SH7615 Datasheet, PDF (585/925 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
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, 03/05, page 547 of 884