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Chengdu Ebyte Electronic Technology Co,;Ltd
34
NC
35
NC
36
RXD
37
TXD
38
AUX
39
NC
40
NC
41
NC
42
TX_EN
43
RX_EN
44
RX_EN
45
TX_EN
46
GND
47
GND
48
ANT
4 Connect to MCU
No.
1
The UART module is TTL level., please collect with MCU with TTL level.
2
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
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Copyright ©2012–2019，
Reserved pin
Reserved, to be floated
Reserved pin
Reserved, to be floated
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
Input
configured as open-drain or pull-up input.
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
Output
configured as open-drain or push-pull output
The user indicates the network access status of the module, and the user notifies the
external MCU, which can be configured as drain open circuit output or push-pull
Output
output. When using, a 1K protection resistor needs to be connected in series
externally (can be suspended)
Reserved pin
Reserved, to be floated
Reserved pin
Reserved, to be floated
Reserved pin
Reserved, to be floated
Output
Internal MCU control PA pin, high level effective, connected to pin 45
Output
Internal MCU control LNA pin, high level effective, connected to pin 44
Input
Internal LNA enable pin, high level effective, connected to pin 43
Input
Internal PA enable pin, high level effective, connected to pin 42
Ground
Ground electrode
Ground
Ground electrode
Antenna (50 ohm impedance)
Description（the figure above takes STM8L MCU as an example）
E70-433NW30S user manual
6
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