HD64F2145 Datasheet, PDF (335/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Table 12.6 Switching of Internal Clocks and TCNT Operation
Timing of Switchover
by Means of CKS1
No. and CKS0 Bits
TCNT Clock Operation
1
Clock switching from low to
low level*¹
Clock before
switchover
Clock after
switchover
TCNT
clock
TCNT
N
N+1
2
Clock switching from low to
high level∗²
Clock before
switchover
CKS bit rewrite
Clock after
switchover
TCNT
clock
TCNT
N
N+1
N+2
CKS bit rewrite
Rev. 2.0, 08/02, page 295 of 788