550
SBYCR—Standby Control Register
H'FF3A
System Control
Bit
Initial value
Read/Write
7
SSBY
0
R/W
6
OPE
1
R/W
5
—
0
—
4
—
0
—
3
STS3
1
R/W
2
STS2
1
R/W
1
STS1
1
R/W
0
STS0
1
R/W
Standby Timer Select 3 to 0
0
Reserved
1
0
1
Reserved
Reserved
Reserved
Reserved
Standby time = 64 states
Standby time = 512 states
Standby time = 1,024 states
Standby time = 2,048 states
Standby time = 4,096 states
Standby time = 16,384 states
Standby time = 32,768 states
Standby time = 65,536 states
Standby time = 131,072 states
Standby time = 262,144 states
Standby time = 524,288 states
0
1
0
1
0
0
1
1
0
1
0
0
1
1
0
1
0
1
0
1
0
0
1
1
0
1
Output Port Enable
0
In software standby mode, address bus and bus control signals
are high-impedance
1
In software standby mode, address bus and bus control signals
retain output state
Software Standby
0
Transition to sleep mode after execution of SLEEP instruction
1
Transition to software standby mode after execution of SLEEP instruction
Note: In the F-ZTAT™ version, the flash memory
oscillation settling time must be secured.
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