Rev. 6.00, 08/04, page 584 of 628
SYSCR1—System Control Register 1
H'F0
System Control
Bit
Initial value
Read/Write
Notes: 1. Applies to products other than the H8/38124 Group.
2. Applies to the H8/38124 Group.
7
SSBY
0
R/W
6
STS2
0
R/W
5
STS1
0
R/W
3
LSON
0
R/W
0
MA0
1
R/W
2
1
1
MA1
1
R/W
4
STS0
0
R/W
Software Standby
0 • When a SLEEP instruction is executed in active mode, a transition is
made to sleep mode
1
Standby Timer Select 2 to 0
0
Wait time = 8,192 states
*
1
Wait time = 16,384 states
*
1
0 0
1
Wait time = 1,024 states
*
1
Wait time = 2,048 states
*
1
1 0
1
Active (medium-speed)
Mode Clock Select
φ
osc
/16
φ
osc
/32
0
1
0
0
1
1
φ
osc
/64
φ
osc
/128
1
1
0 0
1 0
1
Wait time = 4,096 states
*
1
Wait time = 2 states
*
1
Wait time = 8 states
*
1
Wait time = 16 states
*
1
Wait time = 8,192 states
*
2
Wait time = 16,384 states
*
2
Wait time = 32,768 states
*
2
Wait time = 65,536 states
*
2
Wait time = 131,072 states
*
2
Wait time = 2 states
*
2
Wait time = 8 states
*
2
Wait time = 16 states
*
2
Low Speed on Flag
0
The CPU operates on the system clock (
φ
)
1
The CPU operates on the subclock (
φ
)
SUB
• When a SLEEP instruction is executed in subactive mode, a transition
is made to subsleep mode
• When a SLEEP instruction is executed in active mode, a transition is
made to standby mode or watch mode
• When a SLEEP instruction is executed in subactive mode, a transition
is made to watch mode
Содержание H8/38024 Series
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