Renesas M16C/6NK Informações Técnicas Página 99

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Rev.2.10 Apr 14, 2006 page 75 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 8. Clock Generation Circuit
Figure 8.12 State Transition to Stop Mode and Wait Mode
Stop mode
Reset
Normal mode
PLL operating mode
High-speed mode,
Medium-Speed Mode
Medium-speed mode
(divided-by-8 mode)
Low-speed mode,
low power dissipation mode
Stop mode
Wait mode
Wait mode
Stop mode
WAIT
instruction
WAIT
instruction
WAIT
instruction
WAIT
instruction
CPU operation stoppedAll oscillators stopped
CM05, CM06, CM07: Bits in CM0 register
CM10, CM11: Bits in CM1 register
NOTES:
1.
Do not go directly from PLL operating mode to wait or stop mode.
2.PLL operating mode can be entered from high-speed mode. Similarly, PLL operating mode can be changed back to high-speed mode.
3.Write to registers CM0 and CM1 per 16 bits with the CM21bit in the CM2 register = 0 (on-chip oscillator stops).
Since the operation starts from the main clock after exiting stop mode, the time until the CPU operates can be reduced.
4.The on-chip oscillator clock divided by 8 provides the CPU clock.
5.Before entering stop mode, be sure to set the CM20 bit in the CM2 register to 0 (oscillation stop, re-oscillation detection function disabled).
Interrupt
CM10 = 1
(5)
CM07 = 0
CM06 = 1
CM05 = 0
CM11 = 0
CM10 = 1
(3)
CM10 = 1
(5)
Interrupt
CM10 = 1
(5)
Interrupt
Interrupt
Interrupt
(NOTES 1, 2)
Wait mode
Interrupt
When
low
power
dissipation
mode
When
low-
speed
mode
On-chip oscillator mode,
on-chip oscillator dissipation mode
Stop mode
CM10 = 1
(5)
Interrupt
(4)
Wait mode
Interrupt
Figure 8.12 shows the State Transition to Stop Mode and Wait Mode. Figure 8.13 shows the State Transition
in Normal Operating Mode.
Table 8.8 shows a state transition matrix describing allowed transition and setting. The vertical line shows
current state and horizontal line show state after transition.
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