Renesas H8 Series Hardware Manual page 647

SYSCR2—System Control Register 2
Bit 7

Initial value 1

Read/Write
Medium Speed on Flag
0 Operates in active (high-speed) mode
1 Operates in active (medium-speed) mode
Direct Transfer on Flag
0 • When a SLEEP instruction is executed in active mode, a transition is
made to standby mode, watch mode, or sleep mode
• When a SLEEP instruction is executed in subactive mode, a transition is
made to watch mode or subsleep mode
1 • When a SLEEP instruction is executed in active (high-speed) mode, a direct
transition is made to active (medium-speed) mode if SSBY = 0, MSON = 1, and
LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1
• When a SLEEP instruction is executed in active (medium-speed) mode, a direct
transition is made to active (high-speed) mode if SSBY = 0, MSON = 0, and
LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1
• When a SLEEP instruction is executed in subactive mode, a direct
transition is made to active (high-speed) mode if SSBY = 1, TMA3 = 1, LSON = 0,
and MSON = 0, or to active (medium-speed) mode if SSBY = 1, TMA3 = 1,
LSON = 0, and MSON = 1
Noise Elimination Sampling Frequency Select
0 Sampling rate is φ
1 Sampling rate is φ
6 5
 
1 1
 
/16
OSC
/4
OSC
Appendix B Internal I/O Registers
H'F1
4 3
NESEL DTON MSON
1 0
R/W R/W R/W
Subactive Mode Clock Select
φ
0 0 /8
W
φ
1 /4
W
φ
*
1 /2
W
Rev. 7.00 Mar 10, 2005 page 605 of 652
System Control
2 1 0
SA1 SA0
0 0 0
R/W R/W
*: Don't care
REJ09B0042-0700