Datasheet

Appendix B Internal I/O Registers
Rev.6.00 Sep. 27, 2007 Page 1132 of 1268
REJ09B0220-0600
SBYCR—Standby Control Register H'FF38 Power-Down State
7
SSBY
0
R/W
6
STS2
0
R/W
5
STS1
0
R/W
4
STS0
0
R/W
3
OPE
1
R/W
0
IRQ37S
0
R/W
2
—
0
—
1
—
0
—
Software Standby
0
1
Transition to sleep mode after execution of SLEEP instruction
Transition to software standby mode after execution of SLEEP instruction
Standby Timer Select
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Standby time = 8192 states
Standby time = 16384 states
Standby time = 32768 states
Standby time = 65536 states
Standby time = 131072 states
Standby time = 262144 states
Reserved
Standby time = 16 states
Output Port Enable
Bit
Initial value
Read/Write
:
:
:
IRQ37 Software Standby Clear Select
0
1
IRQ
3
to IRQ
7
cannot be used as software
standby mode clearing sources
IRQ
3
to IRQ
7
can be used as software
standby mode clearing sources
0
1
In software standby mode, address bus and
bus control signals are high-impedance
In software standby mode, address bus and
bus control signals retain output state