN package, and support for TivaWare™ software stack in resource-constrained embedded designs.
Technical Context
The TM4C1231C3PMIR integrates a single-core ARM Cortex-M4F processor with hardware floating-point unit (FPU), enabling deterministic execution of signal-processing routines. It supports Thumb-2 instruction set and includes NVIC with 64 interrupt lines, SysTick timer, and MPU for memory protection.
System-level integration includes a hibernation module with dedicated VBAT supply, real-time clock, and 2 KB of battery-backed SRAM; plus μDMA controller supporting up to 32 channel assignments across peripherals including UARTs, ADC, and timers - all operating under a configurable clock tree with PLL and multiple low-power modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M4F @ 80 MHz - delivers deterministic floating-point math for motor control or sensor fusion without external coprocessor. |
| Memory | 32 KB Flash + 8 KB SRAM - sufficient for standalone firmware with USB stack and basic RTOS task scheduling. |
| ADC | 12-bit, 1 MSPS, 12-channel - enables simultaneous sampling of analog sensors (e.g., temperature, pressure) with hardware averaging. |
| USB Interface | USB 2.0 Device-only controller - supports HID, CDC, and MSC class implementations without external PHY. |
| Hibernation Module | RTC + 2 KB battery-backed SRAM + VBAT monitoring - maintains timekeeping and critical state during main power loss. |
| Package | 32-pin QFN (5 × 5 mm, 0.5 mm pitch) - compact footprint suitable for space-limited industrial modules and IoT edge nodes. |
| Operating Temp | –40°C to +105°C - qualified for extended-temperature industrial environments including factory automation and building controls. |
Pinout & Package
TM4C1231C3PMIR is housed in a 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS333E datasheet Rev E (June 2014), Table 1-1 and Section 1.4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital logic (VDD), analog (VDDA), and core (VDDC) - enable noise isolation and independent voltage regulation. |
| GND, GNDA | Ground references | Separate analog/digital ground pins reduce coupling between sensitive ADC paths and switching logic. |
| USB0DM / USB0DP | USB differential pair | Integrated transceiver supports full-speed (12 Mbps) USB device operation without external components. |
| PD0 / PD1 | UART0 I/O | Default UART0 pins mapped to Port D - usable for debug console or host communication with configurable baud rate. |
| PF0 / PF4 | NMI / USER SW2 | Non-maskable interrupt input and user-configurable button input - used for emergency reset or wake-from-hibernate trigger. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation with RTC | Enables ultra-low-power sleep (<1 µA) while maintaining accurate time and retaining 2 KB of state in battery-backed SRAM. |
| USB Device Controller | Reduces BOM cost and PCB area by eliminating external USB PHY; supports CDC ACM and HID class drivers out-of-box. |
| μDMA Engine | Offloads CPU from peripheral data movement - supports scatter-gather transfers for ADC-to-memory or UART-to-buffer operations. |
| Integrated Analog | 12-bit ADC with hardware sample averaging and internal temperature sensor - eliminates need for external signal conditioning in basic monitoring applications. |
| TivaWare™ Support | Production-ready driver library, USB stack, and FreeRTOS port - accelerates firmware development and reduces qualification effort. |
Applications
| Industrial Sensor Node | USB Human Interface Device |
|---|---|
Use Scenario: Compact environmental monitor collecting temperature, humidity, and vibration data at 10 Hz with local threshold detection. IC Role / Device Role / Timing Role: Central controller executing sensor polling, filtering, and USB report generation; RTC provides timestamping. Use Value: Integrated ADC, hibernation, and USB eliminate discrete support ICs - reducing bill-of-materials and board area by >30% vs. MCU+PHY+RTC solution. |
Use Scenario: Programmable mechanical keyboard with per-key RGB lighting and macro support. IC Role / Device Role / Timing Role: USB HID device handling key matrix scanning, debouncing, and report packet assembly; SysTick ensures consistent polling interval. Use Value: On-chip USB controller and 80 MHz M4F core enable real-time response (<5 ms latency) and dynamic lighting effects without external microcontroller. |
| Smart Building Actuator | Portable Diagnostic Tool |
Use Scenario: HVAC damper controller receiving Modbus RTU commands over RS-485 and driving stepper motor via GPIO PWM. IC Role / Device Role / Timing Role: Protocol translator and motion sequencer; GPTM modules generate precise 1–20 kHz PWM for motor current control. Use Value: Dual UARTs allow concurrent RS-485 command reception and debug logging; hibernation preserves configuration during brownout events. |
Use Scenario: Handheld test instrument measuring analog signals and exporting logs via USB mass storage. IC Role / Device Role / Timing Role: Data acquisition engine with ADC oversampling and USB MSC endpoint - stores CSV files directly to host PC. Use Value: 12-bit ADC with hardware averaging achieves effective 13.5 ENOB; integrated USB avoids external bridge IC and associated firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C1230C3PMIR | Same package and core, but with 64 KB Flash and no USB controller - lacks integrated USB PHY and device stack hardware. | Suitable for non-USB applications needing larger code space; requires external interface (e.g., UART-to-USB bridge) for host connectivity. | Select when USB is unnecessary and firmware size exceeds 32 KB - retains identical pinout and peripheral set except USB block. |
| STM32F072CBT6 | ARM Cortex-M0+, 48 MHz, 128 KB Flash, USB 2.0 FS device, but no hibernation module or battery-backed RAM. | Better suited for cost-sensitive USB peripherals without long-term offline operation; lacks RTC retention during main power loss. | Choose for higher Flash capacity and broader ecosystem tooling - only if hibernation and VBAT support are not required. |
Compared with TM4C1230C3PMIR and STM32F072CBT6, the TM4C1231C3PMIR uniquely balances USB integration, hibernation capability, and industrial temperature range in a 32-pin QFN - making it optimal for battery-backed field devices needing host connectivity and zero-power timekeeping.
