Fujitsu MB90460 Series Hardware Manual page 581

CHAPTER 20 8/10-BIT A/D CONVERTER
Figure 20.6-5 Operation Flowchart of the Data Protection Function when EI
<Note> The steps while the A/D converter is halted are omitted.
Notes:
• The conversion data protection function operates only in the interrupt enabled state (ADCS1: INTE = 1).
• If interrupts are disabled during a pause in A/D conversion while EI
may start again. This will cause new data to be written before the old data is transferred.
Reactivation attempted during a pause will cause the old data to be destroyed.
• Reactivation attempted during a pause will destroy the standby data.
562
2
Set EI OS
Start continuous A/D
conversion
End first conversion
Store data in the data
register
End second conversion
NO
Has EI 2 OS
ended?
YES
Store data in the data
register
Third conversion
Continue
Terminate all conversions
Continue
Store data in the data
register
2
Activate EI OS
Halt A/D
2
Activate EI OS
2
Activate EI OS
Interrupt processing routine
Initialize or stop A/D
End
2
OS is operating, A/D conversion
2
OS is used