This application report describes the basic steps necessary to generate a simple pulse width modulation (PWM) with the next generation high-end timer (NHET) module. It reviews the calculations necessary to achieve a PWM with a certain frequency and duty cycle, setting up the NHET registers and writing the NHET program. Finally, it shows code excerpts of the setup to run the simple example code.
PDF, 205 Kb, File published: Jul 24, 2015
The Dual Clock Compare (DCC) may be configured to provide autonomous, real-time monitoring of the average frequency of a signal. This application report illustrates a configuration in which the DCC monitors the average PLL frequency. This comparison triggers an error when the average PLL falls out of a specified range. The accuracy window and the duration over which the frequency is averaged must
PDF, 780 Kb, File published: Dec 18, 2015
The application report illustrates the use of the safety library towards enabling diagnostics or tests on diagnostics applicable to the Herculesв„ў safety microcontrollers and TPS65381 Power Management Integrated Chip (PMIC).
PDF, 261 Kb, File published: Apr 20, 2015
This application report describes the interrupt and exception handling of the ARM Cortex-R4/5 processor as implemented on Hercules-based microcontrollers, as well as the related operating modes of the processor.
PDF, 1.1 Mb, File published: Apr 2, 2015
This application report illustrates two examples to monitor an incoming PWM signal using the versatile programmable high-end timer (N2HET). Both examples can be run in either the Herculesв„ў HDK or the LaunchPad board. The application report shows the N2HET program examples, the steps to setting up the N2HET registers as well as basic system settings utilizing the HalCoGen.This document
PDF, 227 Kb, File published: Jun 30, 2015
This application report describes the steps to generate PWM and Input capture using N2HET black-box driver provided by HALCoGen for the Hercules-based MCU’s. The content also covers both hardware and software timing restrictions of the N2HET module with the black-box driver configuration.
PDF, 95 Kb, File published: Jul 5, 2012
This application report describes a method to dynamically increase device frequency in a way that minimizes voltage dips on the board power supply. The PLL’s multiplier can be stepped in 8% steps every 50 reference clocks.
PDF, 53 Kb, Revision: A, File published: Jun 3, 2016
PDF, 139 Kb, File published: Apr 23, 2015
This application report describes what nested interrupts are and how a re-entrant interrupt handler can be implemented on Hercules-based microcontrollers. A reference implementation by ARM and an adjusted example implementation suitable for Hercules-based microcontrollers will be compared and discussed.This document assumes that you have some basic understanding of the different operating m
PDF, 726 Kb, File published: Feb 16, 2012
The Texas Instruments Herculesв„ў ARMВ® Safety Microcontrollers TMS570LS31x/S21x and RM4x series of products have two 12-bit analog-to-digital converters (ADC). This document provides the device configuration and layout recommendations to achieve the best performance of the embedded ADC. These include layout requirements on power and ground, decoupling and bypass capacitor requirement
PDF, 81 Kb, File published: Sep 27, 2011
The Texas Instruments Herculesв„ў ARMВ® Safety MCUs built using TI's F021 Flash process typically have one bank of Flash for emulating electrically erasable programmable read-only memory (EEPROM). This Flash is protected by single error correction double error detection (SECDED) error correcting code (ECC) bits. There is an additional feature to allow fully erased (all 1's) or fully program
PDF, 76 Kb, File published: Oct 19, 2015
This application report illustrates how to trigger the on-chip ADCs using various timer events. This allows the inputs to be sampled by the analog-to-digital converters (ADC) in synch with the timer events, which is a critical requirement in control applications. This application report includes an example program that illustrates a way to maximize the sampling rate for a set of three analog inp
PDF, 71 Kb, Revision: A, File published: Dec 8, 2014
Digital and Analog input pins require protection from input voltages that are negative or positive exceeding the maximum input levels. This is a practical explanation of using the Electrostatic Discharge (ESD) protection diodes that are part of the input pins to help limit the voltage if input current is limited.
PDF, 145 Kb, File published: Jan 26, 2015
This application report describes using a spreadsheet to calculate the aging effect of temperature on Texas Instruments Hercules Safety MCUs.
PDF, 72 Kb, File published: Mar 22, 2015
This application report summarizes the necessary steps to setup the direct memory access controller (DMA) to transfer data between the SCI and the data RAM of the microcontroller, freeing the CPU during the entire message transmission. Detailed code examples are provided as guidelines for the different setup steps.
PDF, 83 Kb, File published: Feb 17, 2012
The purpose of this application report is to provide help setting up the cyclic redundancy check (CRC) controller of the Herculesв„ў TMS570 and RM4 microcontrollers. The Hercules microcontrollers from Texas Instruments are 32-bit RISC microcontrollers based on the ARMВ® Cortexв„ў-R4 core with an advanced architecture and a rich peripheral set that supports on-chip diagnostics to a
PDF, 368 Kb, Revision: C, File published: Apr 12, 2012
The purpose of this application report is to provide help for configuring the PBIST module of TMS570LS series microcontrollers. It also explains the configurations, the different algorithm test durations and the influence on current consumptions.
