Renesas H8/38024 Hardware Manual page 371

Table 10.7 Relation between n and Clock
n Clock
φ
0
φ 1
/2 * /φw *
0
w
φ/16
2
φ/64
3
Notes: 1. φw/2 clock in active (medium-speed/high-speed) mode and sleep mode
2. φw clock in subactive mode and subsleep mode
In subactive or subsleep mode, SCI3 can be operated when CPU clock is φw/2 only.
CKS1
0
2
0
1
1
SMR Setting
CKS0
0
1
0
1
Rev. 6.00, 08/04, page 341 of 628