DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
 | 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 TMC0501 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. Most scientific and programmable calculators from Texas Instruments between the years 1974 and 1982 (SR-50..TI-59) use these chips.
The up to thirteen TMC0599 MULTI-REGISTER chips provide user program storage and user memory storage in the SR-52, SR-56 and SR-60(A). Each chip contains 1920 bits of read/write memory holding either 240 program steps or 30 data registers.
| Usage |
SR-52, SR-56, SR-60, SR-60A
| Calculator | Program steps | Data memory | TMC0599 |
| SR-52 | 224 | 20 | 2 |
| SR-56 | 100 | 10 | 1 |
| SR-60 | 480 | 40 | 5 |
| SR-60A | 1920 | 100 | 13 |
| 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 |
| HousingThe TMC0599 uses a
standard DIP-16 package. |
| Pin Description |
| Pin | IO | Function | Pin | IO | Function |
| 1 | V | Negative Voltage VDD | 16 | I | External access |
| 2 | I | Calculating status | 15 | I | not connected |
| 3 | I | Clock Input 1 | 14 | I | not connected |
| 4 | I | Clock Input 2 | 13 | O | Instruction words |
| 5 | IO | SCOM Interface D0 | 12 | I | Bank-Select 1 (VSS,nc) |
| 6 | IO | SCOM Interface D1 | 11 | I | Bank-Select 0 (VSS,nc) |
| 7 | IO | SCOM Interface D2 | 10 | IO | SCOM Interface D3 |
| 8 | V | Common Voltage | 9 | V | Negative Voltage VDD |
If you have additions to the above datasheet please email: joerg@datamath.org.
© Joerg Woerner, February 02, 2001. No reprints
without written permission.