Simple functions such as timer replacement, input/output expanders, system reset controllers and stand-alone EEPROM are common on PCBs. Low-cost, ultra-low-power MSP430™ value line microcontrollers (MCUs) offer cost savings when replacing digital and analog functions in a system. Watch this series to see how MSP430 MCUs can be used to enhance communication, pulse width modulation, systems and housekeeping, and timer functions in your next design.
This training series covers LEA or Low Energy Accelerator a vector math co-processor, the performance benchmark, and how to get started on the new MSP430FR599x. LEA is capable of performing various signal processing tasks efficiently without any CPU intervention. For example, LEA can perform a 256-point complex FFT in just ~5k cycles whereas a Cortex-M4F would take approximately 17k cycles (3.6x improvement).
Non-technical losses (“theft”) account for billions of dollars of revenue loss for utility providers around the world as individuals are able to hack meters to slow or stop the accumulation of energy usage statistics. This loss has driven increased requirements for enhancing the protection designed into new smart meters. This training session will discuss different methods of attacking smart meters and how TI’s analog portfolio can be used to detect or even prevent these attacks. In one scenario magnets are used to saturate any transformers present in the system.
Delta-sigma analog-to-digital converters (ADCs) are oversampling converters typically used in applications requiring higher resolution. However, ADCs do not work by themselves. In fact, they require several key components around them, including a front-end amplifier, a voltage reference, a clock source, power supplies, and a good layout. Many devices integrate these features together with the ADC to offer a complete system solution, which simplifies the design for customers and minimizes board space.
The first line of defense against tampering by bypassing current, reversing connections, and disconnecting leads is the meter case. Due to this, it is common for utilities to require some form of intrusion detection system to detect when someone opens a case. In this section, we will cover how to detect someone trying to open the case of a meter.
For anti-tampering, it is common to try to detect the presence of a strong magnet. In this section, we will cover the use of hall sensors for low-power detection of strong magnetic fields in three dimensions. Details on our magnetic tamper detection reference design, TIDA-00839, will be provided as well as some of the design considerations that were kept in mind when creating this reference design.
The TMP116 digital precision temperature sensor for the -55 to +125ºC range achieves higher accuracy than the Class AA PT sensor with a 1-point calibration. A small PCB including TI's TPD1E10B06 or TPD1E04U04 protection devices can be sealed into a RTD metal tube and meet the EN 61000-4-2 and -4-4 levels of ESD protection. The 64-bit internal EEPROM inside TMP116 stores user defined calibration data into the digital temperature sensor, simplifying integration with application MCUs, such as MSP430FR6047, FR6989 or CC13xx/26xx wireless MCU families.
This training covers the fundamental design techniques required to implement a successful capacitive sensing hardware design. This series will explore a number of design topics, including: Basic layout guidelines overlays, back lighting; Dealing with moisture; Self capacitance sensors; Mutual capacitance sensors; and Proximity sensors.
This 7 Part Series with the MSP430 5xx Experimenters Board will cover the following topics:
- Active and low power mode operation
- Mixed signal application example
- Hardware timers to conserve power
- Implementing a fully optimized ADC12 routine
- MSP430 tools, resources, and conclusions
In this section, we will cover how to harden a meter against these magnetic tamper attacks by using shunts for current sensors. For poly-phase implementations, I will go over how to use isolated delta sigma modulators to add the necessary isolation to use shunt current sensors and create magnetically immune poly-phase energy measurement systems. The TIDA-00601 and TIDA-01094 reference designs, which show how to implement a poly-phase isolated shunt measurement system, will be discussed as well as the associated AMC1304 high-side power supplies used in these designs.
This section covers what is meter tampering, why is this a problem for utility providers, and some common ways a meter is tampered.