In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Timothy D. Swieter wrote:

Or multiplex the segments fast enough like the article in June 2007 N&V article that used a PIC.  I think the software turned on each cathode and then quckly blinked each segment and then moved on to the next digit.  This adds more software, but eliminates the hardware.  Of course the digits are not at a full 100% duty cycle, but that may be OK.

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