Datasheet

3
RM57L843
www.ti.com SPNS215C –FEBRUARY 2014–REVISED JUNE 2016
Submit Documentation Feedback
Product Folder Links: RM57L843
Device OverviewCopyright © 2014–2016, Texas Instruments Incorporated
1.3 Description
The RM57L843 device is part of the Hercules RM series of high-performance ARM® Cortex®-R-based
MCUs. Comprehensive documentation, tools, and software are available to assist in the development of
IEC 61508 functional safety applications. Start evaluating today with the Hercules RM57x LaunchPad
Development Kit. The RM57L843 device has on-chip diagnostic features including: dual CPUs in lockstep,
Built-In Self-Test (BIST) logic for CPU, the N2HET coprocessors, and for on-chip SRAMs; ECC protection
on the L1 caches, L2 flash, and SRAM memories. The device also supports ECC or parity protection on
peripheral memories and loopback capability on peripheral I/Os.
The RM57L843 device integrates two ARM Cortex-R5F floating-point CPUs, operating in lockstep, which
offer an efficient 1.66 DMIPS/MHz, and can run up to 330 MHz providing up to 547 DMIPS. The device
supports the little-endian [LE] format.
The RM57L843 device has 4MB of integrated flash and 512KB of data RAM with single-bit error correction
and double-bit error detection. The flash memory on this device is a nonvolatile, electrically erasable and
programmable memory, implemented with a 64-bit-wide data bus interface. The flash operates on a 3.3-V
supply input (the same level as the I/O supply) for all read, program, and erase operations. The SRAM
supports read and write accesses in byte, halfword, and word modes.
The RM57L843 device features peripherals for real-time control-based applications, including two Next
Generation High-End Timer (N2HET) timing coprocessors with up to 64 total I/O terminals.
The N2HET is an advanced intelligent timer that provides sophisticated timing functions for real-time
applications. The timer is software-controlled, with a specialized timer micromachine and an attached I/O
port. The N2HET can be used for pulse-width-modulated outputs, capture or compare inputs, or GPIO.
The N2HET is especially well suited for applications requiring multiple sensor information or drive
actuators with complex and accurate time pulses. The High-End Timer Transfer Unit (HTU) can perform
DMA-type transactions to transfer N2HET data to or from main memory. A Memory Protection Unit (MPU)
is built into the HTU.
The Enhanced Pulse Width Modulator (ePWM) module can generate complex pulse width waveforms with
minimal CPU overhead or intervention. The ePWM is easy to use and supports both high-side and low-
side PWM and deadband generation. With integrated trip zone protection and synchronization with the on-
chip MibADC, the ePWM is ideal for digital motor control applications.
The Enhanced Capture (eCAP) module is essential in systems where the accurately timed capture of
external events is important. The eCAP can also be used to monitor the ePWM outputs or for simple PWM
generation when not needed for capture applications.
The Enhanced Quadrature Encoder Pulse (eQEP) module directly interfaces with a linear or rotary
incremental encoder to get position, direction, and speed information from a rotating machine as used in
high-performance motion and position-control systems.
The device has two 12-bit-resolution MibADCs with 41 total channels and 64 words of parity-protected
buffer RAM. The MibADC channels can be converted individually or by group for special conversion
sequences. Sixteen channels are shared between the two MibADCs. Each MibADC supports three
separate groupings. Each sequence can be converted once when triggered or configured for continuous
conversion mode. The MibADC has a 10-bit mode for use when compatibility with older devices or faster
conversion time is desired. One of the channels in MibADC1 and two of the channels in MibADC2 can be
used to convert temperature measurements from the three on-chip temperature sensors.
The device has multiple communication interfaces: Five MibSPIs; four UART (SCI) interfaces, two with LIN
support; four CANs; two I2C modules; and one Ethernet controller. The SPI provides a convenient method
of serial interaction for high-speed communications between similar shift-register type devices. The LIN
supports the Local Interconnect standard (LIN 2.1) and can be used as a UART in full-duplex mode using
the standard Non-Return-to-Zero (NRZ) format. The DCAN supports the CAN 2.0B protocol standard and
uses a serial, multimaster communication protocol that efficiently supports distributed real-time control with
robust communication rates of up to 1 Mbps. The DCAN is ideal for applications operating in noisy and