SN8P1829
8-Bit MCU build-in 12-bit ADC + PGIA + Charge-pump Reg 128 dots LCD driver
SONiX TECHNOLOGY CO., LTD
Page 40
Version 1.0
EXTERNAL RESET DESCRIPTION
The external reset is a low level active device. The reset pin receives the low voltage and resets the system. When the
voltage detects high level, it stops resetting the system. Users can use an external reset circuit to control system
operation. It is necessary that the VDD must be stable.
External Reset
VDD
Internal Reset Signal
External Reset Detect Level
End of External Reset
System Reset
Figure 6-2 External Reset Timing Diagram
Users must to be sure the VDD stable earlier than external reset (Figure 6-2) or the external reset will fail. The external
reset circuit is a simple RC circuit as following.
Figure 6-3. External Reset Circuit
Note: Please connect a 100-ohm resistance in Reset pin.
MCU
VDD
VSS
VCC
GND
RST
R
20K
ohm
C
0.1uF
100 ohm