TAS5822M has 5 states with different power dissipation which listed in the Electrical Characteristics Table.
- Shutdown Mode. With PDN pin pull down to GND. All internal
LDOs (1.5V for digital core, 5V for analog) are disabled, all registers will be cleared to
default value.
Note: Exit from Shutdown Mode and re-enter into Play mode, need follow up the start-up sequence and reload all register configurations (which generated by TAS5822M tuning software) again.
- Deep Sleep Mode. Deep Sleep Mode. Register 0x03h -D[1:0]=00, device stays in
Deep Sleep Mode. In this mode, I2C block and 1.5V LDO for digital core still
working, but internal 5V LDO (For AVDD and MOSFET gate driver) is disabled for low power
dissipation. This mode can be used to extend the battery life in some portable speaker
applications. If the host processor stops playing audio for a long time, can be set to
Deep Sleep Mode to minimize power dissipation until host processor starts playing audio
again. Unlike the Shutdown Mode (Pulling PDN Low), entering or
exiting Deep Sleep Mode, the DSP keeps active.
- Sleep Mode. Register 0x03h -D[1:0]=01, device stays in Sleep Mode. In this
mode, I2C block, Digital core, DSP Memory , 5V Analog LDO are stilling working.
Unlike the Shutdown Mode (Pull PDN Low), enter or exit Sleep Mode,
DSP is kept active. Exit from this mode and re-enter into play mode, only need to set
Register 0x03h -D[1:0]=11.
- Output Hiz Mode. Register 0x03h -D[1:0]=10, device stays in Hiz Mode. In this mode, only output driver is set to be Hi-Z state, all other block operate normally. Exit from this mode and re-enter into play mode, only need to set Register 0x03h -D[1:0]=11.
- Play Mode. Register 0x03h -D[1:0]=11, device stays in Play Mode.