Datasheet

Table Of Contents
Section 22 Power-Down Modes
REJ09B0140-0900 Rev. 9.00 Page 685 of 846
Sep 16, 2010
H8S/2215 Group
Bit Bit Name Initial Value R/W Description
6
5
4
STS2
STS1
STS0
0
0
0
R/W
R/W
R/W
Standby Timer Select 2 to 0
These bits select the MCU wait time for clock
stabilization when cancel software standby mode by an
external interrupt. With a crystal oscillator (tables 22.3
and 22.4), select a wait time of t
OSC2
ms (oscillation
stabilization time) or more, depending on the operating
frequency. With an external clock, there are no specific
wait requirements.
However, in the F-ZTAT version a wait time of 16 states
cannot be used with an external clock. In this case it is
necessary to ensure a wait time of 100 µs or more.
000: Standby time = 8192 states
001: Standby time = 16384 states
010: Standby time = 32768 states
011: Standby time = 65536 states
100: Standby time = 131072 states
101: Standby time = 262144 states
110: Standby time = 2048 states
111: Standby time = 16 states
3 OPE 1 R/W Output Port Enable
This bit selects whether address bus and bus control
signals (CS0 to CS7, AS, RD, HWR, and LWR) are
brought to high impedance state or retained in software
standby mode.
0: High impedance state
1: Retained
2 to 0 All 0 Reserved
These bits are always read as 0, and cannot be
modified.