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User’s Manual U11969EJ3V0UM00
CHAPTER 6 CLOCK GENERATOR FUNCTION
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Securing time by signal level width (RESET pin input)
The STOP mode is released when the falling edge is input to the RESET pin.
The time required for the clock output from the oscillator circuit to become stabilized is specified by the low-
level width of the signal input to the RESET pin.
After the rising edge has been input to the RESET pin, operation of the internal system clock begins, and
execution branches to the vector address that is used when the system is reset.
Time base counter (TBC)
The time base counter (TBC) is used to secure the oscillation stabilization time of the oscillator circuit
when the software STOP mode is released.
• In oscillator connecting mode (CESEL = 0)
TBC counts the oscillation stabilization time after the STOP mode is released, and the execution
of a program is started after the counting is completed.
In both the PLL mode (CKSEL = 0) and oscillator connecting mode (CESEL = 0), the count clock of TBC
is selected by the TBCS bit of the PSC register and the following count time can be set.
Oscillation waveform
STOP mode set
Oscillator circuit stops
System clock
STOP status
Internal system
reset signal
Oscillator stabilization time
secured by RESET
RESET signal
Содержание V854 UPD703006
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