AK4620BVFP-E2 Datasheet, PDF (33/42 Pages) List of Unclassifed Manufacturers – 24-Bit 192kHz Audio CODEC with IPGA

ASAHI KASEI
[AK4620B]
Addr
04H
05H
Register Name
Lch IPGA Control
Rch IPGA Control
DEFAULT
D7
IPGL7
IPGR7
1
D6
IPGL6
IPGR6
0
D5
IPGL5
IPGR5
0
D4
IPGL4
IPGR4
0
D3
IPGL3
IPGR3
0
D2
IPGL2
IPGR2
0
D1
IPGL1
IPGR1
0
D0
IPGL0
IPGR0
0
IPGL/R7-0: ADC Input Gain Level
Refer to Table 10
Default: 80H (0dB)
The AK4620B includes two channel-independent analog volumes (IPGA), each with 32 levels in 0.5dB increments.
These are located in front of the ADC while digital volume controls (IATT) with 128 levels (including MUTE) are
located after the ADC. Control of both of these volume settings is handled by the same register address (04H for L-ch,
05H for R-ch). When the MSB of the register is “1”, the IPGA changes and when the MSB= “0” the IATT changes. 80H
is the crossover point of the IPGA and DATT, and both IPGA/IATT are set to 0dB.
The IPGAs are set to “00H” when the PDN pin goes “L”. After returning to “H”, the IPGAs fade in the default value,
“80H” by 531(1/fs) cycles. The IPGAs are set to “00H” when PWAD goes “0”. After returning to “1”, the IPGAs fade in
the current value, but the ADC output is “0” during the first 516(1/fs) cycles. The IPAGs are set to “00H” when RSTAD
goes “0”. After returning to “1”, the IPGAs fade in to the current value, but the ADC outputs “0” during the first 516(1/fs)
cycles. IATTs can be controlled in differential mode.
Data
FFH ~ A5H
A4H
A3H
:
82H
81H
80H
7FH
7EH
:
02H
01H
00H
Analog
Volume (dB)
+18
+18
+17.5
:
+1.0
+0.5
0
0
0
:
0
0
0
Digital
ATT (dB)
Total Gain (dB)
Step width
(dB)
0
+18
-
0
+18
-
0
+17.5
0.5
:
:
:
0
+1.0
0.5
0
+0.5
0.5
0
0
0.5
-0.5
-0.5
0.5
-1.0
-1.0
0.5
:
:
:
-63.0
-63.0
0.5
-63.5
-63.5
0.5
MUTE
MUTE
Table 10. IPGA code table
IPGA
Analog volume with 0.5dB/step
IATT
Digital volume with 0.5dB/step.
Soft-changes between each level.
Addr
06H
07H
Register Name
Lch OATT Control
Rch OATT Control
DEFAULT
D7
ATTL7
ATTR7
1
D6
ATTL6
ATTR6
1
D5
ATTL5
ATTR5
1
D4
ATTL4
ATTR4
1
D3
ATTL3
ATTR3
1
D2
ATTL2
ATTR2
1
D1
ATTL1
ATTR1
1
D0
ATTL0
ATTR0
1
ATT7-0:
Attenuation Level
ATT = 20 log₁₀ (ATT_DATA / 255) [dB]
FFH : 0dB (Default)
00H : Mute
MS0401-E-00
- 33 -
2005/07