Datasheet

CHAPTER 12 RESET FUNCTION
User’s Manual U18172EJ3V0UD
198
Figure 12-2. Timing of Reset by RESET Input
<1> With high-speed internal oscillation clock or external clock input
Hi-Z
RESET
Port pin
Delay
Normal operation
in progress
CPU clock
Reset period
(oscillation stops)
Normal operation (reset processing, CPU clock)
Internal reset signal
High-speed internal oscillation clock or
external clock input
Delay
Operation stops because option
byte is referenced
Note
.
100 ns (TYP.) 100 ns (TYP.)
Note The operation stop time is 277 μ s (MIN.), 544 μ s (TYP.), and 1.075 ms (MAX.).
<2> With crystal/ceramic oscillation clock (
μ PD78F920x only)
Hi-Z
RESET
Port pin
Delay
Normal operation
in progress
Reset period
(oscillation stops)
Oscillation stabilization
time (2
10
/f X to 2
17
/f X )
Normal operation
(reset processing, CPU clock)
Internal reset signal
Crystal/ceramic
oscillation clock
Delay
Operation stops because option
byte is referenced
Note
.
100 ns (TYP.) 100 ns (TYP.)
Note The operation stop time is 276
μ s (MIN.), 544 μ s (TYP.), and 1.074 ms (MAX.).
Remark f
X: System clock oscillation frequency
<R>