Normal Mode - Panasonic MN101L Series User Manual

4.2.1

NORMAL Mode

Transition from SLOW to NORMAL
When the transition from SLOW to NORMAL, the oscillation stabilization wait for HCLK is ensured by hard-
ware. Figure:4.2.2 shows the transition procedure to NORMAL. The transition to NORMAL through IDLE can
be allowed, when HCLK must be stable in IDLE as shown in Figure:4.2.3.
Until entering NORMAL mode since the CPUM is set to transmit to NORMAL mode,
SYSCLK is generated from SCLK.
.. ..
Figure:4.2.3 Transition Flow from SLOW to NORMAL through IDLE
Transition to NORMAL mode
(Set the CPUM as described in Table 4.1.3.)
Automatic high-speed oscillation
stabilization wait time by hardware
Figure:4.2.2 Transition Flow from SLOW to NORMAL
SLOW mode
Transition to IDLE mode
(Set the CPUM as described in Table 4.1.3.)
HCLKCNT.HCLKSEL == 0
YES(Transition to RC mode)
Start the internal high-speed oscillation
HCLKCNT.HRCCNT = 1
Internal high-speed oscillation
stabillization wait time
Transition ot NORMAL mode
(Set the CPUM as described in Table 4.1.3.)
NORMAL mode
SLOW mode
NORMAL mode
NO(Transition to OSC mode)
Start the external high-speed oscillation
HCLKCNT.HOSCCNT = 1
External high-speed oscillation
stabillization wait time
Chapter 4
Clock/ Mode/ Voltage Control
Mode Control Function IV - 15