Initial Reset Sequence - Epson S1C17704 Technical Manual

5.2 Initial Reset Sequence

Even if the #RESET pin input negates the reset signal after power is turned on, the CPU cannot boot up until the
oscillation stabilization waiting time (1024/f
Figure 5.2.1 shows the operating sequence following cancellation of initial reset.
The CPU starts operating in synchronization with the OSC3 clock after reset state is canceled.
∗ f
: OSC3 clock frequency
OSC3
Note: The oscillation stabilization time described in this section does not include oscillation start time.
Therefore the time interval until the CPU starts executing instructions after power is turned on or
SLEEP mode is canceled may be longer than that indicated in the figure below.
OSC3 clock
#RESET
Internal reset
Internal data request
Internal data address
Figure 5.2.1 Operation Sequence Following Cancellation of Initial Reset
S1C17704 TECHNICAL MANUAL
seconds*) has elapsed.
OSC3
Reset canceled
Oscillation stabilization
waiting time
EPSON
5 INITIAL RESET
Internal reset canceled
Boot vector
Booting
5-3