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WM8904ECS/R 数据表(PDF) 142 Page - Wolfson Microelectronics plc

部件名 WM8904ECS/R
功能描述  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R 数据表(HTML) 142 Page - Wolfson Microelectronics plc

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WM8904
Pre-Production
w
PP, Rev 3.3, September 2012
142
REGISTER BITS BY ADDRESS
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R0 (00h)
SW Reset
and ID
15:0
SW_RST_DEV
_ID1 [15:0]
1000_1001
_0000_010
0
Writing to this register resets all registers to their default
state.
Reading from this register will indicate Device ID
8904h.
Software Reset
and Chip ID
Register 00h SW Reset and ID
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R4 (04h)
Bias Control
0
3:2
ISEL [1:0]
10
Master Bias Control
00 = Low power bias
01 = Reserved
10 = High performance bias (default)
11 = Reserved
Note that the ISEL register should only be changed as
part of the Low Power Mode Enable/Disable
sequences.
Reference
Voltages and
Master Bias
0
BIAS_ENA
0
Enables the Normal bias current generator (for all
analogue functions)
0 = Disabled
1 = Enabled
Reference
Voltages and
Master Bias
Register 04h Bias Control 0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R5 (05h)
VMID
Control 0
6
VMID_BUF_EN
A
0
Enable VMID buffer to unused Inputs/Outputs
0 = Disabled
1 = Enabled
Analogue Outputs
2:1
VMID_RES
[1:0]
00
VMID Divider Enable and Select
00 = VMID disabled (for OFF mode)
01 = 2 x 50k divider (for normal operation)
10 = 2 x 250k divider (for low power standby)
11 = 2 x 5k divider (for fast start-up)
Analogue Outputs
0
VMID_ENA
0
VMID Buffer Enable
0 = Disabled
1 = Enabled
Analogue Outputs
Register 05h VMID Control 0



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