Characterization of Single-chip Calculator Circuits - TMS0600 Product Family

The DCM-50A Platform supports the Characterization of TMS0600 Devices in its leftmost TMS0100 Textool Test Socket with the voltages V_SS set to 7.2V and V_GG set to -7.2V, accordingly.

TMS0601NC

Device-under-Test:

Keyboard: The TI-2550 makes use of a 1KS 146 keyboard assembly with 23 Klixon™ hermetic snap action switches mounted on a printed circuit board (PCB) and arranged in a 10*3 matrix with the rows connected to the D1-D11 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KQ (Keyboard Scan Constant) Inputs of the TMS0601NC single-chip calculator circuit. The [F 2 4] switch to select Floating or Fixed Decimal Point operation is connected between the D2 and D4 Outputs and the KP (Keyboard Scan Decimal Point) Input.

Keyboard Matrix of the TI-2550:

Display: The TI-2550 (PCB Type 2 and Display Type 3) makes use of a DIS206C Nine-Digit Calculator Numeric Seven-Segment LED Display module.

Display Layout:

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMS0601NC are not connected directly to the physical Digit positions of the DIS206C Nine-Digit Calculator Numeric Seven-Segment displays:

Note: The TMS0601 chip outputs in the unused Digit Positions D2 the position of the decimal point and D1 the value of most-significant digit of the number stored in the Memory.

The Output Decoder PLA of the TMS0601NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Note: The DIS206C Display module has Segment B, Segment C and the Decimal Point (Segment DP) of the leftmost digit not bonded out, changing the appearance of the Calculating Overflow, Memory Overflow and Memory Indicators accordingly.

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz without the Digit- and Segment-Blanking:

TMS0602NC

Device-under-Test:

Keyboard: The SR-11 makes use of a 3KS 103 keyboard assembly with 24 Klixon™ hermetic snap action switches mounted on a printed circuit board (PCB) and arranged in an 11*3 matrix with the rows connected to the D1-D11 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KP (Keyboard Scan Decimal Point) Inputs of the TMS0602NC single-chip calculator circuit. The [K] switch to select the Constant Mode is connected between the D10 Output and the KQ (Keyboard Scan Constant) Input.

Keyboard Matrix of the SR-11:

Display: The SR-11 (Version 2) makes use of twelve DISXXX Seven-Segment displays soldered onto a small DIS005G Display-PCB.

Display Layout:

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMS0602NC are not connected directly to the physical Digit positions of the DIS005G Twelve-Digit Calculator Numeric Seven-Segment display module:

Note: The TMS0602 chip outputs in the Digit Positions D11 with Segment H the minus sign of the Exponent (D3).

The Output Decoder PLA of the TMS0602NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz without the Digit- and Segment-Blanking:

TMS0603NC

Device-under-Test:

Keyboard: The Brother Model 827R (Version 2) makes use of a keyboard assembled with individual long-stroke push-button switches arranged in an 11*3 matrix with the rows connected to the D1-D11 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KQ (Keyboard Scan Constant) Inputs of the TMS0603NC single-chip calculator circuit. The [∑] switch to activate the Auto-Summation feature is connected between the D11 Output and the KP (Keyboard Scan Decimal Point) Input.

Keyboard Matrix of the Brother Model 827R (Version 2):

Display: The Brother Model 827R (Version 2) makes use of a Hewlett-Packard HP1130-0513 Nine-Digit Calculator Numeric Seven-Segment LED Display module with a discrete LED for the Memory Indicator.

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMS0603NC are not connected directly to the physical Digit positions of the HP1130-0513 Display module:

Note: The TMS0603 chip outputs in the unused Digit Positions D2 the position of the decimal point and D1 the value of Digit 7 of the number stored in the Memory.

The Output Decoder PLA of the TMS0603NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Flag-Information: The TMS0603 is outputting on its Segment H Output the status of internal internal Flags during the Digit Times D1 to D11 that can be used for external Indicator LEDs and and debug purposes:

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz with the Digits and Segments blanked at State S1 and State S13:

TMS0604NC

Device-under-Test:

Keyboard: The Dittel TMP608 makes use of a keyboard with 23 snap action switches arranged in an 11*3 matrix with the rows connected to the D1-D11 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KP (Keyboard Scan Decimal Point) Inputs of the TMS0604NC single-chip calculator circuit. The [∑] switch to activate the Auto-Summation feature is connected between the D3 Output and the KQ (Keyboard Scan Constant) Input and the [K] switch to activate the Constant Mode is connected between D10 and KQ.

