Hitachi H8S/2215 Series Hardware Manual page 669

Bit Bit Name Initial Value
7 SSBY 0
6 STS2 0
5 STS1 0
4 STS0 0
3 OPE 1
2 to 0 — 0
R/W Description
R/W Software Standby:
This bit specifies the transition mode after executing the
SLEEP instruction
0: Shifts to sleep mode when the SLEEP instruction
is executed
1: Shifts to software standby mode when the SLEEP
instruction is executed
This bit does not change when clearing software standby
mode by using external interrupts and shifting to normal
operation. 0 should be written to this bit for clearing.
R/W Standby Timer Select 2 to 0:
R/W These bits select the MCU wait time for clock
stabilization when cancel software standby mode by an
R/W
external interrupt. With a crystal oscillator (table 22.3),
select a wait time of 8ms (oscillation stabilization time) or
more, depending on the operating frequency. With an
external clock, there are no specific wait requirements.
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
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
— Reserved:
These bits are always read as 0, and cannot be
modified.
Rev. 3.0, 10/02, page 611 of 686