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Texas Instruments RM44L920APZT
- Part No.:
- RM44L920APZT
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
RM44L920APZT.pdf
- Description:
- IC MCU 16/32BIT 1MB FLSH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,170
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Product details
Overview
RM44L920APZT from Texas Instruments is a safety-certifiable 32-bit ARM Cortex-R4F microcontroller designed for IEC 61508 SIL-3 industrial control systems. It features dual lockstep CPUs, 1MB flash with ECC, 128KB RAM with ECC, 180-MHz operation, and integrated functional safety peripherals including BIST, ESM, and voltage/clock monitoring - deployed in safe PLCs and turbine controllers.
For engineers reviewing the RM44L920APZT datasheet, RM44L920APZT pinout, RM44L920APZT application, or RM44L920APZT equivalent, key selection criteria include dual-CPU lockstep integrity, 3× CAN 2.0B interfaces with 64 mailboxes each, N2HET timing coprocessor support (32+18 channels), ePWM/eCAP/eQEP real-time control peripherals, and 100-pin LQFP packaging with 45 GPIOs (9 interrupt-capable).
Technical Context
The RM44L920APZT implements a dual-core lockstep architecture where both Cortex-R4F CPUs execute identical instructions and compare results cycle-by-cycle, with error signaling via dedicated nERROR pin. Its memory subsystem includes ECC-protected 1MB flash and 128KB SRAM, plus 64KB emulated EEPROM with ECC - all validated by on-chip BIST during startup and runtime.
Real-time control is enabled by two N2HET modules (N2HET1: 32 channels; N2HET2: 18 channels), each with 160-word parity-protected instruction RAM and hardware angle generator, plus seven ePWM modules supporting deadband generation and trip-zone protection synchronized to dual 12-bit MibADCs (24+16 total inputs, 64-word parity buffers each).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-R4F, 1.66 DMIPS/MHz, up to 180 MHz → delivers 298 DMIPS deterministic performance for safety-critical real-time tasks |
| Flash Memory | 1024 KB with ECC → ensures bit-error correction and double-bit error detection for firmware integrity in harsh environments |
| RAM | 128 KB SRAM with ECC → maintains data reliability during transient faults without software intervention |
| Communication Interfaces | 3× DCAN (CAN 2.0A/B, 1 Mbps, 64 mailboxes each), 2× SCI (1 with LIN 2.1), 3× MibSPI, 1× I2C → supports distributed control networks in industrial automation |
| Analog Peripherals | 2× 12-bit MibADC (24+16 channels, 64-word parity buffers each) → enables high-fidelity sensor acquisition for motor position, temperature, and current feedback |
| Timing Peripherals | 7× ePWM (14 outputs), 6× eCAP, 2× eQEP, 2× N2HET (32+18 channels) → provides deterministic pulse generation, encoder interface, and programmable timing for servo drives and power converters |
| Safety Features | Dual lockstep CPUs, CPU/RAM BIST, ESM with nERROR pin, voltage/clock monitors, FMPLL slip detector → meets IEC 61508 SIL-3 diagnostic coverage requirements |
Pinout & Package
RM44L920APZT is housed in a 100-pin LQFP (PZ) package measuring 14.0 mm × 14.0 mm, RoHS-compliant and green-qualified. The package supports 45 general-purpose I/O pins (9 with interrupt capability), 3× CAN transceiver interfaces, dual ADC reference inputs (ADREFHI/ADREFLO), and dedicated debug pins (JTAG/CoreSight).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nPORRST | Power-on Reset Input | Active-low asynchronous reset asserted at power-up; disables I/O buffers until release - critical for predictable boot initialization |
| nRST | Warm Reset Input | Active-low synchronous reset triggered by external controller or watchdog timeout - preserves power domain state during recovery |
| nERROR | Error Signaling Output | Open-drain fault indicator driven low by ESM on detected CPU, memory, or clock failure - enables system-level fail-safe shutdown |
| ECLK | External Clock Monitor Output | Programmable frequency-divided copy of VCLK - used externally to verify real-time clock domain health during safety validation |
| GIOA[0]–GIOA[7] | General-Purpose I/O Bank A | 8-pin group configurable as input/output/interrupt source; multiplexed with INT[0:7], EXTCLKIN, EPWM1A, N2HET1_PIN_nDIS - supports flexible peripheral routing |
