Interrupts And Module Stop Mode - Renesas H8S Series Hardware Manual

Timing of Switchover
by Means of CKS1
No. and CKS0 Bits
4 Switching from high
to high
Notes: 1. Includes switching from low to stop, and from stop to low.
2. Includes switching from stop to high.
3. Includes switching from high to stop.
4. Generated on the assumption that the switchover is a falling edge; TCNT is incremented.
12.6.6

Interrupts and Module Stop Mode

If module stop mode is entered when an interrupt has been requested, it will not be possible to clear the CPU interrupt
source or the DMAC or DTC activation source. Interrupts should therefore be disabled before entering module stop mode.
Rev.6.00 Oct.28.2004 page 452 of 1016
REJ09B0138-0600H
TCNT Clock Operation
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT N N+1 N+2
CKS bit write