HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 464

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

SYSCR1—System control register 1
460
Bit
Initial value
Read/Write
Note: Don’t care
*
SSBY
R/W
Software standby
7
0
0 • When a SLEEP instruction is executed in active mode, a transition is
1
• When a SLEEP instruction is executed in subactive mode, a transition
• When a SLEEP instruction is executed in active mode, a transition is
• When a SLEEP instruction is executed in subactive mode, a transition
made to sleep mode
is made to subsleep mode
made to standby mode or watch mode
is made to watch mode
STS2
R/W
6
0
STS1
R/W
Standby timer select 2 to 0
0
1 *
5
0
0 0
1 0
1
1
*
Low speed on flag
STS0
R/W
0 The CPU operates on the system clock (ø)
1 The CPU operates on the subclock (ø
Wait time = 8,192 states
Wait time = 16,384 states
Wait time = 32,768 states
Wait time = 65,536 states
Wait time = 131,072 states
4
0
LSON
R/W
3
0
H'FFF0
Active (medium-speed)
mode clock select
—
—
2
1
0
1
0
1
0
1
ø
ø
ø
ø
MA1
osc
osc
osc
osc
R/W
1
1
/128
/16
/32
/64
System control
MA0
R/W
SUB
0
1
)