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WM8974 датащи(PDF) 44 Page - Wolfson Microelectronics plc

номер детали WM8974
подробное описание детали  MONO CODEC WITH SPEAKER DRIVER
PDF  63 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8974 датащи(HTML) 44 Page - Wolfson Microelectronics plc

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WM8974
Product Preview
w
PP Rev 1.1 September 2004
44
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0
MS
0
Sets the chip to be master over FRAME
and BCLK
0=BCLK and FRAME clock are inputs
1=BCLK and FRAME clock are outputs
generated by the WM8974 (MASTER)
4:2
BCLKDIV
000
Configures the BCLK and FRAME output
frequency, for use when the chip is
master over BCLK.
000=divide by 1 (BCLK=MCLK)
001=divide by 2 (BCLK=MCLK/2)
010=divide by 4
011=divide by 8
100=divide by 16
101=divide by 32
110=reserved
111=reserved
7:5
MCLKDIV
010
Sets the scaling for either the MCLK or
PLL clock output (under control of
CLKSEL)
000=divide by 1
001=divide by 1.5
010=divide by 2
011=divide by 3
100=divide by 4
101=divide by 6
110=divide by 8
111=divide by 12
R6
Clock
generation
control
8
CLKSEL
1
Controls the source of the clock for all
internal operation:
0=MCLK
1=PLL output
Table 31 Clock Control
LOOPBACK
Setting the LOOPBACK register bit enables digital loopback. When this bit is set the output data
from the ADC audio interface is fed directly into the DAC data input.
COMPANDING
The WM8974 supports A-law and
µ-law companding on both transmit (ADC) and receive (DAC)
sides. Companding can be enabled on the DAC or ADC audio interfaces by writing the appropriate
value to the DAC_COMP or ADC_COMP register bits respectively.



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