| AD1IN[0]–AD1IN[23] | MibADC1 Analog Inputs | 24-channel single-ended or differential analog input bank with shared 16-channel overlap with MibADC2 - enables synchronized multi-sensor sampling |
| CAN1RX / CAN1TX | Controller Area Network Channel 1 | Differential receive/transmit pair compliant with ISO 11898-1; supports 1 Mbps operation and message filtering across 64 mailboxes |
Key Features
| Feature | Design Value |
|---|---|
| Dual Lockstep Cortex-R4F CPUs | Hardware-enforced instruction-level redundancy with cycle-accurate result comparison and automatic fault escalation via ESM |
| ECC-Protected Memory Subsystem | 1MB flash + 128KB RAM + 64KB emulated EEPROM all protected by single-bit correction/double-bit detection - eliminates silent data corruption |
| N2HET Timing Coprocessors | Two independent high-end timers (32+18 channels) with 160-word parity RAM and hardware angle generator - offloads complex PWM, capture, and encoder tasks from main CPU |
| Functional Safety Certification Support | Built-in BIST, voltage/clock monitors, FMPLL slip detector, and AJSM security module - accelerates IEC 61508 SIL-3 and ISO 26262 ASIL-D certification |
| Real-Time Control Peripherals | 7 ePWM modules with deadband, trip zones, and synchronization to dual MibADCs; 6 eCAP and 2 eQEP modules - enables precise motor control and motion feedback |
Applications
| Industrial Safe PLCs | Turbine & Windmill Control |
|---|---|
Use Scenario: Programmable logic controller executing safety-rated ladder logic and motion sequences in hazardous zones. IC Role / Device Role / Timing Role: Primary safety controller managing I/O scanning, diagnostics, and fail-safe output activation with <100 µs response latency. Use Value: Dual lockstep execution and ECC memory ensure deterministic behavior under EMI, radiation, or voltage transients - meeting SIL-3 requirements per IEC 61508. |
Use Scenario: Pitch and yaw control system regulating blade angle and nacelle orientation in wind turbines. IC Role / Device Role / Timing Role: Real-time motion controller interfacing with resolvers, encoders, and servo drives via eQEP and ePWM peripherals. Use Value: N2HET timing coprocessors generate synchronized PWM waveforms while eCAP captures encoder edges - enabling sub-degree positioning accuracy. |
| Medical Infusion Pumps | Robotic Surgery Systems |
Use Scenario: Battery-powered infusion pump delivering precise drug dosages with pressure and flow monitoring. IC Role / Device Role / Timing Role: Safety monitor and actuator driver coordinating stepper motor control, ADC-based pressure sensing, and LIN communication to host. Use Value: Integrated LIN 2.1 interface and dual MibADCs with 64-word parity buffers enable reliable closed-loop dosage control - certified per IEC 62304 Class C. |
Use Scenario: Master controller in robotic surgical arm managing joint torque, position, and thermal feedback. IC Role / Device Role / Timing Role: High-integrity motion coordinator using eQEP for joint encoder feedback and ePWM for servo drive modulation. Use Value: 180-MHz Cortex-R4F with FPU executes inverse kinematics in real time while ECC RAM prevents calculation corruption - essential for ASIL-D compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar safety microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RM44L520PZ | Same 100-pin LQFP package but reduced 768KB flash and 2× eQEP (vs. 2× on RM44L920APZT); no I2C interface | Targeted at cost-sensitive SIL-2 systems where full 1MB flash and I2C are unnecessary | Select when flash footprint and peripheral count can be reduced without compromising safety architecture |
| RM46L852PGE | 144-pin LQFP, 220-MHz Cortex-R4F, 1280KB flash, EMAC, USB OHCI - adds networking and higher performance | Used in networked safety gateways and multi-axis CNC controllers requiring Ethernet connectivity | Choose when 100-pin footprint is insufficient and Ethernet/USB interfaces are required for system integration |
Compared with RM44L520PZ, RM44L920APZT provides 256KB more ECC flash and retains I2C for sensor hub expansion; versus RM46L852PGE, it trades EMAC/USB for smaller footprint and lower power - making RM44L920APZT optimal for space-constrained SIL-3 motion controllers.
