RM41L232BPZT

The RM41L232 devices are a family of high-performance microcontrollers for safety systems. The safety architecture includes dual CPUs in lockstep, CPU and memory built-in self-test (BIST) logic, ECC on flash and data SRAM, parity on peripheral memories, and loopback functionality on peripheral IOs. The RM41L232 devices integrate an ARM Cortex-R4 CPU offering an efficient 1.66 DMIPS/MHz, operating at frequencies up to 80MHz to deliver up to 132 DMIPS. The device supports little-endian (LE) format. The RM41L232 devices feature 128KB integrated flash and 32KB data RAM with single-bit error correction and double-bit error detection. The flash memory on this device is an electrically erasable and programmable non-volatile memory implemented with a 64-bit wide data bus interface. For all read, program, and erase operations, the flash operates at a 3.3V supply input (the same level as the I/O supply). In pipeline mode, the flash can operate at a system clock frequency of 80MHz. The SRAM supports single-cycle read/write access in byte, half-word, and word modes across the full supported frequency range. The RM41L232 devices include peripherals for real-time control applications, including a Next Generation High-End Timer (N2HET) timing coprocessor with up to 19 I/O pins total and a 12-bit ADC supporting 16 inputs, in a 100-pin package. N2HET1 is an advanced intelligent timer capable of providing precise timing functions for real-time applications. The timer is software-controlled, uses a reduced instruction set, and features a dedicated timer micromachine and an associated I/O port. N2HET can be used for PWM output, capture or compare input, or GPIO. N2HET is particularly well-suited for applications requiring multiple sensor inputs and complex, precise timing pulses to drive actuators. A High-End Timer Transfer Unit (HTU) can perform DMA-type transfers of N2HET data to and from main memory. A Memory Protection Unit (MPU) is built into the HTU. The Enhanced Quadrature Encoder Pulse (eQEP) module is used to directly interface with a linear or rotary incremental encoder to obtain position, direction, and speed information from a rotating machine in a high-performance motion and position control system. The device features a 12-bit resolution MibADC with 16 channels and a 64-word buffer RAM with parity protection. MibADC channels can be converted individually or grouped by software for sequential conversion sequences. There are three independent groups. Each group can be converted once upon triggering or configured to perform continuous conversion mode. The device provides multiple communication interfaces: one MibSPI, two SPIs, one UART/LIN, and two DCANs. SPI provides a convenient serial interaction method for high-speed communication between similar shift-register-type devices. UART/LIN supports the Local Interconnect standard 2.1 and can be used as a full-duplex UART using the standard non-return-to-zero (NRZ) format. DCAN supports the CAN 2.0B protocol standard and uses a serial multi-master communication protocol that efficiently supports distributed real-time control with robust communication at rates up to 1Mbps. DCAN is well-suited for applications in noisy and harsh environments (such as automotive and industrial sectors) that require reliable serial communication or multiplexed wiring. The Frequency-Modulated Phase-Locked Loop (FMPLL) clock module is used to multiply an external frequency reference to a higher frequency for internal use. The FMPLL provides one of five possible clock source inputs to the Global Clock Module (GCM). The GCM manages the mapping between available clock sources and device clock domains. The device also features an External Clock Prescaler (ECP) module. When the ECP is enabled, it outputs a continuous external clock on the ECLK pin. The ratio of the ECLK frequency to the Peripheral Interface Clock (VCLK) frequency is user-programmable. This low-frequency output can be externally monitored as an indicator of the device operating frequency. The Error Signaling Module (ESM) monitors all device errors and determines whether to trigger an interrupt or an external error pin upon fault detection. The nERROR pin can be externally monitored as an indicator of fault conditions within the microcontroller. The I/O Multiplexing and Control Module (IOMM) allows configuration of input/output pins to support alternate functions. With integrated safety features and a wide range of communication and control peripherals, the RM41L232 devices are an ideal solution for safety-critical real-time control applications.

Applications

• Industrial safety applications
• Industrial automation
• Safety PLC
• Power generation and distribution
• Turbines and wind engines
• Elevators and escalators
• Medical applications
• Ventilators
• Defibrillators
• Infusion pumps and insulin pumps
• Radiation therapy
• Robotic surgery

Key features

• High-performance microcontroller for safety-critical applications
• Dual CPUs operating in lockstep
• ECC on flash and RAM interfaces
• Built-in self-test for CPU and on-chip RAM
• Error Signaling Module (ESM) with error pin
• Voltage and clock monitoring
• ARM Cortex-R4 32-bit RISC CPU
• High-efficiency 1.66 DMIPS/MHz with 8-stage pipeline
• 8-region Memory Protection Unit (MPU)
• Open architecture with third-party support
• Operating condition: 80MHz system clock
• Core supply voltage (VCC): 1.2V nominal
• I/O supply voltage (VCCIO): 3.3V nominal
• ADC supply voltage (VCCAD): 3.3V nominal
• Integrated memory: 128KB program flash with ECC
• 32KB RAM with ECC
• 16KB flash with ECC for EEPROM emulation
• Hercules common platform architecture
• Consistent memory map across family
• Real-Time Interrupt (RTI) timer (OS timer)
• 96-channel Vector Interrupt Module (VIM)
• 2-channel Cyclic Redundancy Checker (CRC)
• Frequency-Modulated Phase-Locked Loop (FMPLL) with built-in slip detector
• IEEE 1149.1 JTAG, boundary scan, and ARM CoreSight components
• Advanced JTAG Security Module (AJSM)
• Multiple communication interfaces
• Two CAN controllers (DCAN)
• DCAN1 – 32 mailboxes with parity protection
• DCAN2 – 16 mailboxes with parity protection
• Compatible with CAN protocol version 2.0B
• Multi-buffered SPI (MibSPI) module
• 128 words with parity protection
• Two standard SPI modules
• UART (SCI) with LIN 2.1 interface support
• High-End Timer (N2HET) module
• Up to 19 programmable pins
• 128-word instruction RAM with parity protection
• Dedicated High-End Timer Transfer Unit (HTU)
• Enhanced Quadrature Encoder Pulse (eQEP) module
• Motor position encoder interface
• 12-bit multi-buffered ADC module
• 16 channels
• 64 result buffers with parity protection
• Up to 45 GPIO function pins
• 8 dedicated GPIO pins with up to 8 external interrupts
• Package: 100-pin QFP (PZ) [Green]