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WM8281ECS/R 데이터시트(PDF) 192 Page - Cirrus Logic

부품명 WM8281ECS/R
상세설명  Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation
PDF  392 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8281ECS/R 데이터시트(HTML) 192 Page - Cirrus Logic

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WM8281
192
Rev 4.0
OUTPUT SIGNAL PATH DIGITAL VOLUME LIMIT
A digital limit control is provided on each of the output signal paths. Any signal which exceeds the
applicable limit will be clipped at that level. The limit control is implemented in the digital domain,
before the output path DACs.
For typical applications, a limit of 0dBFS is recommended for the analogue output paths (OUT1,
OUT2, OUT3 and OUT4).
The digital speaker outputs (OUT5 and OUT6) can handle signal levels up to +3dBFS; a maximum
setting of +3dBFS is recommended for these output paths.
Caution is advised when selecting other limits, as the output signal may clip in the digital and/or
analogue stages of the respective signal path(s)
The digital limit register fields are described in Table 66 and Table 67.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R1042
(0412h
DAC
Volume
Limit 1L
7:0
OUT1L_VOL_LIM
[7:0]
81h
Output Path 1 (Left) Digital Limit
-6dBFS to +6dBFS in 0.5dB steps
00h to 73h = Reserved
74h = -6.0dBFS
75h = -5.5dBFS
… (0.5dB steps)
80h = 0.0dBFS
… (0.5dB steps)
8Bh = +5.5dBFS
8Ch = +6.0dBFS
8Dh to FFh = Reserved
(see Table 67 for limit range)
R1046
(0416h
DAC
Volume
Limit 1R
7:0
OUT1R_VOL_LI
M [7:0]
81h
Output Path 1 (Right) Digital Limit
-6dBFS to +6dBFS in 0.5dB steps
00h to 73h = Reserved
74h = -6.0dBFS
75h = -5.5dBFS
… (0.5dB steps)
80h = 0.0dBFS
… (0.5dB steps)
8Bh = +5.5dBFS
8Ch = +6.0dBFS
8Dh to FFh = Reserved
(see Table 67 for limit range)
R1050
(041Ah
DAC
Volume
Limit 2L
7:0
OUT2L_VOL_LIM
[7:0]
81h
Output Path 2 (Left) Digital Limit
-6dBFS to +6dBFS in 0.5dB steps
00h to 73h = Reserved
74h = -6.0dBFS
75h = -5.5dBFS
… (0.5dB steps)
80h = 0.0dBFS
… (0.5dB steps)
8Bh = +5.5dBFS
8Ch = +6.0dBFS
8Dh to FFh = Reserved
(see Table 67 for limit range)



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