DATAMATH CALCULATOR MUSEUM
of the early TI-Nspire CAS+ prototype looks similar to the released
product but sports a strange color.
|The 4 AAA-sized
batteries of the TI-Nspire CAS+
are accessible from the backside of the calculator.
learned how to read the label of this early
TI-Nspire CAS+ protoype:
Engineering Validation Test, Second Series, Serial #135.
construction of the TI-Nspire CAS+ makes use of just 3 printed circuit boards
one for the gray-scale LC-Display and power supply, one for the computing unit and the keyboard.
|The frontside of the
PCBs reveal the construction of the 240 * 320 pixel gray-scale
LC-Display, the TI-OMAP and a total of three different memory chips.
|The brain of the
TI-Nspire CAS+ prototype is actually a System-on-Chip based on the OMAP architecture from
Texas Instruments. We assume that the tiny housing hosts a 78 MHz ARM9 32-bit RISC processor.
CAS+ uses three
different memory chips, a 256k*16 NOR Flash-ROM, 32M Bytes
and 16M*16 SDRAM. The clock frequency of the SoC is 12 MHz.
|The 320 *
240 pixel gray-scale LC-Display needs a total of three drivers.
We located this Novatek NT7702 row-driver.
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© Joerg Woerner, October 22, 2007. No reprints without written permission.