wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 122
wm8903
Manufacturer Part Number
wm8903
Description
Ultra Low Power Codec For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8903.pdf
(158 pages)
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WM8903
Register 15h Clock Rates 1
R22 (16h)
Clock Rates
2
Register 16h Clock Rates 2
w
REGISTER
REGISTER
ADDRESS
ADDRESS
BIT
9:8
3:0
BIT
2
1
0
CLK_SYS_MODE[1:0]
CLK_SYS_ENA
CLK_DSP_ENA
SAMPLE_RATE[3:0]
TO_ENA
LABEL
LABEL
DEFAULT
0
0
0
DEFAULT
1000
00
System Clock enable
0 = Disabled
1 = Enabled
DSP Clock enable
0 = Disabled
1 = Enabled
Zero Cross timeout enable
0 = Disabled
1 = Enabled
1010 to 1111 = Reserved
if CLK_SYS_MODE = 10 (250*fs related clocks)
0000 = 125*fs
0001 = 125*fs
0010 = 250*fs
0011 = 250*fs
0100 = 375*fs
0101 = 500*fs
0110 = 750*fs
0111 = 1000 *fs
1000 = 1000*fs
1001 = 1500*fs
1010 to 1111 = Reserved
CLK_SYS mode
00 = 256*fs related
01 = 272*fs related
10 = 250*fs related
11 = Reserved
Selects the Sample Rate (fs)
0000 = 8kHz
0001 = 11.025kHz
0010 = 12kHz
0011 = 16kHz
0100 = 22.05kHz
0101 = 24kHz
0110 = 32kHz
0111 = 44.1kHz
1000 = 48kHz
1001 = 88.2kHz (Not available for Digital
Microphone. Not used for 88.2kHz ADC.)
1010 = 96kHz (Not available for Digital
Microphone. Not used for 96kHz ADC).
1011 to 1111 = Reserved
If the desired sample rate is not listed in this
table, then the closest alternative should be
chosen.
DESCRIPTION
DESCRIPTION
PP, Rev 3.1, August 2009
Pre-Production
122