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Additional Pictures 

 

The TP0456 microcomputer based
Primary-Secondary architecture found
in the TI-54 calculator.
The CD4551 is the Primary chip, the smaller 
CD4555 the Secondary chip.

The TP0456 microcomputer based
Primary-Secondary architecture found
in the TI-57 LCD calculator.
The CD4572 is the Primary chip, the smaller 
CD4555 the Secondary chip.

The TP0456 microcomputer based
Primary-Secondary architecture found
in the TI-57 LCD calculator.
The CD4572 is the Primary chip, the smaller 
CD4555 the Secondary chip.


horizontal rule

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

Joerg Woerner, June 13, 2003. No reprints without written permission.