User’s Manual U16896EJ2V0UD
618
CHAPTER 23 POWER-ON-CLEAR CIRCUIT
23.1 Function
The power-on-clear (POC) circuit has the following functions.
•
Generates a reset signal (POCRES) upon power application.
•
Compares the supply voltage (V
DD
) and detection voltage (V
POC
), and generates a reset signal (POCRES) when
V
DD
< V
POC
(detection voltage: V
POC
= 2.6 V
±
0.1 V).
Caution If the POCRES signal is generated by the POC circuit, the RESF register is cleared (to 00H).
23.2 Configuration
A block diagram of the power-on-clear circuit is shown below.
Figure 23-1. Block Diagram of Power-on-Clear Circuit
−
+
Detection voltage
source (
V
POC
)
Reset signal
(
POCRES)
V
DD