upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 350
upd78f0114hgb-8es-a
Manufacturer Part Number
upd78f0114hgb-8es-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114HGB-8ES-A.pdf
(505 pages)
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Watchdog timer
Port pin (P130)
Port pin (P130)
Note Set P130 to high-level output by software.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
Note Set P130 to high-level output by software.
Caution A watchdog timer internal reset resets the watchdog timer.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
(except P130)
(except P130)
system clock
system clock
High-speed
reset signal
High-speed
reset signal
CPU clock
CPU clock
oscillation
oscillation
overflow
Internal
Port pin
Port pin
Internal
Internal
RESET
Internal
clock
clock
effected, the output signal of P130 can be dummy-output as the CPU reset signal.
effected, the output signal of P130 can be dummy-output as the CPU reset signal.
Normal operation
Normal operation
Figure 18-3. Timing of Reset Due to Watchdog Timer Overflow
Figure 18-2. Timing of Reset by RESET Input
Delay
CHAPTER 18 RESET FUNCTION
User’s Manual U16961EJ4V0UD
(Oscillation stop)
(Oscillation stop)
Reset period
Reset period
Delay
Operation stop
Operation stop
(17/f
(17/f
R
)
R
)
Hi-Z
Hi-Z
Normal operation
(Reset processing, internal oscillation clock)
Normal operation
(Reset processing, internal oscillation clock)
Note
Note
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