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WM8972LEFL/R 数据表(PDF) 26 Page - Wolfson Microelectronics plc

部件名 WM8972LEFL/R
功能描述  MONO CODEC FOR PORTABLE AUDIO APPLICATIONS
PDF  49 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8972LEFL/R 数据表(HTML) 26 Page - Wolfson Microelectronics plc

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WM8972L
Preliminary Technical Data
w
PTD Rev 2.2 June 2004
26
ANALOGUE OUTPUTS
OUT+/OUT- OUTPUTS
The OUT+ and OUT- output pins are independently controlled and can drive an 8
Ω mono speaker
(see Speaker Output section). For speaker drive, the OUT- signal must be inverted (OUTINV = 1), so
that the two signals are mixed to mono in the speaker [OUT+ – (-OUT-) = OUT+ + OUT-].
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
6:0
+OUTVOL
[6:0]
1111001
(0dB)
OUT+ Volume
1111111 = +6dB
… (80 steps)
0110000 = -67dB
0101111 to 0000000 = Analogue MUTE
7
+OZC
0
OUT+ zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
R40 (28h)
OUT+
Volume
8
+OVU
0
OUT+ Volume Update
0 = Store +OUTVOL in intermediate
latch (no gain change)
1 = Update gains
6:0
-OUTVOL
[6:0]
1111001
(0dB)
OUT- Volume
1111111 = +6dB
… (80 steps)
0110000 = -67dB
0101111 to 0000000 = Analogue MUTE
7
-OZC
0
OUT- zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
R41 (29h)
OUT-
Volume
8
-OVU
0
OUT- Volume Update
0 = Store -OUTVOL in intermediate latch
(no gain change)
1 = Update gains
R24 (18h)
Additional
Control (2)
4
OUTINV
0
OUT- Invert
0 = No Inversion (0
° phase shift)
1 = Signal inverted (180
° phase shift)
Table 18 OUT+/OUT- Volume Control
MONO OUTPUT
The MONOOUT pin can drive a mono line output. The signal volume on MONOOUT can be adjusted
under software control by writing to MONOOUTVOL.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
6:0
MONOOUT
VOL [6:0]
1111001
(0dB)
MONOOUT Volume
1111111 = +6dB
… (80 steps)
0110000 = -67dB
0101111 to 0000000 = Analogue MUTE
R42 (2Ah)
MONOOUT
Volume
7
MOZC
0
MONOOUT zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
Table 19 MONOOUT Volume Control



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