HD64F2149 Datasheet, PDF (362/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Timing of Switchover
by Means of CKS1
No. and CKS0 Bits
3
Switching from
high to low
FRC Operation
Clock before
switchover
Clock after
switchover
*
FRC clock
4
Switching from
high to high
FRC
N
Clock before
switchover
N+1
N+2
CKS bit rewrite
Clock after
switchover
FRC clock
FRC
N
N+1
N+2
CKS bit rewrite
Note: * Generated on the assumption that the switchover is a falling edge; FRC is incremented.
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