HD64336900G Datasheet, PDF (114/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

6.1.2 System Control Register 2 (SYSCR2)
SYSCR2 controls the power-down modes, as well as SYSCR1.
Initial
Bit
Bit Name Value R/W Description
7
SMSEL 0
R/W Sleep Mode Selection
This bit specifies the mode to be entered after executing
the SLEEP instruction, as well as the SSBY bit in
SYSCR1. For details, see table 6.2.
6

0

Reserved
This bit is always read as 0.
5
DTON
0
R/W Direct Transfer on Flag
This bit specifies the mode to be entered after executing
the SLEEP instruction, as well as the SSBY bit in
SYSCR1. For details, see table 6.2.
4
MA2
0
R/W Active Mode Clock Select 2 to 0
3
MA1
0
2
MA0
0
R/W These bits select the operating clock frequency in active
R/W
and sleep modes. The operating clock frequency
changes to the set frequency after the SLEEP instruction
is executed.
0XX: φ
100: φ /8
101: φ/16
110: φ/32
111: φ/64
1, 0 
All 0

Reserved
These bits are always read as 0.
[Legend]
X: Don't care
Rev. 1.00, 11/03, page 86 of 376