Cmsemicon CMS32L051 - Start of Count Operation and Re-Enter to Sleep Mode after Returned from Sleep Mode

V1.2.2
CMS32L051 User Manual |Chapter 8 15-Bit Interval Timer
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8.4.2 Start of count operation and re-enter to sleep mode after returned from sleep mode
After returning from sleep mode, if you want to transfer the RINTE set to 1 and transfer it to sleep mode
again, you must confirm that the RENTE bit is reflected after the RINTE set to 1, or at least pass after the
return After 1 count clock of time, it is transferred to sleep mode.
setting the RINTE to 1, confirm that the RINTE bit changes to 1 by polling and then transfer to
sleep mode (see the example in the figure below 1).
 After setting RINTE to 1, wait for at least one cycle of the count clock and then enter sleep mode (see
Figure, Example 2).
return from sleep mode
RINTE=1
RINTE=1？
YES
NO
execute WFI instruction
configure start counting
confirm counter start
operating
transfer to Sleep
mode
return from sleep mode
RINTE=1
execute WFI instruction
transfer to Sleep
mode
wait at least 1 count
clock
at least 1 count
clock cycle is
required after
return
Example 1 Example 2