sta381bw STMicroelectronics, sta381bw Datasheet - Page 121

• Manufacturer Part Number: sta381bw
• Description: Sound Terminal 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA381BW
7.6.7
7.7
7.7.1
External amplifier power-down
Table 130. External amplifier power-down
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 131. Line output configuration
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.
Bit
Bit
7
4
LOC1
LOC[1:0]
D7
0
00
01
10
11
R/W
R/W
R/W
R/W
LOC0
D6
0
RST
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
Reserved
0
0
Reserved
D5
0
BQBALL
Name
Doc ID 018835 Rev 2
EAPD
Name
Register description: Sound Terminal compatibility
BQBALL
D4
0
Global Biquad Bypass
0: Biquad filters active
1: All the Biquad filters are bypassed (pass-through)
Line output configuration
0: External power stage power-down active
1: Normal operation
C3M
D3
0
Description
C2M
Description
D2
0
C1M
D1
0
MMUTE
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D0
0