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WM8948ECS/R Datenblatt(PDF) 114 Page - Wolfson Microelectronics plc

Teilenummer WM8948ECS/R
Bauteilbeschribung  Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller
PDF  189 Pages
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Hersteller  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8948ECS/R Datenblatt(HTML) 114 Page - Wolfson Microelectronics plc

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WM8948
Production Data
w
PD, May 2011, Rev 4.1
114
ACTION
LABEL
REGISTER [BITS]
STARTUP_BIAS_ENA = 0
R7 (07h) [8]
Set VMID divider for normal operation
VMID_SEL = 01
R2 (02h) [1:0]
Power Down:
ACTION
LABEL
REGISTER[BITS]
Mute speaker PGA and DAC
SPKR_PGA_ENA = 1
SPKL_PGA_ENA = 1
SPKR_VOL = 00h
SPKL_VOL = 00h
DACR_MUTE = 1
DACL_MUTE = 1
DACR_VOL = 0
DACL_VOL = 0
R3 (03h) [13]
R3 (03h) [12]
R47 (2Fh) [5:0]
R48 (30h) [5:0]
R24 (18h) [8]
R23 (17h) [8]
R24 (18h) [7:0]
R23 (17h) [7:0]
Select LDO for fast start-up
LDO_REF_SEL_FAST = 1
LDO_BIAS_SRC = 1
R53 (35h) [14]
R53 (35h) [5]
Select VMID for fast start-up
VMID_SEL = 11
VMID_FAST_START =1
BIAS_SRC = 1
VMID_RAMP = 01
R2 (02h) [1:0]
R7 (07h) [11]
R7 (07h) [7]
R7 (07h) [6:5]
Disabled VMID
Delay 500ms for VMID to discharge
VMID_ENA = 0
R7 (07h) [4]
Discharge outputs
Delay 50ms for outputs to discharge
SPKR_DISCH = 1
SPKL_DISCH = 1
LINER_DISCH = 1
LINEL_DISCH = 1
R42 (2Ah) [7]
R42 (2Ah) [6]
R42 (2Ah) [5]
R42 (2Ah) [4]
Mute outputs
LINER_MUTE = 1
LINEL_MUTE = 1
SPKR_OP_MUTE = 1
SPKL_OP_MUTE = 1
R42 (2Ah) [9]
R42 (2Ah) [8]
R03 (03h) [9]
R03 (03h) [8]
Disable power to speaker driver (must be
done before disabling the speaker
outputs)
SPKR_SPKVDD_ENA = 1
SPKL_SPKVDD_ENA = 1
R3 (03h) [11]
R3 (03h) [10]
Disable speaker outputs
SPKN_OP_ENA = 1
SPKP_OP_ENA = 1
R3 (03h) [7]
R3 (03h) [6]
Reset
SW_RESET
R0 (00h) [15:0]
Turn off external power supply voltages



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