M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 77

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

M
R
R
e
E
1
NOTES:
. v
Table 7.3 Setting Clock Related Bit and Modes
J
6
Low-speed mode
Low power dissipation mode
On-chip oscillator low power
dissipation mode
On-chip
oscillator
mode
(3)
PLL operation mode
0
Modes
High-speed mode
Medium-
speed
mode
7.6.2 Wait Mode
C
2
9
1. When the CM05 bit is set to "1" (main clock turned off) in low-speed mode, the mode goes to low power
2. The divide-by-n value can be selected the same way as in on-chip oscillator mode.
3. On-chip oscillator frequency can be any of those described in the section 7.6.1.6 On-chip Oscillator Mode.
In wait mode, the CPU clock stops running. The CPU and the watchdog timer, operated by the CPU
clock, also stop. However, if the PM22 bit in the PM2 register is “1” (on-chip oscillator clock for the
watchdog timer count source), the watchdog timer remains active. Because the main clock, sub clock and
on-chip oscillator clock all are on, the peripheral functions using these clocks keep operating.
0 .
2 /
B
7.6.2.1 Peripheral Function Clock Stop Function
7.6.2.2 Entering Wait Mode
7.6.1.6 On-chip Oscillator Mode
7.6.1.7 On-chip Oscillator Low Power Dissipation Mode
dissipation mode and CM06 bit is set to "1" (divided by 8 mode) simultaneously
0
0
8
0
If the CM02 bit is “1” (peripheral function clocks turned off during wait mode), the f
f
much. However, f
The microcomputer is placed into wait mode by executing the WAIT instruction.
When the CM11 bit is set to “1” (CPU clock source is the PLL clock), be sure to clear the CM11 bit to
“0” (CPU clock source is the main clock) before going to wait mode. The power consumption of the
chip can be reduced by clearing the PLC07 bit to “0” (PLL stops).
The selected on-chip oscillator clock divided by 1 (undivided), 2, 4, 8 or 16 provides the CPU clock.
The on-chip oscillator clock is also the clock source for the peripheral function clocks. If the sub clock
is on, f
selected by the ROCR3 to ROCR0 bits in the ROCR registers. When the operation mode is returned
to the high and medium speed modes, set the CM06 bit to “1” (divided by 8 mode).
The main clock is turned off after being placed in on-chip oscillator mode. The CPU clock can be se-
lected as in the on-chip oscillator mode. The on-chip oscillator clock is the clock source for the peripheral
function clocks. If the sub clock is on, f
2SIO
4
G
J
7
a
o r
0 -
. n
u
, f
2
3
p
0
divided by 16
divided by 16
divided by 2
divided by 4
divided by 8
divided by 1
divided by 2
divided by 4
divided by 8
, 1
C32
8SIO
0
(
M
2
0
1
can be used as the count source for timers A and B. The on-chip oscillator frequency can be
, f
0
6
7
32SIO
C
2 /
, 8
page 57
C32
and f
M
1
CM2 register
remains on.
6
AD
C
CM21
f o
2 /
clocks stop running in wait mode, with the power consumption reduced that
0
0
0
0
0
0
1
1
1
1
1
1
8
3
) B
8
5
CM11
C32
1
0
0
0
0
0
can be used as the count source for Timers A and B.
CM1 register
CM17, CM16
00
00
01
10
11
11
00
01
10
(2)
2
2
2
2
2
2
2
2
2
CM07
0
0
0
0
0
0
1
1
0
0
0
0
0
0
.
CM06
CM0 register
(2)
7. Clock Generation Circuit
1
0
0
0
0
1
0
0
0
0
1
0
(1)
CM05
1
, f
1
0
0
0
0
0
0
0
0
0
0
0
0
1
2
(1)
, f
8
, f
CM04
32
, f
1
1
1SIO
,