WTS701EF WINBOND [Winbond], WTS701EF Datasheet - Page 43

• Manufacturer Part Number: WTS701EF
• Description: WINBOND SINGLE-CHIP TEXT-TO-SPEECH PROCESSOR
• Manufacturer: WINBOND [Winbond]

Configuration
After power-on or a Reset command (RST) the WTS701 processor can be configured for operation.
This involves initializing the internal configuration registers for the users requirements.
After configuration, the WTS701 is ready for text-to-speech conversion. Because of the real-time
nature of speech, some form of flow control is necessary to inform the host system:
The CONVERT state is entered by sending a CONV command along with some textual data. The
WTS701 has an internal 256-byte buffer to accept text data. The R/ B signal (both the hardware line
and the status bit) will become active (LOW):
When R/ B becomes active the user may:
1. When the device is ready for more text data
2. When the device has finished converting text
3. When the device can release the audio interface
1. When the internal buffer is full
2. If the host sends data at a rate too fast for the WTS701 to process it to the internal buffer
1. Wait for the R/ B pin to return to the (HIGH) ready state
2. Terminate the SPI transaction until a later time and resend the data
POWER DOWN
IDLE
7.4.5 Initialization and Configuration
7.4.6 Converting Text
State
SCLC
PWUP
SCOM
SCOD
SAUD
SVOL
SSPD
SPTC
--------
Command
Table 11. Initialization Commnad Sequence
State after power-on or RST command.
Set clock configuration.
Power up device.
Set up communication register to enable interrupts.
Set up CODEC configuration (if used).
Set up audio control register.
Set the initial volume level.
Set the initial speech output speed level.
Set the initial speech pitch level.
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Description
Publication Release Date: May 2003
WTS701
Revision 3.09