h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 614
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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Section 21 Power-Down Modes
21.1.2
LPWRCR controls power-down modes.
Rev. 2.00 Dec. 05, 2005 Page 576 of 724
REJ09B0200-0200
Bit
7
6
5
4
3
Bit Name
DTON
LSON
NESEL
SUBSTP
RFCUT
Low-Power Control Register (LPWRCR)
Initial
Value
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Direct Transition ON Flag
This bit in combination with the SSBY bit in SBYCR, the
LSON bit in LPWRCR, and the PSS bit in TCSR
specifies the operating mode after executing the SLEEP
instruction. For details, see table 21.2.
Low-Speed ON Flag
This bit in combination with the SSBY bit in SBYCR, the
DTON bit in LPWRCR, and the PSS bit in TCSR
specifies the operating mode after executing the SLEEP
instruction. For details, see table 21.2.
Noise Elimination Sampling Frequency Select
Selects the frequency of the clock (φ) generated by the
system clock oscillator to be used to sample the
subclock (φ
this bit to 0 when φ is 5 MHz or larger.
0: Sampled at φ/32
1: Sampled at φ/4
Subclock Enable
Enables or disables subclock generation
0: Enables subclock generation
1: Disables subclock generation
Oscillation Circuit Feedback Resistance Control
Turns the internal feedback resistance of the main clock
oscillator on or off.
0: When the main clock is oscillating, sets the
1: Sets the feedback resistance off.
feedback resistance on. When the main clock is
stopped, sets the feedback resistance off.
SUB
) generated by the subclock oscillator. Set
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