WTS701MMSLASHT datasheet(44/77 Pages) WINBOND

44 / 77 page

WTS701

- 44 -

The user has the choice of enabling interrupts to signal the host when there is free space in the

internal buffer. When all text data has been sent, the user must indicate this by:

1. Sending a FIN (Finish) command

2. Sending an EOT (ASCII 0x1A) character as the last byte of a CONV command

(MANDARIN UNICODE/Big5 0x00 0x1A)

When conversion has been terminated using either of these commands, another CONV command

cannot be sent until conversion is completed and the chip enters the WAIT state.

Notes

1. Buffer length limit:

The max. character length of a white-space-bounded string is 53. The exceeding characters

will be truncated.

2. Undefined characters:

All the undefined characters will be deleted (prior to the word pronounciation process). The

defined characters range from ‘0x00’ to 0x7A’ excluding ‘0x22’, ‘0x3C’, ‘0x3E’ and ‘0x60’.

Once the WTS701 has synthesized the contents of the text buffer, it will enter the WAIT state. In this

state the audio interface is still active. To disable the audio interface and return to the IDLE state an

IDLE command is sent. The WAIT state can be detected either through polling of the CNVT bit or

enabling of the ICNV interrupt. An example of the flow for a conversion is shown in Figure 11. The

flow here assumes that the COM register is set such that the WTS701 generates an IBUF interrupt at

the 75 percent buffer level (64 free bytes) and that the ICNV interrupt is enabled.

WTS701MM/T 데이터시트(PDF) 44 Page - Winbond