ML22Q533 datasheet(34/178 Pages) ROHM

34 / 178 page

FEDL22Q53X-02

ML22Q53X

 Command error detection

This LSI detects two command errors: phrase number error and command error. Use the WCMEN bit of the SAFE

command to set command error detection.

① Phrase number error.

Set the number of phrases (1024, 2048, 3072 or 4096) to use when creating sound data in the Speech LSI Utility. If you

specify a phrase that exceeds the number of phrases specified by the Speech LSI Utility with the PLAY2 or FADR2

command, an error in the command is detected and the error bit (WCMERR) is set to "1".

② Command error.

This LSI has a function to input various commands and data two-times to prevent malfunction due to noise at the serial

interface pin. The setting of the two-times input mode is made at power-up. Refer to the "PUP command" for the setting

method.

In the two-times input mode, the command data is input two-times in succession, and it is valid only when the input data

matches. If a mismatch occurs during the second data input after the first data input, an error in the command is detected and

the error bit (WCMERR) is set to "1", and the command entered is ignored.

Error bit (WCMERR) can be read with RDERR command. Also, error bit (WCMERR) can be cleared by ERRCL command.

*1 Misoperation detection and failure detection outputs are selected by OUTSTAT command.

Command

STATUSn

(n：1 or 2)

WCMERR

Command

1st

Command

2nd

ERRCL command

1st

ERRCL command

2nd

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ML22Q533 Datasheet(PDF) 34 Page - Rohm