HD64336901G Renesas Technology, HD64336901G Datasheet - Page 103

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

5.3.2
The timing for changing clocks are shown in figures 5.6 to 5.8.
(Internal signal)
[Legend]
OSCSEL: Bit 4 in CKCSR
PHISTOP: System clock stop control signal
CKSTA:
Note: * The
Figure 5.6 Timing Chart of Switching Internal RC Clock to External Clock
OSC:
RC:
:
Clock Change Timing
PHISTOP
OSCSEL
Internal RC clock operation
CKSTA
OSC
RC
rising edge of the
External clock
Internal RC clock
System clock
Bit 0 in CKCSR
halt duration is the duration from the timing when the
Wait for external
oscillation settling
Nwait
OSC
clock after seven clock cycles of the
halt*
Rev. 1.00, 11/03, page 75 of 376
External clock operation
RC
clock stops to the first
clock have elapsed.