D12320VF25V Datasheet, PDF (838/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 Power-Down Modes
Bit 6 Bit 5 Bit 4
STS2 STS1 STS0 Description
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: * Not available in the F-ZTAT versions.
(Initial value)
Bit 3—Output Port Enable (OPE): Specifies whether the output of the address bus and bus
control signals (CS0 to CS7, AS, RD, HWR, LWR, CAS) is retained or set to the high-impedance
state in software standby mode.
Bit 3
OPE
0
1
Description
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
(Initial value)
Bits 2 and 1—Reserved: These bits cannot be modified and are always read as 0.
Bit 0—IRQ37 Software Standby Clear Select (IRQ37S): Specifies whether inputs IRQ3 to
IRQ7 can be used as software standby mode clearing sources in addition to the usual sources, NMI
and IRQ0 to IRQ2 inputs.
Bit 0
IRQ37S
0
1
Description
Inputs IRQ3 to IRQ7 cannot be used as software standby mode clearing sources
(Initial value)
Inputs IRQ3 to IRQ7 can be used as software standby mode clearing sources
Rev.7.00 Feb. 14, 2007 page 804 of 1108
REJ09B0089-0700