Keyboard Matrix of the Dittel TMP608:

Display: The Dittel TMP608 makes use of three Litronix DL330 Three-Digit Calculator Numeric Seven-Segment LED Display modules.

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMS0604NC are not connected directly to the physical Digit positions of the Litronix DL330 Display modules:

Note: The TMS0604 chip outputs in the unused Digit Positions D2 the position of the decimal point and D1 the value of Digit 8 of the number stored in the Memory.

The Output Decoder PLA of the TMS0604NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Flag-Information: The TMS0604 is outputting on its Segment H Output the status of internal internal Flags during the Digit Times D1 to D11 that can be used for external Indicator LEDs and and debug purposes:

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz with the Digits and Segments blanked at State S1 and State S13:

TMC0605NC

Device-under-Test:

Keyboard: The keyboard assembly of the Canon LE-81M uses spring-supported plastic keys pushing a small conductive rubber element against two contacts etched on a single-sided phenolic PCB combining both long-travel keys with reasonable manufacturing costs while maintaining longevity of the calculator. The keyboard module is connected with a short 20-pin flat-cable to the Main-PC. The switches are arranged in a 10*3 matrix with the rows connected to the D1-D10 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KP (Keyboard Scan Decimal Point) Inputs of the TMC0605NC single-chip calculator circuit. The [AM] switch to activate the Auto-Summation feature is connected between the D14 Output and the KQ (Keyboard Scan Constant) Input.

Keyboard Matrix of the Canon LE-81M:

Display: The Canon LE-81M makes use of a Bowmar Optostic R7H-122-9 Nine-Digit display module using Chip-on-Board (COB) technology with each character formed by bonding seven individual Segment chips and one Comma chip bonded directly to a PCB and protected with a red plastic lens. The display module is connected with a long 17-pin flat-cable to the Main-PCB.

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMC0605NC are not connected directly to the physical Digit positions of the Bowmar Optostic R7H-122-9 Display module:

Note: The TMC0605 chip outputs in the unused Digit Positions D2 the position of the decimal point and D1 the value of Digit 8 of the number stored in the Memory.

The Output Decoder PLA of the TMC0605NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Flag-Information: The TMC0605 is outputting on its Segment H Output the status of internal internal Flags during the Digit Times D1 to D11 that can be used for external Indicator LEDs and and debug purposes:

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz with the Digits blanked at State S1 and State S13 but no Segment blanking:

TMS0611NC

Device-under-Test:

Keyboard: The Craig Model 4518 makes use of a keyboard with individual long-stroke push-button switches arranged in an 11*3 matrix with the rows connected to the D1-D11 Outputs (Display Scan) and the columns connected to the KN (Keyboard Scan Numerical), KO (Keyboard Scan Operational) and KP (Keyboard Scan Decimal Point) Inputs of the TMS0611NC single-chip calculator circuit.

Keyboard Matrix of the Craig Model 4518:

Display: The Craig Model 4518 makes use of nine Fairchild FND357 Seven-Segment displays soldered onto a small Display-PCB.

Display Layout:

The Digit Outputs D11 (leftmost Digit) to D1 (right most Digit) of the TMS0611NC are not connected directly to the physical Digit positions of the nine Fairchild FND357 Seven-Segment displays:

Note: The TMS0611 chip outputs in the unused Digit Positions D2 the position of the decimal point and D1 the value of Digit 8 of the number stored in the Memory.

The Output Decoder PLA of the TMS0611NC is programmed for 7-Segment displays with the following Output Assignments:

Display Fonts:

Note: The display of the Craig Model 4518 calculator does not use Segment H.

Scanning: Display and keyboard scanning is performed in D11 → D1 direction at a rate of about 584 Hz with the Digits and Segments blanked at State S1 and State S13: