D12320VF25IV Datasheet, PDF (1164/1304 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
Software Standby
0 Transition to sleep mode after execution of SLEEP instruction
1 Transition to software standby mode after execution of SLEEP instruction
Rev.6.00 Sep. 27, 2007 Page 1132 of 1268
REJ09B0220-0600