BU9414FV Datasheet, PDF (18/61 Pages) Rohm – 32bit Audio DSP

BU9414FV
Explanation of A_RATE,R_RATE(field transition of (2)<->(3))
Input V_I
Time
T
Technical Note
Field (2)
VOmax
Output V_O
Field (3)
Field (2)
Time
T
Attack operation
A_RATE
The time from exceeding the
attack operation detection level
VＯmax till the attack operation's
transition to Field ( 3 ) is
completed
Recovery operation
R_RATE
The time from falling below the
recovery operation detection
loepveerlatVioＯ_nm_'sax
till the
transition
recovery
to Field
(2) is completed
Setting 1 of attack detection time
A_TIME is the setting of the initiation of P²Volume function’s transition operation. If output level at the time of transiting to
(2)→(3) continues for more then A_TIME time in succession, then the state transition of P²Volume is started.
Default = 0
Select Address
&h39 [ 6:4 ]
command
0
1
2
3
Operational explanation
A_TIME command
0.5ms
4
1ms
5
1.5ms
6
2ms
7
A_TIME
3ms
4ms
5ms
6ms
Setting 1 of recovery detection time
R_TIME is the setting of the initiation of P²Volume function’s transition operation. If output level at the time of transiting to
(3)→(2) continues for more then R_TIME time in succession, then the state transition of P²Volume is started.
Default = 0
Select Address
&h39 [ 2:0 ]
command
0
1
2
3
Operational explanation
R_TIME command
50ms
4
100ms
5
150ms
6
200ms
7
R_TIME
300ms
400ms
500ms
600ms
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18/57
2012.03 - Rev.A