STC micro STC8A8K64D4 Series - Low Voltage Reset (RSTCFG); Low Voltage Power-On Reset Reference Circuit (Generally Not Required); Low Voltage Button Reset Reference Circuit

STC8A8K64D4 Series Manual
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6.3.3 Low voltage reset (RSTCFG)
RSTCFG (Reset Configuration Register)
Symbol
Address
B7
B6
B5
B4
B3
B2
B1
B0
RSTCFG
FFH
-
ENLVR
-
P54RST
-
-
LVDS[1:0]
ENLVR: Low voltage detection reset enable bit
0: Disable low voltage detection reset. When the system detects a low-voltage event, a low-voltage interrupt will occur.
1: Enable low voltage detection reset. When the system detects a low-voltage event, it will reset automatically.
P54RST: RST pin function selection bit
0: RST pin is used as common I/O (P5.4).
1: RST pin is used as reset pin. (Low-level reset)
LVDS[1:0] : Low voltage detection threshold voltage setting bits
LVDS[1:0]
Low voltage detection threshold voltage
00
2.0V
01
2.4V
10
2.7V
11
3.0V
6.3.4 Low voltage power-on reset reference circuit (generally not required)
Vcc
10K
301R
10uF
P5.4-RST
low voltage reset
optional
6.3.5 Low voltage button reset reference circuit
301R
P5.4-RST
low voltage reset