hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 170
hd64338342hw
Manufacturer Part Number
hd64338342hw
Description
Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD64338342HW.pdf
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Section 5 Power-Down Modes
5.1.1
The operation mode is selected using the system control registers described in table 5.3.
Table 5.3
Name
System control register 1
System control register 2
1. System Control Register 1 (SYSCR1)
SYSCR1 is an 8-bit read/write register for control of the power-down modes.
Upon reset, SYSCR1 is initialized to H'07.
Bit 7: Software standby (SSBY)
This bit designates transition to standby mode or watch mode.
Bit 7
SSBY
0
1
Rev. 6.00 Aug 04, 2006 page 134 of 680
REJ09B0145-0600
Bit
Initial value
Read/Write
System Control Registers
System Control Registers
Description
SSBY
When a SLEEP instruction is executed in active mode,
a transition is made to sleep mode
When a SLEEP instruction is executed in subactive mode, a transition is made
to subsleep mode
When a SLEEP instruction is executed in active mode, a transition is made to
standby mode or watch mode
When a SLEEP instruction is executed in subactive mode, a transition is made
to watch mode
R/W
7
0
STS2
R/W
6
0
Abbreviation
SYSCR1
SYSCR2
STS1
R/W
5
0
STS0
R/W
4
0
R/W
R/W
R/W
LSON
R/W
3
0
Initial Value
H'07
H'F0
2
1
MA1
R/W
1
1
Address
H'FFF0
H'FFF1
(initial value)
MA0
R/W
0
1
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