Pin Definition - Semtech E28-2G4T27SX User Manual

3.2. Pin Definition

Pin No. Pin Name
1 GND
2 NC
3 NC
4 NC
5 NC
6 NC
7 NC
8 GND
9 NC
10 GND
11 VCC
12 AUX
13 TXD
14 RXD
15 M1
16 M0
17 M2
18 GND
19 ANT
20 GND
21 GND
22 NC
.
Pin Direction
Ground Ground
- cannot be floated, can be grounded if not used
- cannot be floated, can be grounded if not used
- cannot be floated, can be grounded if not used
- cannot be floated, can be grounded if not used
- cannot be floated, can be grounded if not used
- cannot be floated, can be grounded if not used
Ground Ground
- cannot be floated, can be grounded if not used
Ground Ground
Module power source positive reference.
-
Voltage range: 2.5V ~ 5.5V DC
Used to indicate the module operation status, when user wakes up the
external MCU,it outputs low level during initialization after power on
Input and self-check, can be configured as open-drain output or push-pull
output, please refer to Parameter Configuration.
(can be floated)
TTL serial input, connected to external TXD output pin. Can be
Output configured as open-drain or pull-up input, please refer to Parameter
Configuration.
TTL serial input, connected to external TXD output pin;
Output It can be configured as drain open circuit or pull-up input. See parameter
setting for details
Input M2, M1 and M0 determine eight working modes
Input M2, M1 and M0 determine eight working modes
Input M2, M1 and M0 determine eight working modes
Ground Ground
Antenna interface (50 Ω characteristic impedance；External SMA
-
header )
Ground Ground
Ground Ground
- cannot be floated, can be grounded if not used
E28-2G4T27SX User Manual
Function
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