Appendix B Internal I/O Registers
Rev.3.00 Jul. 19, 2007 page 501 of 532
REJ09B0397-0300
SYSCR2—System control register 2
H'F1
System control
Bit
Initial value
Read/Write
7
⎯
1
⎯
6
⎯
1
⎯
5
⎯
1
⎯
3
DTON
0
R/W
0
SA0
0
R/W
2
MSON
0
R/W
1
SA1
0
R/W
4
NESEL
0
R/W
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.
1
When a SLEEP instruction is executed in subactive mode, a transition is
made to watch mode or subsleep mode.
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.
Subactive mode clock select
0
φ
/8
φ
/4
0
1
1
φ
/2
*
W
W
W
Noise elimination sampling frequency select
0
Sampling rate is
φ
/16
1
Sampling rate is
φ
/4
OSC
OSC
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.
Medium speed on flag
0
Operates in active (high-speed) mode
1
Operates in active (medium-speed) mode
Legend: Don't care
*
Содержание F-ZTAT H8 Series
Страница 6: ...Rev 3 00 Jul 19 2007 page iv of xxiv REJ09B0397 0300...
Страница 194: ...7 RAM Rev 3 00 Jul 19 2007 page 168 of 532 REJ09B0397 0300...
Страница 234: ...8 I O Ports Rev 3 00 Jul 19 2007 page 208 of 532 REJ09B0397 0300...
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Страница 352: ...12 A D Converter Rev 3 00 Jul 19 2007 page 326 of 532 REJ09B0397 0300...
Страница 466: ...16 Electrical Characteristics H8 3854 Group Rev 3 00 Jul 19 2007 page 440 of 532 REJ09B0397 0300...
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