Availability
RM44L920APZT is available at Aetrix Electronics and suitable for industrial safety PLCs, turbine control systems, and medical infusion pumps requiring stable component supply across extended product lifecycles.
Supply support for RM44L920APZT 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 leader specializing in analog, embedded processing, and digital signal technologies with over 50 years of industrial and automotive IC innovation.
The RM44Lx20 product line delivers ARM Cortex-R-based MCUs engineered specifically for IEC 61508 functional safety applications - integrating lockstep CPUs, ECC memory, and self-test logic to accelerate SIL-3 certification in industrial automation and medical devices.
FAQ
What safety certifications does the RM44L920APZT support?
The RM44L920APZT is architected to meet IEC 61508 SIL-3 requirements, with dual lockstep CPUs, ECC on flash and RAM, built-in self-test (BIST) for CPU and memory, voltage and clock monitoring, and an Error Signaling Module (ESM) with dedicated nERROR pin. Texas Instruments provides functional safety documentation, FMEDA reports, and safety manuals to support certification efforts - all applicable to the RM44L920APZT device variant.
Does the RM44L920APZT include hardware floating-point support?
Yes, the RM44L920APZT integrates an ARM Cortex-R4F CPU with a single- and double-precision floating-point unit (FPU), enabling efficient execution of math-intensive algorithms such as motor control field-oriented control (FOC), sensor fusion, and real-time kinematics - all within the deterministic timing constraints required for safety-critical applications.
How many CAN interfaces does the RM44L920APZT provide, and what protocol versions are supported?
The RM44L920APZT includes three DCAN controllers compliant with CAN Protocol Version 2.0A and 2.0B, each supporting up to 1 Mbps data rate and 64 mailboxes with parity protection. These interfaces are fully integrated into the Hercules safety architecture and are validated for use in SIL-3 systems - confirmed in the RM44L920APZT datasheet Section 1.1 and Table 3-1.
What is the maximum operating frequency and power supply range for the RM44L920APZT?
The RM44L920APZT operates at up to 180 MHz with a core supply voltage (VCC) of 1.14 V to 1.32 V and I/O supply voltage (VCCIO) of 3.0 V to 3.6 V. These specifications are defined in the Recommended Operating Conditions table (Section 5.4) of the official RM44L920APZT datasheet and apply directly to the 100-pin PZ package variant.
Is the RM44L920APZT pin-compatible with other devices in the RM44Lx20 family?
The RM44L920APZT shares the same 100-pin LQFP (PZ) package footprint with the RM44L520PZ, but they are not functionally pin-compatible due to differences in peripheral mapping - notably, RM44L920APZT includes I2C and full 3× CAN support, while RM44L520PZ omits I2C and reduces eQEP count. Pin compatibility must be verified per signal-level terminal function tables in Section 4.2 of the datasheet.
RM44L920APZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Hercules™ RM4 ARM® Cortex®-R4, Functional Safety (FuSa)
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-R4F
- Core Size:
- 16/32-Bit
- Speed:
- 120MHz
- Connectivity:
- CANbus, LINbus, MibSPI, SCI, SPI, UART/USART
- Peripherals:
- DMA, POR, PWM, WDT
- Number of I/O:
- 45
- Program Memory Size:
- 1MB (1M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.14V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
RM44L920APZT FAQ
1.How can I place an order for RM44L920APZT through Aetrix?
Please submit a Request for Quotation (RFQ) for RM44L920APZT 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 RM44L920APZT reliable?
The price and inventory of RM44L920APZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM44L920APZT is usually 5 days.
3.What payment methods are accepted for RM44L920APZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM44L920APZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM44L920APZT?
RM44L920APZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM44L920APZT 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 RM44L920APZT?
For technical support, including RM44L920APZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM44L920APZT requirements.
6.How does Aetrix verify that RM44L920APZT is sourced from the original manufacturer or authorized distributors?
All RM44L920APZT 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 RM44L920APZT meets industry standards.
7.What is the process for return or replacement of RM44L920APZT?
All RM44L920APZT units undergo pre-shipment inspection (PSI). If there is an issue with RM44L920APZT, 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 RM44L920APZT part is unused and in its original packaging.
Return procedure for RM44L920APZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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