SH7616 Datasheet, PDF (567/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Timing of Rewrite of
No. CKS1 and CKS0 Bits
3 High-to-low switch
FRC Operation
Clock before
switching
Section 12 16-Bit Free-Running Timer (FRT)
Clock after
switching
FRC clock
FRC
N
4 High-to-high switch
Clock before
switching
Clock after
switching
FRC clock
N+1
N+2
Rewrite of CKS bit
FRC
N
N+1
N+2
Rewrite of CKS bit
Note: Because the switchover is considered a falling edge, FRC starts counting up.
12.7.5 Timer Output (FTOA, FTOB)
During a power-on reset, the timer outputs (FTOA, FTOB) will be unreliable until the oscillation
stabilizes. The initial value is output after the oscillation settling time has elapsed.
Rev. 2.00 Mar 09, 2006 page 541 of 906
REJ09B0292-0200