SN8P1600
8-bit micro-controller
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.
VDD
External Reset
External Reset Detect Level
Internal Reset Signal
System Reset
End of External Reset
The external reset will fail, if the external reset voltage stabilizes before VDD voltage. Users must make sure the VDD
is stable earlier than external reset. The external reset circuit is a simple RC circuit as the following figure.
R
VDD
20K ohm
RST
C
MCU
0.1uF
VSS
VCC
GND
SONiX TECHNOLOGY CO., LTD
Page 39
Revision 1.94
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