PDF, 86 Kb, Revision: A, File published: Nov 4, 2011
This application report describes methods for measuring code execution time of TMS470 and TMS570 microcontrollers. Besides the typical pin toggle approach, where the duration between two pin toggles is measured, e.g., with an oscilloscope, Hercules MCUs support cycle count methods to measure the code execution time in terms of clock cycles.The real-time-interrupt (RTI) module hardware count
PDF,
126 Kb, File published:
Feb 23, 2011This application report describes the Flash and RAM ECC handling methods for TMSx70-based microcontrollers in general.To use the Flash/RAM ECC, the single error correction and double error detection (SECDED) module in the TMSx70 has to be configured accordingly. This application report covers typical software configurations of the SECDED modules and briefly explains some essential basics.
PDF, 64 Kb, Revision: A, File published: Sep 6, 2011
This application report shows how the high-end timer transfer unit (HTU), a local DMA on the TMS570 and RM4x devices that is dedicated to the extremely versatile programmable timer co-processor (NHET), can be used to offload tasks from the main CPU by doing transfers between the main memory and the NHET. It shows how to set up the HTU, covers specific details that need to be taken into account whe
PDF, 113 Kb, File published: Aug 4, 2016
This application report describes how the to use the embedded CRC module found on all Hercules devices, as well as how to calculate a signature for non-volatile memory with the TI ARMВ® Code Gen Tools Linker.
PDF, 804 Kb, File published: Apr 22, 2016
This application report describes how the Multi-Buffered Serial Peripheral Interface Module (MibSPIP) and the DMA modules found on many devices of the Hercules MCU family can be used to autonomously transfer data from and into the device embedded RAM. In addition to this, the parallel pin option of the MibSPIP module will be covered and used to increase the speed of the SPI link. This technique co
PDF, 548 Kb, Revision: A, File published: Sep 6, 2011
The purpose of this application report is to provide help for configuring the SCI/LIN module of Hercules microcontrollers for universal asynchronous receiver-transmitter (UART) communication. The document explains the SCI/LIN module configuration done in the UART driver that is used by Texas Instruments (TIв„ў) in a safety demo of the Hercules product family. The Hercules family of microcontro
PDF, 1.4 Mb, File published: Sep 6, 2011
PDF, 376 Kb, Revision: B, File published: Sep 6, 2011
Unbuffered multiplexed ratiometric analog-to-digital converters (ADC) have strict requirements on driving source impedance that are not always obvious. This application report addresses the trade-offs between source impedance and sample rate. It includes both 10-bit and 12-bit examples using the TMS470 processors and the Hercules ARM Safety MCUs (TMS470M, TMS570 and RM4x families) in the GS30, GS4
PDF, 79 Kb, File published: Mar 10, 2010
A Memory Protection Unit (MPU) is a module used to modify the memory types and attributes as defined in a processor’s memory ordering model. The MPU is specific to each core in the system and can only modify the memory ordering model of the CPU to which it is attached. If Texas Instruments TMSx70 platform of devices include a CortexR4 or a CortexM3 core, then as part of the core architecture, a MP
PDF, 659 Kb, File published: Jul 13, 2010
The purpose of this application report is to provide help for setting up the RTI Module of Hercules Safety Microcontrollers. The Hercules family of microcontrollers from Texas Instruments is a family of 32-bit RISC microcontrollers with an advanced safety architecture and a rich peripheral set.
PDF, 155 Kb, Revision: A, File published: Feb 14, 2014
The application report provides help to design a safety system with both the Hercules safety microcontrollers and the TPS65381 power supply. The document explains the hardware considerations and the software flowchart.
PDF, 61 Kb, File published: Nov 17, 2011
The purpose of this application report is to offer a convenient collection of references to application notes posted by ARM Ltd that apply to TI’s Hercules ARM Safety Microcontrollers. The document contains links directly to the ARM documents in the ARM On-Line InfoCenter as well as re-prints the ARM introduction chapter to help you better determine if you want to investigate further.
PDF, 103 Kb, Revision: A, File published: Sep 6, 2011
As new generations of microcontrollers lower their supply voltages from 5 V to 3.3 V and beyond, issues with interfacing and noise are increasing. This application report presents cost-effective interfacing techniques for inputs and outputs of 3.3 V microprocessors in an automotive environment. In addition, concerns about 3.3 V analog-to-digital converters (ADC) are discussed.
PDF, 371 Kb, File published: May 12, 2015
This application report illustrates how to generate sine waves using the versatile programmable high-end timer (N2HET) and its companion data transfer unit (HTU). The code example can be run in either the Hercules hardware development kit (HDK) or the Launchpadв„ў development kit. The application report shows the N2HET program examples, the steps to setting up the N2HET and HTU registers as we
PDF, 476 Kb, File published: May 1, 2015
This application report illustrates how to generate various forms of triangle and trapezoid waves using the versatile programmable high-end timer (N2HET). The examples can be run in either the Hercules hardware development kit (HDK) or the Launchpadв„ў development kit. The application report shows the N2HET program examples, the steps to setting up the N2HET registers as well as basic system s
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- Semiconductors > Microcontrollers (MCU) > Performance MCUs > Safety > Hercules TMS570
