upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 223

• Manufacturer Part Number: upd78f0124m6gba1-8et
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Cautions 1. If data is written to WDTM, a wait cycle is generated. Do not write data to WDTM
Remarks 1. f
2. Set bits 7, 6, and 5 to 0, 1, and 1, respectively (when “Internal oscillator cannot be
3. After reset is released, WDTM can be written only once by an 8-bit memory
4. WDTM cannot be set by a 1-bit memory manipulation instruction.
5. If “Internal oscillator can be stopped by software” is selected by the mask option and
2. f
3. ×: Don’t care
4. Figures in parentheses apply to operation at f
grade products), f
R
XP
when the CPU is operating on the subsystem clock and the X1 input clock is
stopped. For details, see CHAPTER 33 CAUTIONS FOR WAIT.
stopped” is selected by a mask option, other values are ignored).
manipulation instruction. If writing is attempted a second time, an internal reset
signal is generated. If the source clock to the watchdog timer is stopped, however,
an internal reset signal is generated when the source clock to the watchdog timer
resumes operation.
the watchdog timer is stopped by setting WDCS4 to 1, the watchdog timer does not
resume operation even if WDCS4 is cleared to 0. In addition, the internal reset signal
is not generated.
: Internal oscillation clock frequency
: X1 input clock oscillation frequency
CHAPTER 10 WATCHDOG TIMER
XP
= 10 MHz.
User’s Manual U16315EJ3V1UD
R
= 480 kHz (MAX.) (standard products, (A)
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