M16C30P_07 Datasheet, PDF (74/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
9. Clock Generating Circuit
Main clock oscillation
High-speed mode
CPU clock: f(XIN)
CM07=0
CM06=0
CM17=0
CM16=0
Middle-speed mode
(divide by 2)
CPU clock: f(XIN)/2
CM07=0
CM06=0
CM17=0
CM16=1
Middle-speed mode
(divide by 4)
CPU clock: f(XIN)/4
CM07=0
CM06=0
CM17=1
CM16=0
Middle-speed mode
(divide by 8)
CPU clock: f(XIN)/8
CM07=0
CM06=1
Middle-speed mode
(divide by 16)
CPU clock: f(XIN)/16
CM07=0
CM06=0
CM17=1
CM16=1
CM04=1
CM04=0
High-speed mode
CPU clock: f(XIN)
CM07=0
CM06=0
CM17=0
CM16=0
Middle-speed mode
(divide by 2)
CPU clock: f(XIN)/2
CM07=0
CM06=0
CM17=0
CM16=1
Middle-speed mode
(divide by 4)
CPU clock: f(XIN)/4
CM07=0
CM06=0
CM17=1
CM16=0
Middle-speed mode
(divide by 8)
CPU clock: f(XIN)/8
CM07=0
CM06=1
Middle-speed mode
(divide by 16)
CPU clock: f(XIN)/16
CM07=0
CM06=0
CM17=1
CM16=1
CM07=1⁽²⁾
Low-speed mode
CPU clock: f(XCIN)
CM07=1
CM07=0^{(1, 3)}
CM05=1
Low power dissipation mode
CPU clock: (XCIN)
CM07=1
CM06=1
CM15=1
CM05=0
Sub clock oscillation
NOTES:
1. Wait the main clock oscillation stabilizes.
2. Switch clock after oscillation of sub-clock is sufficiently stable.
3. Change CM17 and CM16 bits in the CM1 register before changing CM06 bit in the CM0 register.
4. Transit in accordance with arrow.
Figure 9.8 State Transition in Normal Operation Mode
Rev.1.22 Mar 29, 2007 Page 58 of 291
REJ09B0179-0122