M16C30P_07 Datasheet, PDF (73/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
9. Clock Generating Circuit
Figure 9.7 shows the state transition from normal operation mode to stop mode and wait mode. Figure 9.8
shows the State Transition in Normal Operation Mode.
Table 9.7 shows a state transition matrix describing Allowed Transition and Setting. The vertical line shows
current state and horizontal line shows state after transition.
Reset
All oscillators stopped
Stop mode
CM10=1
Interrupt
CM07=0
CM06=1
CM05=0
CM10=1⁽¹⁾
Interrupt
Stop mode
CM10=1
Stop mode
CM10=1
Interrupt
Medium-speed mode
(divided-by-8 mode)
High-speed, medium-
speed mode
When
low power
dissipation
mode
When
low-speed
mode
Low-speed, low power
dissipation mode
Normal mode
WAIT
instruction
Interrupt
WAIT
instruction
Interrupt
WAIT
instruction
Interrupt
CM05, CM06, CM07 : Bits in CM0 register
CM10
: Bit in CM1 register
NOTES :
1. Write to the CM0 and CM1 registers simultaneously per 16 bit.
Since the operation starts from the main clock after exiting stop
mode, the time until the CPU operates can be reduced.
Figure 9.7 State Transition to Stop Mode and Wait Mode
CPU operation stopped
Wait mode
Wait mode
Wait mode
Rev.1.22 Mar 29, 2007 Page 57 of 291
REJ09B0179-0122