Rev. 1.0, 02/00, page 74 of 1141
4.2.2
Low-Power Control Register (LPWRCR)
0
0
1
0
R/W
R/W
2
0
3
0
4
—
—
—
—
—
—
0
5
0
6
0
7
R/W
NESEL
R/W
LSON
0
R/W
DTON
SA1
SA0
Bit :
Initial value :
R/W :
LPWRCR is an 8-bit readable/writable register that performs power-down mode control.
LPWRCR is initialized to H'00 by a reset.
Bit 7
Direct-Transfer on Flag (DTON): Specifies whether a direct transition is made between
high-speed mode, medium-speed mode, and subactive mode when making a power-down
transition by executing a SLEEP instruction. The operating mode to which the transition is made
after SLEEP instruction execution is determined by a combination of other control bits.
Bit 7
DTON
Description
0
•
When a SLEEP instruction is executed in high-speed mode or medium-speed
mode, a transition is made to sleep mode, standby mode, or watch mode
•
When a SLEEP instruction is executed in subactive mode, a transition is made
to subsleep mode or watch mode
(Initial value)
1
•
When a SLEEP instruction is executed in high-speed mode or medium-speed
mode, transition is made directly to subactive mode, or a transition is made to
sleep mode or standby mode
•
When a SLEEP instruction is executed in subactive mode, a transition is made
directly to high-speed mode, or a transition is made to subsleep mode