25 cents gets 25 features: how to use the MCU for simple enhancements

If you have a 25-cent MCU, what can you do with 0.5KB of memory?

You may now have fixed-function integrated circuits (ICs) for a long time, and in some cases have adapted to their limited flexibility. A simple Universal Asynchronous Receiver Transmitter (UART) to Serial Peripheral Interface (SPI) bridge, a reset controller, or an external real-time controller (RTC) with back-up memory performs well in its own right, but But only for the set function.

But if you can intelligently or customization to better meet your needs? If you can use a separate low-cost MCU to achieve these independent functions?

The new MSP430 ™ Value Sensing MCUs help deploy simple sensing solutions with a variety of integrated mixed-signal capabilities. To expand the capabilities of these low-cost MCUs, TI has created a library of code instances for 25 common system-level functions, including timers, input / output (I / O) expanders, system reset controllers, electrically erasable and programmable Read memory (EEPROM) and so on.

The 25 functions are divided into four functional categories that are common in standard circuits: system management, pulse width modulation, timers and communications. When using the MSP430FR2000 device, most code examples are available for less than 0.5KB of memory, and the lowest-cost MSP430 MCUs cost as little as 29 cents in 1000 units and more as low as 25 cents. Figure 1 shows some discrete functional integrated circuits, such as an external monitor or a real-time clock integrated circuit, that can be replaced with the corresponding ones of the 25 functions. If you use multiple integrated circuits or functions as shown (such as timers or PWMs), even multiple functions can be combined to meet your application needs, reducing your workload and board space.

To help you understand and use these features, TI has produced an electronic manual that contains 25 short application notes with source code links. Within minutes, it is possible to compile, download the source code and run on the MSP430 Value Sensing MCUs. Features can be adapted to your application needs, dramatically reducing time-to-market.

As we begin to understand programmable alternatives to many of our fixed-function integrated circuits, and we look forward to seeing what you can do with 25 features, we'll continue to build a family of application

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 Author：Brittany Antonia （The author of article owns the copyright.）