HD64F3048F16 Datasheet, PDF (223/903 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CKS2 to CKS0
No. Write Timing
RTCNT Operation
3 High → low switchover^*3
Old clock
source
New clock
source
RTCNT
clock
Section 7 Refresh Controller
*⁴
RTCNT
N
4 High → high switchover^*4
Old clock
source
New clock
source
RTCNT
clock
N+1
N+2
CKS bits rewritten
RTCNT
N
N+1
N+2
CKS bits rewritten
Notes: 1. Including switchovers from a low clock source to the halted state, and from the halted
state to a low clock source.
2. Including switchover from the halted state to a high clock source.
3. Including switchover from a high clock source to the halted state.
4. The switchover is regarded as a falling edge, causing RTCNT to increment.
Rev. 3.00 Sep 27, 2006 page 195 of 872
REJ09B0325-0300