Specifications

10 / 20
19
P15
GPIO15，Mode indicator pin, high level working
mode, low level sleep mode
20
P20
GPIO20，Bluetooth connection status indication,
high level connection, low level disconnection
21
P18
GPIO18
22
NC
NC
23
NC
NC
24
RST
Chip reset pin
3.3 Electrical Characteristics
3.3.1 Maximum rating
Figure 4 Maximum ratings
Rated value
condition
value
unit
Storage
temperature
/
-40 to 85
°C
MAX Welding
temperature
/
260
°C
Supply voltage
IPC/JEDEC J-STD-
020
+1.8 to +3.6
V
3.3.2 Recommended working environment