ML22Q553-NNNMB Datasheet, PDF (47/69 Pages) List of Unclassifed Manufacturers – 4-Channel Mixing Speech Synthesis LSI

FEDL22Q553-02
ML22Q553
14. RDSTAT command
x command
1011
0
0
0 ERR
The RDSTAT command enables reading the status of internal operation. It is possible to input the CLOOP
command regardless of the status of the NCR signal during playback, but a prescribed command interval needs
taking.
The ERR bit selects reading the playback status for each channel or reading the status of the fail-safe function.
Keep the SI pin to “L” when read the status.
ERR
0
1
Content of data to read
NCR and BUSYB signals for each channel (Initial value)
Status of the fail-safe function
If the ERR bit is set to ”0”, the following status will be read:
Output bit
D7
D6
D5
Output
data
BUSYB3 BUSYB2 BUSYB1
D4
BUSYB0
D3
NCR3
D2
NCR2
D1
NCR1
D0
NCR0
When the ERR bit = ”0”, the NCR and BUSYB signals of each channel are read. The NCR signal outputs a
“L” level while this LSI is performing command processing and goes to a “H” level when the LSI enters a
command waiting state. The BUSY signal outputs a “L” level during voice playback.
The table below shows the contents of each data output at a status read.
Output status signal
BUSY3
Channel 3 BUSYB output
BUSY2
Channel 2 BUSYB output
BUSY1
Channel 1 BUSYB output
BUSY0
Channel 0 BUSYB output
NCR3
Channel 3 NCR output
NCR2
Channel 2 NCR output
NCR1
Channel 1 NCR output
NCR0
Channel 0 NCR output
If the ERR bit is set to ”1”, the following status will be read:
Output bit D7 D6 D5 D4 D3
D2
Output data 0
0
0
0
0
TSDERR
D1
BLDERR
D0
WCMERR
When the ERR bit = ”1”, the status of each fail-safe function is read. If any of the following three fail-safe
functions is activated, the ERR pin is set to a “H” level and the corresponding error bit is set to “1”. If the ERR
pinis set to a “H” level, check the error contents using the RDSTAT command and take appropriate measures.
Error signal
Error contents
TSDERR
BLDERR
WCMERR
High temperature error bit.
This bit is set to “1” if the temperature of the LSI reaches or exceeds the temperature set by the
SAFE command. For details see the section on the SAFE command.
Power supply voltage error bit.
This bit is set to “1” if the power supply voltage level reaches or falls below the voltage set by
the SAFE command. For details see the section on the SAFE command.
Command tansfer errro bit.
This bit is set to “1” if a transfer error occurs in two-time command input mode.
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