FEDL22594-06
ML22594-XXX
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2. AMODE command
command
0
0
0
0
0
1
HPF1
HPF0
1st byte
0
DAG1
DAG0
AIG1 AIG0 DAEN
SPEN
POP
2nd byte
The AMODE command is used to configure various settings for the analog section.
If the PDWN command is input while the analog section is in the power-up state, the analog section enters a
power down state under the setting conditions that were in effect when the analog section was powered up by the
AMODE command. To perform a power-down operation using different conditions from those used at analog
section power-up, set settings by the AMODE command.
To change the setting of DAEN/SPEN while the analog section is in the power-up state, first put the analog
section into the power-down state and then put the analog section into the power-up state again by the AMODE
command.
The detailed command settings are shown below.
Each setting is initialized upon reset release or by the PUP command.
Don’t input the STOP command during the AMODE command is being proccessed (CBUSYB=”L”).
Input the AMODE command for analog section into the power-down state before the PDWN command is input.
The HPF1/HPF0 bits set the cut-off frequency of the HPF.
HPF1
HPF0
Cut-off frequency
0
0
Off (initial value)
0
1
200 Hz
1
0
300 Hz
1
1
400 Hz
The POP bit specifies whether to suppress generation of “pop” noise.
- If the bit is “0” (no pop noise suppression) and the DAEN bit is “1”, the LINE output rises from the DGND
level to the SG level in about 35 ms, at which time the analog section enters the power-up state. If the DAEN
bit is “0”, the LINE output falls from the SG level to the DGND level in about 110 ms, at which time the
analog section enters the power down state.
- If the bit is “1” (with pop noise suppression) and the DAEN bit is “1”, the LINE output rises from the DGND
level to the SG level in about 90 ms, at which time the analog section enters the power-up state. If the DAEN
bit is “0”, the LINE output falls from the SG level to the DGND level in about 140 ms, at which time the
analog section enters the power down state.
POP
Pop noise suppression
0
No (initial value)
1
Yes
