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WM8903 Datasheet(PDF) 125 Page - Wolfson Microelectronics plc

Part # WM8903
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  178 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 125 Page - Wolfson Microelectronics plc

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Production Data
WM8903
w
PD, Rev 4.5, June 2012
125
SHUTDOWN SEQUENCE
The Shutdown sequence is initiated by writing 0120h to Register R111 (6Fh). This single operation
starts the Control Write Sequencer at Index Address 32 (20h) and executes the sequence defined in
Table 80.
For typical clocking configurations with MCLK=12.288MHz, this sequence takes approximately 325ms
to run.
WSEQ
INDEX
REGISTER
ADDRESS
WIDTH
START
DATA
DELAY
EOS
DESCRIPTION
32 (20h)
R94 (5Eh)
8 bits
Bit 0
77h
0h
0b
LINEOUTL_RMV_SHORT = 0
LINEOUTR_RMV_SHORT = 0
(delay = 0.5625ms)
33 (21h)
R90 (5Ah)
8 bits
Bit 0
77h
0h
0b
HPL_RMV_SHORT = 0
HPR_RMV_SHORT = 0
(delay = 0.5625ms)
34 (22h)
R90 (5Ah)
8 bits
Bit 0
00h
0h
0b
HPL_ENA_OUTP = 0
HPL_ENA_DLY = 0
HPL_ENA = 0
HPR_ENA_OUTP = 0
HPR_ENA_DLY = 0
HPR_ENA = 0
(delay = 0.5625ms)
35 (23h)
R94 (5Eh)
8 bits
Bit 0
00h
0h
0b
LINEOUTL_ENA_OUTP = 0
LINEOUTL_ENA_DLY = 0
LINEOUTL_ENA = 0
LINEOUTR_ENA_OUTP = 0
LINEOUTR_ENA_DLY = 0
LINEOUTR_ENA = 0
(delay = 0.5625ms)
36 (24h)
R67 (43h)
4 bits
Bit 0
00h
0h
0b
DCS_ENA = 0000
(delay = 0.5625ms)
37 (25h)
R98 (62h)
1 bit
Bit 0
00h
0h
0b
CP_ENA = 0
(delay = 0.5625ms)
38 (26h)
R18 (12h)
2 bits
Bit 2
00h
0h
0b
DACL_ENA = 0
DACR_ENA = 0
(delay = 0.5625ms)
39 (27h)
R22 (16h)
1 bit
Bit 1
00h
0h
0b
CLK_DSP_ENA = 0
(delay = 0.5625ms)
40 (28h)
R14 (0Eh)
2 bits
Bit 0
00h
0h
0b
HPL_PGA_ENA = 0
HPR_PGA_ENA = 0
(delay = 0.5625ms)
41 (29h)
R15 (0Fh)
2 bits
Bit 0
00h
0h
0b
LINEOUTL_PGA_ENA = 0
LINEOUTR_PGA_ENA = 0
(delay = 0.5625ms)
42 (2Ah)
R13 (0Dh)
2 bits
Bit 0
00h
0h
0b
MIXOUTL_ENA = 0
MIXOUTR_ENA = 0
(delay = 0.5625ms)
43 (2Bh)
R4 (04h)
1 bit
Bit 0
00h
0h
0b
BIAS_ENA = 0
(delay = 0.5625ms)
44 (2Ch)
R5 (05h)
2 bits
Bit 3
02h
0h
0b
VMID_SOFT = 10
(delay = 0.5625ms)
45 (2Dh)
R5 (05h)
1 bit
Bit 0
00h
Ch
0b
VMID_BUF_ENA = 0
(delay = 256.5ms)
46 (2Eh)
R5 (05h)
1 bit
Bit 0
00h
9h
0b
VMID_BUF_ENA = 0



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