[JMN] took some time to look at the MSP430G2553 mircocontroller (translated). Specifically, he was interested in the clock options and the low power modes. This chip is one of the upgraded processors which have been shipping with the TI Launchpad.
Both the MSP430G2553 and MSP430G2452 come with the Launchpad development board. They replace the MSP430G2231 and MSP430G2211 which came with the original offering. If you already have a Launchpad the chips themselves can be had for around $2.25 and are easily programmed since the development hardware hasn’t changed.
The review starts off by looking at clock options for the processor. The internal VLO is put to the test first, with a look at the power consumption followed by temperature stability through the use of a hair dryer. The actual frequency provided has fairly low accuracy, but it stays pretty stable when hit with the hot air. The next test uses the provided 32.768 kHz clock crystal as an external input. The crystal came with the Launchpad board, and the chip has configurable internal capacitors so this is as easy as soldering the package in place. Hit the link at the top to find out how this clock source fared in testing.