[ꢀPowerꢀDownꢀMode]
[ꢀPowerꢀDownꢀMode]
ꢀꢀCode:ꢀ11000000 (C0h)
[ꢀPowerꢀDownꢀMode]
ꢀꢀCode:ꢀ11011111 (DFh)
[ꢀPowerꢀDownꢀMode]
ꢀꢀAllꢀpowerꢀdownꢀstatus
Power On
[ꢀPowerꢀDownꢀMode]
ꢀꢀCode:ꢀ11000010 (C2h)
ꢀWaitꢀ0.5 sec
MS6821
MOSA
OPERATION PROCEDURE
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
Theꢀsequenceꢀofꢀoperation:ꢀpowerꢀon→ꢀactivatingꢀ→ꢀpowerꢀdownꢀ→ꢀactivatingꢀ→ꢀpowerꢀoff.ꢀTheꢀbasicꢀflowchartsꢀareꢀ
asꢀfollows:ꢀ
ꢀ
ForꢀHPꢀmodeꢀandꢀHP/BTLꢀmodeꢀ
ꢀ
Power Down
(Shut Down)
Power On
Activating
Power Off
All the Digital Interface Signals
Pull Low
Volume Down To Mute
Input Channels Mute On
Volume Down To Mute
Input Channels Mute On
Setting Input Gain IsFixed
[ꢀEnableꢀInputꢀ&ꢀInputꢀGainꢀ]
ꢀꢀCode:ꢀLch 100xxx00
Rch 101xxx00
ꢀꢀI2Cꢀpullꢀlow
[ꢀAttenuationꢀandꢀMuteꢀ]
ꢀꢀCode:ꢀLch 00111111 (3Fh)
Rch 01111111 (7Fh)
[ꢀAttenuationꢀandꢀMuteꢀ]
ꢀꢀCode:ꢀLch 00111111 (3Fh)
Rch 01111111 (7Fh)
ꢀꢀAudioꢀinputsꢀpullꢀlow
ꢀꢀ(BCK,ꢀWS,ꢀDATA)
ꢀꢀVDD =ꢀGND
Disable Power Down
Power Down Preparation
Power Down Preparation
[ꢀPowerꢀDownꢀModeꢀ]
ꢀꢀCode:ꢀ11000010 (C2h)
[ꢀInput4 &ꢀGainꢀ=ꢀ0dB]
ꢀꢀCode:ꢀLch 10000011(83h)
Rch 10100011(a3h)
ꢀꢀwaitꢀ7 sec
ꢀꢀCode:ꢀ11000010 (C2h)
[ꢀInput4 &ꢀGainꢀ=ꢀ0dB]
ꢀꢀCode:ꢀLch 10000011(83h)
Rch 10100011(a3h)
ꢀꢀwaitꢀ7 sec
ꢀꢀVDD =ꢀSupplyꢀvoltage
Default Status
PDPR = 0
[Attenuationꢀ&ꢀMute]
Muteꢀonꢀ(maxꢀattenuation)
Power Down All The Devices
Pull Down CAP Pin To Ground
Power Down All The Devices
Only CAPPD Keep Activating
ꢀWaitꢀ0.5ꢀsec
[ꢀInputꢀSelectorꢀ&ꢀInputꢀGainꢀ]ꢀ
ꢀꢀLꢁch1,ꢀRꢁch1
0dB
[ꢀPowerꢀDownꢀModeꢀ]
ꢀꢀCode:ꢀ11011110 (DEh)
Mute Off And Volume Up/Down
Step By Step
[ꢀOutputꢀModeꢀ&ꢀMixerꢀ&ꢀFormatꢀ]
ꢀꢀBTLꢀmode
ꢀꢀInputsꢀnotꢀmixedꢀwithꢀDACꢀsignal
RJFꢀformat
[ꢀAttenuationꢀandꢀMuteꢀ]
ꢀꢀCode:ꢀLch 00xxxxxx
Rch 01xxxxxx
All the Digital Interface Signals
Pull Low
Keep All The Digital Interface
Signals Unchanged
ꢀꢀI2Cꢀpullꢀlow
ꢀꢀAudioꢀinputsꢀpullꢀlow
ꢀꢀ(BCK,ꢀWS,ꢀDATA)
Power Off
ꢀꢀDisconnectꢀVDD
ꢀꢀVDDꢀwillꢀbeꢀfellꢀdownꢀtoꢀꢀ0V
ꢀ
ꢀ
REVꢀ 1.0
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MOSA [ MOSA ELECTRONICS ]
