Preliminary User’s Manual U16315EJ1V0UD
366
CHAPTER 21 POWER-ON-CLEAR CIRCUIT
21.1 Functions of Power-on-Clear Circuit
The power-on-clear circuit (POC) has the following functions.
•
Generates internal reset signal at power on.
•
Compares supply voltage (V
DD
) and detection voltage (V
POC
), and generates internal reset signal when V
DD
<
V
POC
.
•
The following can be selected by a mask option.
•
POC disabled
•
POC used (detection voltage: V
POC
= 2.85 V
±
0.15 V)
•
POC used (detection voltage: V
POC
= 3.5 V
±
0.2 V)
Caution
If an internal reset signal is generated in the POC circuit, the reset control flag register (RESF) is
cleared to 00H.
Remark
This product incorporates multiple hardware functions that generate an internal reset signal. A flag that
indicates the reset cause is located in the reset control flag register (RESF) for when an internal reset
signal is generated by the watchdog timer (WDT), low-voltage-detection (LVI) circuit, or clock monitor.
RESF is not cleared to 00H and the flag is set to 1 when an internal reset signal is generated by WDT,
LVI, or the clock monitor.
For details of the RESF, refer to
CHAPTER 19 RESET FUNCTION
.
Содержание 78K0/KD1 Series
Страница 2: ...Preliminary User s Manual U16315EJ1V0UD 2 MEMO ...
Страница 444: ...Preliminary User s Manual U16315EJ1V0UD 444 MEMO ...