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H8S2245 bảng dữ liệu(PDF) 599 Page - Renesas Technology Corp

tên linh kiện H8S2245
Giải thích chi tiết về linh kiện  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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Section 18 Power-Down Modes
Rev.3.00 Mar. 26, 2007 Page 557 of 772
REJ09B0355-0300
18.2
Register Descriptions
18.2.1
Standby Control Register (SBYCR)
7
SSBY
0
R/W
6
STS2
0
R/W
5
STS1
0
R/W
4
STS0
0
R/W
3
OPE
1
R/W
0
—
0
—
2
—
0
—
1
—
0
—
Bit
Initial value
R/W
:
:
:
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.
Bit 7
SSBY
Description
0
Transition to sleep mode after execution of SLEEP instruction
(Initial value)
1
Transition to software standby mode after execution of SLEEP instruction
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.



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