HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 599

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

18.2
18.2.1
SBYCR is an 8-bit readable/writable register that performs software standby mode control.
SBYCR is initialized to H'08 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bit 7—Software Standby (SSBY): Specifies a transition to software standby mode. Remains set
to 1 when software standby mode is released by an external interrupt, and a transition is made to
normal operation. The SSBY bit should be cleared by writing 0 to it.
Bits 6 to 4—Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the time the MCU
waits for the clock to stabilize when software standby mode is cleared by an external interrupt.
With crystal oscillation, refer to table 18.4 and make a selection according to the operating
frequency so that the standby time is at least 8 ms (the oscillation stabilization time). With an
external clock, any selection can be made.
Bit 7
SSBY
0
1
Bit
Initial value
R/W
Register Descriptions
Standby Control Register (SBYCR)
Description
Transition to sleep mode after execution of SLEEP instruction
Transition to software standby mode after execution of SLEEP instruction
:
:
:
SSBY
R/W
7
0
STS2
R/W
6
0
STS1
R/W
5
0
STS0
R/W
4
0
Rev.3.00 Mar. 26, 2007 Page 557 of 772
OPE
R/W
3
1
Section 18 Power-Down Modes
—
—
2
0
REJ09B0355-0300
—
—
1
0
(Initial value)
—
—
0
0