- Narrow 28-pin DIP
- Companion chip to Magnevation SpeakJet or the Savage Innovations SpeakGin
- Built in 600 Rule database convert English text to phoneme codes
- 9600 N81 Baud Serial interface (TTL level)
- Generate speech from ASCII text
- Compatible with Basic Stamp, OOPic, Pic and any processor with a serial port
This item is currently on back order. I will ship any orders around 2/26/2010.
The TTS256 is an 8-bit microprocessor programmed with letter-to-sound rules. This built-in algorithm allows for the automatic real-time translation of English ASCII characters into allophone addresses compatible with the Magnevation SpeakJet Speech Synthesizer IC. Combine this with the SpeakJet to build a complete text-to-speech solution.
| Pin # |
TTS256 |
Pin # |
SpeakJet |
| 5 |
TX (sends serial data to host) |
|
|
| 14 |
Vss (ground) |
|
|
| 18 |
RX (received serial data from host) |
|
|
| 20 |
Ready |
15 |
Buffer Half Full |
| 24 |
SJ_TX |
10 |
RX |
| 28 |
Vdd (+5v) |
|
|
The TTS256 contains over 600 rules for pronouncing English text. While I think it does a pretty good job of the task with a less than 5% error rate in most sentances, I guarantee that it will mispronouce some words. Often times, some creative spelling will help.

TTS256 Datasheet (PDF)
NOTE: There is a error in the datasheet. The correct character to append to the end of text is 0x0D and not 0x0A as listed.