AK4564 Datasheet, PDF (45/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
Output Digital ATT Control
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
0CH Output Digital ATT Control ZCE OATT6 OATT5 OATT4 OATT3 OATT2 OATT1 OATT0
Default
1
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) ATT Level
58H
0dB
Default
57H
-0.75dB
56H
-1.5dB
•
3DH
•
-20.25dB
3CH
-21.0dB
3BH
-21.75dB
•
•
03H
-63.75dB
02H
-64.5dB
01H
-65.25dB
00H
MUTE
Table 25. Attenuation value of Output Digital Volume
MS0140-E-01
- 45 -
2002/07