Availability
TM4C1231C3PMIR is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human interface devices, smart building actuators, and portable diagnostic tools requiring stable component supply across multi-year production cycles.
Supply support for TM4C1231C3PMIR 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, specializing in analog, embedded processing, and wireless technologies since 1930.
The TM4C1231C3PMIR belongs to TI's Tiva C Series - designed specifically for cost-sensitive, low-power industrial and consumer applications requiring USB connectivity, analog integration, and robust real-time performance.
FAQ
What is the maximum operating frequency of the TM4C1231C3PMIR?
The TM4C1231C3PMIR operates at a maximum system clock frequency of 80 MHz, achieved using its internal PLL with reference to the main oscillator or precision internal oscillator. This speed is fully supported across the entire industrial temperature range (–40°C to +105°C) and enables real-time execution of control loops and USB packet handling without timing violations in the TM4C1231C3PMIR.
Does the TM4C1231C3PMIR include USB functionality, and what type is supported?
Yes, the TM4C1231C3PMIR integrates a full-speed USB 2.0 device controller compliant with USB specification revision 2.0. It supports standard device classes including CDC ACM (virtual COM port), HID (keyboard/mouse), and MSC (mass storage) - all implemented in firmware using TI's TivaWare™ USB stack without requiring external PHY components.
What low-power features does the TM4C1231C3PMIR offer for battery-operated applications?
The TM4C1231C3PMIR includes a dedicated hibernation module with RTC, battery-backed 2 KB SRAM, and VBAT monitoring - enabling operation below 1 µA while preserving time and critical data. It supports multiple sleep modes (sleep, deep-sleep, hibernate) controlled via the SCB and HIB registers, and wake-up sources include GPIO, RTC match, and external interrupts - essential for long-life deployments of the TM4C1231C3PMIR.
Is the TM4C1231C3PMIR pin-compatible with other Tiva C Series microcontrollers?
The TM4C1231C3PMIR uses a 32-pin QFN package shared with several other Tiva C Series variants, including TM4C1230C3PMIR and TM4C123GH6PM, but pin compatibility is not guaranteed across all peripherals. For example, USB0DM/USB0DP pins are unique to USB-capable variants, and ADC channel mappings differ. Always verify pin function tables in the SPMS333E datasheet before substituting the TM4C1231C3PMIR.
What development resources are available for the TM4C1231C3PMIR?
Texas Instruments provides the complete TivaWare™ software suite - including peripheral drivers, USB stack, FreeRTOS port, and example projects - alongside evaluation boards like the TM4C123G LaunchPad. TI also publishes the official SPMS333E datasheet, technical reference manual, and application notes covering USB design, low-power implementation, and ADC calibration - all directly applicable to the TM4C1231C3PMIR.
TM4C1231C3PMIR 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:
TM4C1231C3PMIR FAQ
1.How can I place an order for TM4C1231C3PMIR through Aetrix?
Please submit a Request for Quotation (RFQ) for TM4C1231C3PMIR 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 TM4C1231C3PMIR reliable?
The price and inventory of TM4C1231C3PMIR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TM4C1231C3PMIR is usually 5 days.
3.What payment methods are accepted for TM4C1231C3PMIR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TM4C1231C3PMIR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TM4C1231C3PMIR?
TM4C1231C3PMIR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TM4C1231C3PMIR 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 TM4C1231C3PMIR?
For technical support, including TM4C1231C3PMIR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TM4C1231C3PMIR requirements.
6.How does Aetrix verify that TM4C1231C3PMIR is sourced from the original manufacturer or authorized distributors?
All TM4C1231C3PMIR 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 TM4C1231C3PMIR meets industry standards.
7.What is the process for return or replacement of TM4C1231C3PMIR?
All TM4C1231C3PMIR units undergo pre-shipment inspection (PSI). If there is an issue with TM4C1231C3PMIR, 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 TM4C1231C3PMIR part is unused and in its original packaging.
Return procedure for TM4C1231C3PMIR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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