D12320VF25V Datasheet, PDF (1030/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Appendix B Internal I/O Registers
SBYCR—Standby Control Register
H'FF38
Bit
:
7
6
5
4
3
2
SSBY STS2 STS1 STS0 OPE
⎯
Initial value :
0
0
0
0
1
0
Read/Write : R/W
R/W
R/W
R/W
R/W
⎯
Power-Down State
1
0
⎯ IRQ37S
0
0
⎯
R/W
IRQ37 Software Standby Clear Select
0 IRQ3 to IRQ7 cannot be used as software
standby mode clearing sources
1 IRQ3 to IRQ7 can be used as software
standby mode clearing sources
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
Standby Timer Select
0 0 0 Standby time = 8192 states
1 Standby time = 16384 states
1 0 Standby time = 32768 states
1 Standby time = 65536 states
1 0 0 Standby time = 131072 states
1 Standby time = 262144 states
1 0 Reserved
1 Standby time = 16 states*
Note: * Cannot be used in the F-ZTAT versions.
Software Standby
0 Transition to sleep mode after execution of SLEEP instruction
1 Transition to software standby mode after execution of SLEEP instruction
Rev.7.00 Feb. 14, 2007 page 996 of 1108
REJ09B0089-0700