HF-LPS170 Wi-Fi&BLE User Manual
Shanghai High-Flying Electronics Technology Co., Ltd(www.hi-flying.com)
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UART_TX, UART_RX and GPIO_8 is also used for firmware download, must connect these three pins
out. If VDDIO is 1.8V input, then UART_TX is 1.8V TTL, UART_RX is 3.3V TTL, GPIO8 is 3.3V TTL.
If GPIO_8 default low, module boot from internal Flash, VDDIO must input 3.3V, otherwise, module
will fail to bootup. Wi-Fi and BLE driver firmware need to programmed into module, see driver for more
detail.
If GPIO_8 set to High(3.3V), module boot from external, module only support Wi-Fi function and no
power save function.
1.2.2.
Electrical Characteristics
Table3.
Electrical Characteristics
Parameter
Condition
Min.
Typ.
Max.
Unit
Work temperature range
-40
85
°C
VDD
2.6
3.3
3.6
V
VDDIO
2.6/1.62 3.3/1.8 3.6/1.98 V
Maximum soldering temperature
IPC/JEDEC J-STD-020
260
°C
ESD (Human Body Model HBM)
TAMB=25°C
2.5
KV
ESD (MM)
TAMB=25°C
0.25
KV
