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Chapter 18 Timebase Counter
5.Operation
5.7 Types of Oscillation Stabilization Wait
■ Timebase counter
Automatically provides a count for the oscillation stabilization wait time.
When a trigger occurs to change the device to the oscillation stabilization wait state, the timebase counter is
cleared and then starts counting the specified oscillation stabilization wait time.
■ “L” level input to INIT pin
When device operation is restarted by inputting an “L” level to the INIT pin while the oscillation is halted (the
three cases listed below), the width of the “L” level input provides the stabilization time required by the
oscillation circuit.
• INIT pin input after power turned on.
• INIT pin input when oscillation halted during stop mode
• INIT pin input when subclock selected as clock source and main clock oscillation halted.
■ Timebase timer
Using the timebase timer to generate the main PLL lock time is recommended.
See “Chapter 20 Software Watchdog Timer (Page No.273)” for details.
■ Main oscillation stabilization wait timer
Used when restarting the main clock while operating in subclock mode.
See “Chapter 22 Main Oscillation Stabilisation Timer (Page No.289)” for details.
■ Sub oscillation stabilisation wait timer
Used when restarting the subclock while operating in main clock mode.
See “Chapter 23 Sub Oscillation Stabilisation Timer (Page No.299)” for details.