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Rev. 2.0, 11/00, page 1008 of 1037
H'FFEB: Low-Power Control Register LPWRCR: System Control
0
0
1
0
R/W
2
0
3
0
4
0
5
0
6
0
7
R/W
R/W
NESEL
R/W
LSON
0
R/W
DTON
SA1
SA0
Low-speed on flag
Noise elimination sampling frequency select
Subactive mode clock select
Subactive mode clock select
Sampling at
φ
divided by 16
Sampling at
φ
divided by 4
0
1
• When a SLEEP instruction is executed in high-speed mode or medium-speed mode,
a transition is made to sleep mode, standby mode, or watch mode
• When a SLEEP instruction is executed in subactive mode, a transition is made to watch
mode, or directly to high-speed mode
• When a SLEEP instruction is executed in high-speed mode or medium-speed mode,
a transition is made directly to subactive mode
*
, or a transition is made to sleep mode
or standby mode
• When a SLEEP instruction is executed in subactive mode, a transition is made
directily to high-speed mode, or a transition is made to subsleep mode
0
1
Direct transfer on flag
• When a SLEEP instruction is executed in high-speed mode or medium-speed mode,
a transition is made to sleep mode, standby mode, or watch mode
• When a SLEEP instruction is executed in subactive mode, a transition is made to watch
mode, or directly to high-speed mode
• After watch mode is cleared, a transition is made to high-speed mode
• When a SLEEP instruction is executed in high-speed mode a transition is made to
watch mode, subactive mode, sleep mode or standby mode.
• When a SLEEP instruction is executed in subactive mode, a transition is made to
subsleep mode or watch mode.
• After watch mode is cleared, a transition is made to subactive mode
0
1
Note:
*
Don't care.
0
0
SA0
SA1
1
0
*
1
Operating clock of CPU is
φ
w/8
Operating clock of CPU is
φ
w/4
Operating clock of CPU is
φ
w/2
Bit :
Initial value :
R/W :
—
—
—
—
—
—
Содержание Hitachi H8S/2191
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