Configuration Of Power-On-Clear Circuit; Operation Of Power-On-Clear Circuit - NEC 78K0 User Manual

20.2 Configuration of Power-on-Clear Circuit

The block diagram of the power-on-clear circuit is shown in Figure 20-1.
Mask option

20.3 Operation of Power-on-Clear Circuit

In the power-on-clear circuit, the supply voltage (V
V , an internal reset signal is generated.
POC
Figure 20-2. Timing of Internal Reset Signal Generation in Power-on-Clear Circuit
Supply voltage (V )
DD
POC detection voltage
(V )
POC
2.7 V
Internal reset signal
360
CHAPTER 20 POWER-ON-CLEAR CIRCUIT
Figure 20-1. Block Diagram of Power-on-Clear Circuit
V V
DD DD
Detection
voltage source
(V )
POC
User's Manual U16227EJ2V0UD
+
−
) and detection voltage (V
DD
Internal reset signal
) are compared, and when V
POC
<
DD
Time