Datasheet

Section 13 8-Bit Timers (TMR)
Rev. 3.00 Mar 17, 2006 page 647 of 926
REJ09B0283-0300
Table 13.5 Switching of Internal Clock and TCNT Operation
No.
Timing of Switchover
by Means of CKS1
and CKS0 Bits TCNT Clock Operation
1 Switching from
low to low
*
1
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
CKS bit write
NN + 1
2 Switching from
low to high
*
2
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
CKS bit write
N N + 1 N + 2
3 Switching from
high to low
*
3
Clock before
swichover
Clock after
swichover
TCNT clock
TCNT
CKS bit write
N N + 1 N + 2
*
4