DATAMATH CALCULATOR MUSEUM |
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 SCOMs, additional RAM as program memory for programmable calculators, additional RAM for general purpose registers and even a chip driving a printer.
The TMC0584 Double Scanning Read Only Memory DSCOM contains 2.5k*13 instruction memory and 16*16 digits constants.
The scanning function is not used with the known calculators.
Type | Calculators | Function |
TMC0581 | SR-51-II | DSCOM |
TMC0582 | TI-58, TI-59, SR-60A | DSCOM 1, with TMC0571 |
TMC0583 | TI-58, TI-59, SR-60A | DSCOM 2, with TMC0571 |
TMC0584 | SR-60(A) | DSCOM |
TMC0587 | TI-5230 | DSCOM 1, with BROM |
TMC0588 | TI-5230 | DSCOM 1, with TMC0572 |
TMC0580/CD2401 | TI-58C | DSCOM 1, with TMC0573 |
TMC0580/CD2402 | TI-58C | DSCOM 2, with TMC0573 |
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 |
The TMC0584 uses a 0.4” wide 28-pin SPDIP (Shrink Plastic Dual In-line Package with a 0.07” / 1.778 mm lead pitch).
Pin | IO | Function | Pin | IO | Function |
1 | O | 28 | O | ||
2 | V | Negative Voltage VGG | 27 | O | |
3 | V | Negative Voltage VDD | 26 | O | |
4 | IO | SCOM Interface D0 | 25 | O | |
5 | IO | SCOM Interface D1 | 24 | O | |
6 | IO | SCOM Interface D2 | 23 | O | |
7 | IO | SCOM Interface D3 | 22 | O | |
8 | O | Instruction words | 21 | O | |
9 | I | Calculating status | 20 | O | |
10 | I | External access | 19 | O | |
11 | I | Clock Input 2 | 18 | O | |
12 | I | Clock Input 1 | 17 | O | |
13 | V | Common Voltage | 16 | O | |
14 | O | 15 | O |
If you have additions to the above datasheet please email: joerg@datamath.org.
© Joerg Woerner, February 02, 2001. No reprints
without written permission.