STA323W ST Microelectronics, STA323W Datasheet - Page 23

• Manufacturer Part Number: STA323W
• Description: 2.1 High Efficiency Digital Audio System
• Manufacturer: ST Microelectronics

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Table 17. Channel Volume as a function of CxV (7..0)
7.9 AUTOMODE REGISTERS
7.9.1 Register – AutoModes EQ, Volume, GC (Address 0Bh)
Table 18. AutoMode EQ
By setting AMEQ to any setting other than 00 enables AutoMode EQ. When set, biquads 1-4 are not user
programmable. Any coefficient settings for these biquads will be ignored. Also when AutoMode EQ is used
the pre-scale value for channels 1-2 becomes hard-set to –18dB.
Table 19. AutoMode Volume
AMPS
4
D7
1
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11111110 (FEh)
11111111 (FFh)
00000000 (00h)
00000001 (01h)
00000010 (02h)
01100001 (5Fh)
01100000 (60h)
01011111 (61h)
AMEQ (1,0)
CxV (7..0)
AMV (1,0)
00
01
10
11
00
01
10
11
…
…
D6
AMGC1
D5
0
User Programmable
Preset EQ – PEQ bits
Auto Volume Controlled Loudness Curve
Not used
MVOL 0.5dB 256 Steps (Standard)
MVOL Auto Curve 30 Steps
MVOL Auto Curve 40 Steps
MVOL Auto Curve 50 Steps
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AMGC0
D4
0
AMV1
D3
0
Hard Channel Mute
Mode (Biquad 1-4)
Mode (MVOL)
+47.5dB
-79.5 dB
Volume
+0.5dB
-0.5dB
+48dB
+47dB
0dB
AMV0
…
…
D2
0
AMEQ1
D1
0
STA323W
AMEQ0
D0
0
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