ASAHI KASEI
[AK4564]
Output Digital ATT Control
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
0CH
ZCE
1
OATT6 OATT5 OATT4 OATT3 OATT2 OATT1 OATT0
Output Digital ATT Control
Default
1
0
1
1
0
0
0
ZCE: OATT Zero Crossing Enable Flag
0: Disable
1: Enable (Default)
OATT6•0: Output Digital Volume; 89 Level, 0dB ~ •65.25dB & Mute, 0.75dB step
This volume includes zero crossing detection circuit. When ZCE is “1”, the change of volume is detected
by zero crossing independently. Zero crossing timeout period is set by TM1-0 and FSTM bits.
When ZCE is “0”, the OATT is changed immediately.
DATA(HEX)
58H
ATT Level
0dB
Default
57H
56H
-0.75dB
-1.5dB
·
·
3DH
3CH
3BH
-20.25dB
-21.0dB
-21.75dB
·
·
03H
02H
01H
-63.75dB
-64.5dB
-65.25dB
00H
MUTE
Table 25. Attenuation value of Output Digital Volume
MS0140-E-01
2002/07
- 45 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
