R5F61655N50FPV Datasheet, PDF (786/1376 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

Section 16 8-Bit Timers (TMR)
Table 16.9 Switching of Internal Clock and TCNT Operation
Timing to Change CKS1
No.
and CKS0 Bits
TCNT Clock Operation
1
Switching from low to low*¹
Clock before
switchover
Clock after
switchover
TCNT input
clock
TCNT
N
N+1
CKS bits changed
2
Switching from low to high*^{2 Clock before}
switchover
Clock after
switchover
TCNT input
clock
TCNT
N
N+1
N+2
CKS bits changed
3
Switching from high to low*^{3 Clock before}
switchover
Clock after
switchover
*⁴
TCNT input
clock
TCNT
N
N+1
N+2
CKS bits changed
4
Switching from high to high Clock before
switchover
Clock after
switchover
TCNT input
clock
TCNT
N
N+1
N+2
CKS bits changed
Notes: 1. Includes switching from low to stop, and from stop to low.
2. Includes switching from stop to high.
3. Includes switching from high to stop.
4. Generated because the change of the signal levels is considered as a falling edge;
TCNT is incremented.
Rev. 2.00 Oct. 20, 2009 Page 754 of 1340
REJ09B0499-0200