Section 27 Power-Down Modes
Rev. 3.00 Jan 25, 2006 page 776 of 872
REJ09B0286-0300
Before using this function to switch the clock, the PLL circuit must be started up to provide a
stable 24-MHz clock.
Bit
Bit Name Initial Value R/W
Description
7
6
5
KWUL1
KWUL0
P6PUE
0
0
0
R/W
R/W
R/W
For details on bits 7 to 5, see section 9.6.4, System
Control Register 2 (SYSCR2).
4, 3
—
All 0
R/(W) Reserved
The initial value should not be changed.
2
CKCHGE 0
R/W
Clock Change Enable
Specifies the next operating mode and system clock
source (
φ
or
φ
24) when the SLEEP instruction is
executed while the SSBY bit is set to 1 in high-speed
mode or medium-speed mode. If the SLEEP instruction
is executed while the SSBY bit is cleared to 0, the
system clock source is not switched and operation shifts
to sleep mode.
0: Enters software standby mode or watch mode, and
switches to the system clock source specified by the
PLCKS bit.
1: Directly switches to the system clock source specified
by the PLCKS bit.
1
—
0
R/(W) Reserved
The initial value should not be changed.
0
PLCKS
0
R/W
PLL Clock Select
Specifies
φ
or
φ
24 as the system clock source in high-
speed mode or medium-speed mode. If the LSON bit in
LPWCR and this bit are both set to 1 simultaneously, the
subclock selection by the LSON bit has higher priority
than clock selection by this bit.
0: Specifies
φ
as the system clock source.
Executing the SLEEP instruction while PLCKS = 0 and
SSBY = 1 can switch the clock source to
φ
.
Executing the SLEEP instruction while LSON = 1 and
SSBY = 1 can switch the clock source to 32-kHz
φ
SUB.
1: Specifies
φ
24 as the system clock source.
Executing the SLEEP instruction while PLCKS = 1 and
SSBY = 1 can switch the clock source to
φ
24.
Содержание H8S/2158
Страница 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Страница 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Страница 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Страница 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Страница 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Страница 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Страница 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...