DATAMATH CALCULATOR MUSEUM
Texas Instruments Speak & Spell (English Voice Type 3)
|Date of introduction:||1986||Display technology:||Fluorescent|
|New price:||Display size:||9 alphanumeric|
|Size:|| 10.0" x 7.0" x 1.3"
254 x 177 x 34 mm3
|Weight:||16.7 ounces, 474 grams||Serial No:|
|Batteries:||4*C cells||Date of manufacture:||wk 14 year 1991|
|AC-Adapter:||AC9199||Origin of manufacture:||USA|
|Precision:||Integrated circuits:||TMC0271, CD2801, CD62175|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 1.8 MByte)|
This Speak & Spell (English Voice) model introduced in 1986 got a slightly changed keyboard design. View the previous design here.
pictured Speak & Spell (English voices) was manufactured in 1991 and
represents the last design iteration of the Speak & Spell family. The printed circuit board (PCB) itself is
much smaller than the
original Speak & Spell design but sports an almost
The main components on the PCB are:
Microcontoller: The microcontroller is derived from the TMS1000 series and adopted to control both the keyboard, the display and to feed the speech synthesizer. This Speak & Spell uses a TMC0271 which interprets as TMC0270, ROM-Code 1.
Speech Synthesizer: The Speak & Spell series uses with the TMC 0280 the first one-chip LPC speech synthesizer. Later refinements to the Speak & Spell chips resulted in the TMS 5100, 5200 and 5220 Voice Synthesis Processors for commercial products. This Speak & Spell uses a CD2801 which interprets as TMC0280, Version 1.
Speech ROM: Speech data is stored in a 128k ROM chip with the designation TMC 0350. This Speak & Spell uses a CD62175 which is actually a double VSM (Voice Speech Memory) with 256k capacity.
There are a lot of differences between American English and British English, therefore Texas Instruments had to change the Speech-ROM's of the original Speak & Spell to sell it on the United Kingdom market.
In 1986 we knew a total of 10 different plug-in modules for
the Speak & Spell, a comprehensive overview including the wordlists could be
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 3, 2007. No reprints without written permission.