FRIENDCOM WSN27-915R Manual del usuario - Página 4

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3 PIN DESCRIPTION

INTERFACE PINS DEFINITION
Pin
Symbol
1
GND
2
ANT
3
GND
4
RXD1
5
TXD1`
6
RXD0
7
TXD0
8
GND
9
+3.3V
10
IOA7
11
IOA6
12
Boot
13
RESET
14
IOE4
Name
RF Gnd
RF Port
RF Gnd
Debug UART1
Debug UART1
APP UART0
APP UART0
Power Gnd
Power supply
Communication
Indicator
Communication
Indicator
Startup control
Reset
Communication
Connected to power ground
Module RF output, external antenna
Connected to power ground
Module debug serial port data receiving end, connecting
user data sending end, RSTTL level, 3.3V
Module debug serial port data sending end, connecting
user data receiving end, RSTTL level, 3.3V
The module communicates with the data receiving end of
the serial port of the external device and connects with the
user data sending end, with RSTTL level of 3.3V
The module communicates with the data sending end of
the serial port of the external device and connects with the
user data receiving end, with RSTTL level of 3.3V
External power supply cathode
External power supply positive pole, voltage 3.3V, power
supply load current at least 1A
Low level when sending data, external LED indicator
Low level when receiving data, external LED indicator
Start mode selection, internal is pulled down, embedded
flash boot when Boot=0, Boot=1 internal ROM boot,
Reset RF module at low level
Network indication, output low level, external LED indicator
Definition
4