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electronic:datasheet:mostek:mk50312 [2018/06/09 10:12] – [Pinout] tonyelectronic:datasheet:mostek:mk50312 [2026/09/05 04:57] (current) – external edit 127.0.0.1
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 <html><p style="text-align:center;"><b><font size="6">Mk50312</font></b></p></html> <html><p style="text-align:center;"><b><font size="6">Mk50312</font></b></p></html>
  
-====Pinout====+==== Pinout ==== 
 +{{:electronic:datasheet:mostek:mk50312.png?400 }} 
 +8-digit calculator, 9 function (+, -, x, /, %, $, SQRT, X^2, 1/X), seven memory functions
 <code> <code>
-Mostek MK50312 - 8-digit calculator, 9 function (+, -, x, /, %, $, SQRT, X^2, 1/X), seven memory functions +Keyboard Matrix:  
-              _____ _____ + 
-             |     U     |              Keyboard Matrix:  +      KN    KO    KS   Note: KS = KN && KO  
- (+9V) Vss --| 1      28 |-- f               KN    K0    KS   Note: KS = KN && K0  + D0         CM 
-         g --| 2      27 |-- b          D0         CM + D1   1     % 
-         d --| 3      26 |-- a          D1   1     % + D2   2     sum   = 
-         e --| 4      25 |-- c          D2   2     sum   = + D3   3     M-=   M- 
-        dp --| 5      24 |-- ISET       D3   3     M-=   M- + D4   4     SQRT  X^2 
-        D0 --| 6      23 |-- Vdd (Gnd)  D4   4     SQRT  X^2 + D5   5     1/X   . 
-       N/C --| 7      22 |-- KN         D5   5     1/X   . + D6   6     $     / 
-       N/C --| 8      21 |-- D1         D6   6     $     / + D7   7     M+=   M+ 
-        K0 --| 9      20 |-- D2         D7   7     M+=   M+ + D8   8     XM    x 
-       N/C --| 10     19 |-- D3         D8   8     XM    x + D9   9     MS    - 
-       D11 --| 11     18 |-- D4         D9   9     MS    - + D10  0     MR    + 
-       D10 --| 12     17 |-- D5        D10   0     MR    + + D11        C/CE 
-        D9 --| 13     16 |-- D6        D11         C/CE + 
-        D8 --| 14     15 |-- D7 +Note: D0, D10, D11 are for keyboard matrix only
-             |___________|             Note: D0, D10, D11 are for keyboard matrix only+
 </code> </code>
 +<html><br clear=all></html>
 Taken from data for MK50311 chip which has the same pinout, I have assumed same functions, might be wrong ... Taken from data for MK50311 chip which has the same pinout, I have assumed same functions, might be wrong ...
-The TRQ F-85 calculator, that uses this chip, has a switch with two positions 'N' and '∑', I'm not sure how this is connected.+The TRQ F-85 calculator, that uses this chip, has a switch with two positions 'N' and '∑', I'm not sure how this is connected.  I think it may switch a line between the 'KS' column and the 'KO' column, so if that line is connected to the "=" key it would switch its function from "=" to "sum" going by the table above.
 (The wiring of the TRQ F-85 board confirms the keyboard digit->row associations) ((http://www.calcuseum.com/SCRAPBOOK/BONUS/09734/1.htm)) (The wiring of the TRQ F-85 board confirms the keyboard digit->row associations) ((http://www.calcuseum.com/SCRAPBOOK/BONUS/09734/1.htm))
  
-====Calculators that used MK50312===+==== Calculators that used MK50312 ===
   * [[http://www.datamath.org/Related/Corvus/Corvus_615.htm|Corvus 615]]   * [[http://www.datamath.org/Related/Corvus/Corvus_615.htm|Corvus 615]]
   * [[https://www.subito.it/informatica/calcolatrice-dumont-corvus-615-anni-70-salerno-240894912.htm|Corvus 615]]   * [[https://www.subito.it/informatica/calcolatrice-dumont-corvus-615-anni-70-salerno-240894912.htm|Corvus 615]]
-  * [[http://mycalcdb.free.fr/main.php?l=0&id=6388|Corvus 804]], version 2. +  * [[:electronic:calculator:corvus804|Corvus 804]]
-  * [[http://www.teclas.org/maquina.php?mm=C261|Corvus 804]]+
   * [[http://www.calcuseum.com/SCRAPBOOK/BONUS/48657/1.htm|F-84]],  Electrónica Querol (TRQ) F84. ((Spain))   * [[http://www.calcuseum.com/SCRAPBOOK/BONUS/48657/1.htm|F-84]],  Electrónica Querol (TRQ) F84. ((Spain))
   * [[http://www.calcuseum.com/SCRAPBOOK/BONUS/09734/1.htm|F-85]],  Electrónica Querol (TRQ) F85. ((Spain))   * [[http://www.calcuseum.com/SCRAPBOOK/BONUS/09734/1.htm|F-85]],  Electrónica Querol (TRQ) F85. ((Spain))
 +

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electronic/datasheet/mostek/mk50312.1528539144.txt.gz · Last modified: 2018/06/09 10:12 by tony
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