DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-83 Plus.fr (Design Validations Tests)
|Date of introduction:||Never||Display technology:||LCD dot matrix|
|New price:||Display size:||8 * 16 characters|
|Size:|| 7.5" x 3.3" x
190 x 84 x 22 mm3
|Weight:||7.4 ounces, 208 grams||Serial No:||DVT-117|
|Batteries:||4*AAA + SR44 (35mA)||Date of manufacture:||mth 12 year 2012|
|AC-Adapter:||Origin of manufacture:||China (K)|
|Precision:||14||Integrated circuits:|| ASIC: TI-REF 84PLCR/TA1
Display: Novatek NT7564H
|Program steps:||24k Bytes, 480k Bytes Flash ROM||Courtesy of:||Xavier Andréani|
This TI-83 Plus.fr with the serial number DVT-117 was used for Design Validation Tests (DVT - learn more about the Five Engineering Stages) of the later TI-83 Plus.fr introduced in June 2013.
Compared with the original TI-83
Plus.fr introduced already in 2008 sports this design the housing of the
TI-84 Plus Silver Edition with its
snap-on faceplates. We know a similar story
with the TI-73 Explorer introduced in 2006
and its successor TI-73 Explorer from
Dismantling this TI-83 Plus.fr Prototype manufactured in December 2012 by Kinpo Electronics, Inc. reveals a design using the components and Operating System of the recent TI-84 Plus:
|• TI-REF84PLCR/TA1: Z80 microprocessor, RAM, USB-Port
and supporting logic
• Macronix MX29L800A: 1M Bytes Flash ROM
• Novatek NT7564H: Single-chip 64*120 pixel display driver
picture on the right gives an enhanced view of the ASIC that clocks the internal Z80
microprocessor with 15 MHz and incorporates the RAM, USB-Port and logic. Learn more about the Hardware Architecture of TI’s Graphing Calculators. Please
notice the smaller package of the new TI-REF 84PLCR/TA1 ASIC compared with the
previous TI-REF 83PLUSB/TA2 or TI-REF 84PLUSB/TA3 found in the TI-84 Plus family
manufactured between 2004 and 2007.
Recently members of the Graphing Calculator Programming community under the lead of Xavier Andréani made a very interesting discovery:
|• All TI-84 Plus / S.E. with the TA2 or TA3 ASIC have access
to 128k Bytes RAM.
• All TI-84 Plus / S.E. with the TA1 ASIC have access to only 48k Bytes RAM using
the same assembly commands.
TI-83 Plus.fr Prototype manufactured in December 2012 makes use of
one Macronix Flash-ROM with 1M Bytes capacity while the final product sports 2M
The driver circuit of the LC-Display was traditionally manufactured by Toshiba for Texas Instruments' graphing calculators. This TI-83 Plus.fr manufactured in 2012 shows with the Novatek NT7564H a one-by-one replacement. It is just a bare chip mounted on a flexible piece of circuit board attached between the display and the main PCB.
A serial port of the calculators allows the connection to the Calculator-Based Laboratory system CBL, its successor CBL 2, the Calculator-Based Ranger CBR and its successor CBR 2.
2.55MP (January 11, 2011, actual in May 2013)
You can check the ROM version of your TI-83 Plus.fr using the following key sequence and reading the number on your screen:
[2nd] [MEM] 
Information provided by ticalc.org and Xavier Andréani.
The TI-83 Plus.fr is permitted (as of May 30, 2013) for use on SAT, ACT, PSAT and AP exams.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, May 31, 2013. No reprints without written permission.