Timeline for How to build an ultra-low power time counter?
Current License: CC BY-SA 3.0
3 events
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| Apr 8, 2011 at 22:40 | comment | added | supercat | The counter and about 16 bytes (4x32 bits) of RAM would be separately powered, and should be able to run for decades off a very small battery, or for days if not weeks off a supercap. From a programming standpoint, it would be nice if the compare register could do a magnitude compare rather than just an equality compare, but provided there aren't weird synchronization issues, software should be able to work just fine using a latching equality comparer. | |
| Apr 8, 2011 at 22:37 | comment | added | supercat | I wish there were some way to design something nice and psychically convince a microcontroller manufacturer that they should build it into their product. It would seem that a few cascaded quadrature graycode counters (within a single chip) should be able to count using less current than would be required by a synchronous counter, but with a cleaner output than would be offered by a ripple counter. My ideal device would probably have a 48-bit resettable counter which was readable as either the top or bottom 32 bits, along with a 32-bit compare register. | |
| Apr 8, 2011 at 21:03 | history | answered | Arturo Gurrola | CC BY-SA 3.0 |