upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 454

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Internal oscillation clock
454
Internal oscillation clock
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
Watchdog timer
Port pin (P130)
Port pin (P130)
X1 input clock
X1 input clock
(except P130)
(except P130)
reset signal
reset signal
CPU clock
CPU clock
effected, the output signal of P130 can be dummy-output as the reset signal to the CPU.
overflow
effected, the output signal of P130 can be dummy-output as the reset signal to the CPU.
Port pin
Port pin
Internal
RESET
Internal
Normal operation
Figure 22-3. Timing of Reset Due to Watchdog Timer Overflow
Normal operation
Figure 22-2. Timing of Reset by RESET Input
CHAPTER 22 RESET FUNCTION
User’s Manual U15947EJ3V1UD
Delay
(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