sta339bw STMicroelectronics, sta339bw Datasheet - Page 45

• Manufacturer Part Number: sta339bw
• Description: 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA339BW
6.6.7
6.7
6.7.1
6.7.2
6.7.3
6.7.4
External amplifier power down
Table 51.
The EAPD register directly disables/enables the internal power circuitry.
When EAPD = 0, the internal power section is placed on a low-power state (disabled). This
register also controls the FFX4B/EAPD output pin when OCFG = 10.
Volume control registers (addr 0x06 - 0x0A)
Mute/line output configuration register
Table 52.
Line output is only active when OCFG = 00. In this case LOC determines the line output
configuration. The source of the line output is always the channel 1 and 2 inputs.
Master volume register
Channel 1 volume
Channel 2 volume
7
00
01
10
Bit
LOC1
C1V7
C2V7
MV7
LOC[1:0]
D7
D7
D7
D7
0
1
0
0
R/W
R/W
External amplifier power down
Line output configuration
LOC0
C1V6
C2V6
MV6
D6
D6
D6
D6
0
1
1
1
0
RST
Line output fixed - no volume, no EQ
Line output variable - CH3 volume effects line output, no EQ
Line output variable with EQ - CH3 volume effects line output
EAPD
C1V5
C2V5
MV5
D5
D5
D5
D5
0
1
1
1
Doc ID 15251 Rev 4
Name
Reserved
C1V4
C2V4
MV4
D4
D4
D4
D4
0
1
0
0
Line output configuration
0: External power stage power down active
1: Normal operation
C1V3
C2V3
C3M
MV3
D3
D3
D3
D3
0
1
0
0
C1V2
C2V2
C2M
MV2
Description
D2
D2
D2
D2
0
1
0
0
Register description
C1V1
C2V1
C1M
MV1
D1
D1
D1
D1
0
1
0
0
MMUTE
C1V0
C2V0
MV0
D0
D0
D0
D0
0
1
0
0
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