Renesas H8S Family Hardware Manual page 437

Table 10.2 Switching of Internal Clock and FRC Operation
Timing of Switchover
by Means of CKS1
No. and CKS0 Bits
1 Switching from
low to low
2 Switching from
low to high
3 Switching from
high to low
FRC Operation
Clock before
switchover
Clock after
switchover
FRC clock
FRC N
Clock before
switchover
Clock after
switchover
FRC clock
FRC N
Clock before
switchover
Clock after
switchover
FRC clock
FRC N
Section 10 16-Bit Free-Running Timer (FRT)
N + 1
CKS bit rewrite
N + 1
CKS bit rewrite
*
N + 1
CKS bit rewrite
Rev. 1.00 Mar. 12, 2008 Page 389 of 1178
N + 2
N + 2
REJ09B0403-0100