HD64F2149 Datasheet, PDF (923/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

LPWRCR—Low-Power Control Register
H'FF85
System
Bit
Initial value
Read/Write
(8S/2169)
Read/Write
(8S/2149)
7
DTON
0
R/W
R/W
6
5
4
3
2
1
0
LSON NESEL EXCLE —
—
—
—
0
0
0
0
0
0
0
R/W R/W R/W R/W
—
—
—
R/W R/W R/W
—
—
—
—
Subclock input enable
0 Subclock input from EXCL pin is disabled
1 Subclock input from EXCL pin is enabled
Noise elimination sampling frequency select
0 Sampling at ø divided by 32
1 Sampling at ø divided by 4
Low-speed on flag
0 • When a SLEEP instruction is executed in high-speed mode or
medium-speed mode, a transition is made to sleep mode, software
standby mode, or watch mode*
• When a SLEEP instruction is executed in subactive mode, a transition
is made to watch mode, or directly to high-speed mode
• After watch mode is cleared, a transition is made to high-speed mode
1 • When a SLEEP instruction is executed in high-speed mode a
transition is made to watch mode or subactive mode*
• When a SLEEP instruction is executed in subactive mode, a transition
is made to subsleep mode or watch mode
• After watch mode is cleared, a transition is made to subactive mode
Note: * When a transition is made to watch mode or subactive mode,
high-speed mode must be set.
Direct-transfer on flag
0 • When a SLEEP instruction is executed in high-speed mode or medium-speed mode,
a transition is made to sleep mode, software standby mode, or watch mode*
• When a SLEEP instruction is executed in subactive mode, a transition is made to
subsleep mode or watch mode
1 • When a SLEEP instruction is executed in high-speed mode or medium-speed mode,
a transition is made directly to subactive mode*, or a transition is made to sleep mode
or software 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
Note: * When a transition is made to watch mode or subactive mode, high-speed mode
must be set.
889