Speed Evaluation of the FT900 MCU

The Dhrystone MIPS (DMIPS) computing benchmark program can be used to give a thorough evaluation of the speed and performance levels that can be achieved by different microcontroller (MCU) devices. FTDI Chip has now evaluated its new FT900 32-bit, RISC-based MCU using this program with interesting results being derived.

Many MCU products on the market will cite the DMIPS/MHZ on their datasheets. Examples can be seen in the table here. However, these figures are based on 0 wait state operation. Flash-based MCUs will generally max out of 0 wait states if they are operating above the 25-30MHz mark. Operation beyond these frequencies will mean that the engineer will be forced to add 1, 2 or even 3 wait states in order to run the MCU at its maximum stated operated frequency. By adding wait states, particularly to a RISC CPU, performance is in danger of being crippled. This limitation is, of course, not generally publicised.

FTDI Chip’s innovative FT32 architecture, as used by the FT900, overcomes this restriction through utilization of its shadow RAM – executing at true 0 wait states up to the full operating core frequency of the MCU (100MHz), without any operational compromise being witnessed.


Leave a Reply

Your email address will not be published.

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>