STA323W ST Microelectronics, STA323W Datasheet - Page 26

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

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DataSheet
STA323W
7.10 Channel Configuration Registers
7.10.1Channel 1 Configuration (Address 0Eh)
7.10.2Channel 2 Configuration (Address 0Fh)
7.10.3Channel 3 Configuration (Address 10h)
EQ control can be bypassed on a per channel basis. If EQ control is bypassed on a given channel the
prescale and all 9 filters (high-pass, biquads, de-emphasis, bass management cross-over, bass, treble in
any combination) are bypassed for that channel.
CxEQBP:
Tone control (bass/treble) can be bypassed on a per channel basis. If tone control is bypassed on a given
channel the two filters that tone control utilizes are bypassed.
CxTCB:
Each channel can be configured to output either the patented DDX PWM data or standart binary PWM
encoded data. By setting the CxBO bit to ‘1’, each channel can be individually controlled to be in binary
operation mode.
Also, there is the capability to map each channel independently onto any of the two limiters available within
the STA323W or even not map it to any limiter at all (default mode).
Table 24. Channel Limiter Mapping Selection
Each PWM Output Channel can receive data from any channel output of the volume block. Which channel
a particular PWM output receives is dependent upon that channel’s CxOM register bits.
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– 0 Perform EQ on Channel X – normal operation
– 1 Bypass EQ on Channel X
– 0 Perform Tone Control on Channel x – (default operation)
– 1 Bypass Tone Control on Channel x
C2OM1
C3OM1
C1OM1
4
D7
D7
D7
0
0
U
0
.com
CxLS (1,0)
00
01
10
C2OM0
C3OM0
C1OM0
D6
D6
0
0
D6
0
C2LS1
C3LS1
C1LS1
D5
D5
0
0
Channel has limiting disabled
Channel is mapped to limiter #1
Channel is mapped to limiter #2
D5
0
C2LS0
C3LS0
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C1LS0
D4
D4
0
0
D4
0
C2BO
C3BO
Channel Limiter Mapping
C1BO
D3
D3
D3
0
0
0
C1VBP
C2VBP
C3VBP
D2
D2
D2
0
0
0
C2EQBP
C1EQBP
D1
D1
0
D1
0
C2TCB
C1TCB
D0
D0
0
D0
0
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