WTS701MFSLASHT datasheet(27/77 Pages) WINBOND

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WTS701

Publication Release Date: May 2003

- 27 -

Revision 3.09

PWUP

Class

Type

Host controller

0x02

0x00

Byte Sequence:

WTS701

Status Byte 0

Status Byte 1

Description:

Wake up the WTS701 processor to IDLE state.

CONV

Convert

The convert command starts the text to speech conversion process. The convert command is followed

by ASCII text data. The device has a buffer of 256 bytes. When this buffer is full, the chip pulls the

R/ B line LOW and sets the BFUL bit in the status word indicating that the WTS701 buffer manager is

in the buffer full condition. The WTS701 remains in the buffer full condition until the input buffer has

been emptied of half the buffer space (128 bytes). When the buffer is full, the Host may do one of

three things:

1. The Host may end the command at that point, then poll the BFUL bit of the SPI status register until

it is clear, and then send new CONV commands with the additional ASCII text data.

2. The Host may also continue the command (keep SS LOW) and wait for the R/ B pin to go HIGH.

As each word is processed by the WTS701, space will become free in the buffer and the R/ B pin

will go HIGH until it is full again.

3. The device may also be configured such that it will generate an interrupt to the host when the buffer

threshold (set by RCOM command) has been crossed. (See Tables 3 and 4) This allows the host

to fill the buffer then wait for the Interrupt to send the additional data.

During conversion, the Convert Count Register is updated as each word has been spoken. This

has been terminated.

A convert command is terminated in several ways:

•

Send a finish command (FIN) indicating that the host has finished sending data. In this case,

the device finishes converting the text buffer, then stops and enters a wait state.

•

The conversion process will also stop when the EOT (^D, ASCII 0x1A, UNICODE/Big5 0x00

0x1A) character is part of the input text. When the device detects the EOT character, it will

continue the conversion process until the buffer is emptied and the final word spoken. Then it

will stop and enter the wait state.

•

The finish word command (FINW) will cause the WTS701 device to finish the word currently

being spoken, then flush the buffers and enter the wait state.

WTS701MF/T Datasheet(PDF) 27 Page - Winbond

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