HD64F2168 Datasheet, PDF (343/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Table 11.3 Switching of Internal Clock and FRC Operation
Timing of Switchover
by Means of CKS1
No. and CKS0 Bits
1
Switching from
low to low
FRC Operation
Clock before
switchover
Clock after
switchover
FRC clock
2
Switching from
low to high
FRC
Clock before
switchover
Clock after
switchover
FRC clock
N
CKS bit rewrite
N+1
3
Switching from
high to low
FRC
N
Clock before
switchover
Clock after
switchover
FRC clock
N+1
N+2
CKS bit rewrite
*
FRC
N
N+1
N+2
CKS bit rewrite
Rev. 3.00, 03/04, page 303 of 830