[AK4679]
■ DSP State Transition (operational state ↔ wait sync)
Standby Sequence by SYNC1 and SYNC3
When SYNC input is stopped, fixed to “L” or “H” for more than 0.8ms during RUN state, CGU block is powered-down
and the DSP block enters the wait sync mode.
>0.8ms
SYNC1 or SYNC3
CGU CTRL
“H” or “L”
Device Operational CGU unlocked
Wait Sync
Device state
Figure 120. Standby Sequence Example by SYNC1/3
Resume Sequence by SYNC1 and SYNC3
In wait sync mode, CGU block will be powered up in 5ms after SYNC1/3 input. The DSP block resumes operation when
DSP reset is released internally and the RAM data is cleared.
< 5ms
SYNC1 or SYNC3
CLKGEN & Ctrl
“H” or “L”
CGU locked
Wait Sync
Device state
Device Operational
Figure 121. Resume Sequence by SYNC1/3
Refer to Figure 118 for the sequence when resuming the operation from hardware default state.
MS1402-E-06
2013/02
- 144 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
