CHAPTER 21 POWER-ON-CLEAR CIRCUIT
Preliminary User’s Manual U16315EJ1V0UD
367
21.2 Configuration of Power-on-Clear Circuit
The block diagram of the power-on-clear circuit is shown in Figure 21-1.
Figure 21-1. Block Diagram of Power-on-Clear Circuit
–
+
Detection
voltage source
(V
POC
)
Internal reset signal
V
DD
V
DD
21.3 Operation of Power-on-Clear Circuit
In the power-on-clear circuit, the supply voltage (V
DD
) and detection voltage (V
POC
) are compared, and when V
DD
<
V
POC
, an internal reset signal is generated.
Figure 21-2. Timing of Internal Reset Signal Generation in Power-on-Clear Circuit
Time
Supply voltage (V
DD
)
POC detection voltage
(V
POC
)
2.7 V
Internal reset signal
Содержание 78K0/KD1 Series
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