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Canon card F-56

Date of introduction:  June 1981 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  6.1" x 3.0" x 0.80"
 154 x 75 x 20 mm3
 
Weight:  3.1 ounces, 87 grams Serial No:  533234
Batteries:  2*AA Date of manufacture:  year 1981
AC-Adapter:   Origin of manufacture:  Japan
Precision:  11  Integrated circuits:  NEC uPD1854G
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

F-56_1.jpg (16667 Byte)The Canon F-56 Scientific Statistical Calculator is together with its sibling F-64 one of the few Canon products based on NEC single-chip calculator circuits. One of the odd behaviors of the NEC uPD1854G circuit is the left to right entry method. 

Running the
Calculator Forensics on the F-56 reveals with 9.0001495941 an impressive result compared to similar calculators of the early 80's. On the other hand supports the chip no rounding of the display results. 

F-56_PCB.jpg (53187 Byte)The internal construction of the F-56 is pretty simple and uses only few components on a single-sided printed circuit board (PCB)..

The later F-58 makes use again of a Toshiba calculator circuit. 




If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, March 5, 2006. No reprints without written permission.