h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 504

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

16.1
The registers relating to the power-down mode are shown below.
• Standby control register (SBYCR)
• Module stop control registers H and L (MSTPCRH, MSTPCRL)
16.1.1
SBYCR performs software standby mode control.
Rev. 2.00, 03/04, page 472 of 534
Bit
7
6
5
4
3 to 0
Bit Name
SSBY
STS2
STS1
STS0

Register Descriptions
Standby Control Register (SBYCR)
Initial
Value
0
0
0
0
All 0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Software Standby
This bit specifies the transition mode after executing the
SLEEP instruction
0: Shifts to sleep mode after the SLEEP instruction is
1: Shifts to software standby mode after the SLEEP
This bit does not change when clearing the software
standby mode by using external interrupts and shifting
to normal operation. This bit should be written to 0
when clearing.
Standby Timer Select 2 to 0
These bits select the time the MCU waits for the clock
to stabilize when software standby mode is cleared.
Make a selection according to the operating frequency
so that the standby time is at least oscillation
stabilization time. Table 16.2 shows the relationship
between setting values and number of wait states.
With an external clock, any selection is possible.
Normally the minimum value is recommended.
Reserved
The initial value should not be changed.
executed
instruction is executed