R8C/18 Group, R8C/19 Group
10. Clock Generation Circuit
Rev.1.30
Apr 14, 2006
Page 67 of 233
REJ09B0222-0130
Figure 10.8 shows the State Transitions in Power Control.
Figure 10.8
State Transitions in Power Control
There are six power control modes.
(1) High-speed mode
(2) Medium-speed mode
(3) High-speed on-chip oscillator mode
(4) Low-speed on-chip oscillator mode
(5) Wait mode
(6) Stop mode
CM05: Bit in CM0 register
CM10, CM13, CM14: Bits in CM1 register
OCD2: Bit in OCD register
HRA00, HRA01: Bits in HRA0 register
C
M
1
4
=
0
,
H
R
A
0
1
=
0
,
O
C
D
2
=
1
C
M
1
3
=
1
,
C
M
0
5
=
0
,
O
C
D
2
=
0
C
M
1
3
=
1
, C
M
0
5
=
0
,
O
C
D
2
=
0
High-speed mode,
medium-speed mode
High-speed on-chip
oscillator mode
OCD2 = 0
CM05 = 0
CM13 = 1
OCD2 = 1
HRA01 = 1
HRA00 = 1
Reset
Wait mode
Stop mode
Interrupt
CM10 = 1
(a
ll oscillators stop
)
Interrupt
WAIT
instruction
H
R
A
0
0
=
1
, H
R
A
0
1
=
1
,
O
C
D
2
=
1
H
R
A
00 =
1,
H
R
A
0
1
=
1
C
M
14 =
1,
H
R
A
01
=
0
OCD2 = 1
HRA01 = 0
CM14 = 0
Low-speed on-chip
oscillator mode
