SYSCR2—System control register 2
H'F1
System control
Bit
7
—
1
6
—
1
5
—
1
4
3
2
MSON
0
1
0
NESEL DTON
SA1
0
SA0
0
Initial value
Read/Write
1
0
—
—
—
R/W
R/W
R/W
R/W
R/W
Subactive mode clock select
0
0
1
øW/8
øW/4
øW/2
1
*
Medium speed on flag
*: Don’t care
0
1
Operates in active (high-speed) mode
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
1
Sampling rate is øOSC/16
Sampling rate is øOSC/4
464
ETC [ ETC ]
