MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 173

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Watchdog timer clock
source
Operation after reset
Operation mode selection The overflow time can be changed only once.
Features
Notes 1.
Remarks 1. f
2.
2. f
As long as power is being supplied, internal low-speed oscillator cannot be stopped (except in the
reset period).
The conditions under which clock supply to the watchdog timer is stopped differ depending on
the clock source of the watchdog timer.
<1> If the clock source is f
<2> If the clock source is f
Table 9-2. Option Byte Setting and Watchdog Timer Operation Mode
RL
XP
: Internal low-speed oscillation clock oscillation frequency
: X1 input clock oscillation frequency
Fixed to f
Operation starts with the maximum interval
(f
The watchdog timer cannot be stopped.
Internal Low-speed Oscillator Cannot Be Stopped
conditions.
conditions.
RL
When f
In HALT/STOP mode
During oscillation stabilization time
If the CPU clock is f
instruction
In HALT/STOP mode
/2
18
).
RL
Note 1
XP
is stopped
.
CHAPTER 9 WATCHDOG TIMER
User’s Manual U17890EJ2V0UD
XP
RL
XP
, clock supply to the watchdog timer is stopped under the following
, clock supply to the watchdog timer is stopped under the following
and if f
RL
is stopped by software before execution of the STOP
Option Byte
Operation starts with maximum interval (f
The clock selection/overflow time can be
changed only once.
The watchdog timer can be stopped
Internal Low-speed Oscillator Can Be Stopped by
Selectable by software (f
When reset is released: f
Software
XP
RL
, f
RL
or stopped)
Note 2
.
RL
/2
18
).
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