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Texas Instruments TMC0582

Features

With the TMC05xx building blocks Texas Instruments created a novel architecture for scalable scientific calculators. The architecture uses minimum a 2 chip design with the Arithmetic chip TMC0501E and the SCOM (scanning read only memory) but was expandable to a maximum of 8 SCOM's, additional RAM as program memory for programmable calculators, additional RAM for general purpose registers and even a chip driving a printer. 

The TMC0582 Double Scanning Read Only Memory DSCOM contains 2.5k*13 instruction memory and 16*16 digits constants.

Additional functions of the TMC0582 include scanning of the display digit driver outputs and the keyboard. 

Usage

SR-60A, TI-58, TI-59

Technical Specification

Item Min Typ Max Unit Comments
VSS   0   V  
VDD -10.5 -10.0 -9.5 V  
VGG -16.3 -15.8 -15.3 V  
PHI1, PHI2   225 230 kHz Opposite phases

Housing

The TMC0582 uses a shrinked SDIP-28 package.

Pin Description

Pin IO Function Pin IO Function
1 O Digit driver 15 28 O Digit driver 14
2 V Negative Voltage VGG 27 O Digit driver 13 (OVER)
3 V Negative Voltage VDD 26 O Digit driver 12 (E-MSD)
4 IO SCOM Interface D0 25 O Digit driver 11
5 IO SCOM Interface D1 24 O Digit driver 10
6 IO SCOM Interface D2 23 O Digit driver 9
7 IO SCOM Interface D3 22 O Digit driver 8
8 O Instruction words 21 O Digit driver 7
9 I Calculating status 20 O Digit driver 6
10 I External access 19 O Digit driver 5
11 I Clock Input 2 18 O Digit driver 4
12 I Clock Input 1 17 O Digit driver 3 (M-LSD)
13 V Common Voltage 16 O Digit driver 2 (E-MSD)
14 O Digit driver 0 15 O Digit driver 1 (E-LSD)

Keyboard Scanmatrix

The keyboards of all calculators based on the TMC0501 Arithmetic chip consist of a x/y-matrix connected to the SCOM digit driver outputs and the TMC0501 keymatrix inputs. 

  KN KO KP KQ KR KS KT
D0 (?)    (?)        
D1    
D2    2ND INV lnX   CE  CLR
D3    LRN  X#T  x2    sqrX  1/X
D4    SST  STO RCL    SUM  yX
D5    BST  EE  (    ) :
D6    GTO  7  8    9  *
D7    SBR  4  5  TI58!  6  -
D8    RST  1  2    3  +
D9    R/S  0  .    +/-  =
D10          Card Sense    
D11              
D12  (?)   (?)         
D13              
D14              
D15  (?)    (?)        

Comments: The TI-58 is identified by a diode between D7 - KR, the TI-59 detects the Card Sense switch between D10 - KR. The (?) nodes are used to detect PRINT, PAPER ADVANCE and TRACE on the PC-100A.

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

Joerg Woerner, February 02, 2001. No reprints without written permission.