User's Manual

Specifications subject to change without notice or obligation.
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Revised 07/27/16
Long Range Wireless Solutions
TL900 Transceiver Module
TL900R ANALOG REFERENCE DESIGN
PINOUT,I2CCONFIGURATION
_______
GROUND 1 32 ANALOGIN,DtoA_OUT
+3.3VOLTSOUTPUT 2 31 SDA_MASTER
+3.3to12VOLTSINPUT 3 30 GROUND
UARTINPUTforTransmit 4 29 SCL_MASTER
UARTOUTPUTfromReceive 5 28 OUTPUT6
CTS\OUTPUT,(SLEEPEN\INPUT*) 6 27 OUTPUT5
BEEPOUTPUT 7 26 RSSI\OUT,*Dt oA_SEL
LEARN\INPUT,LEARNLED OUTPUT 8 25 OUTPUT4
BEEP\,(CONFIGRESISTORGND *) 9 24 OUTPUT3
ACK_ENABLE\INPUT* 10 23 OUTPUT2
NOTUSED,leaveunconnected. 11 22 OUTPUT1
INPUT11221SDA_SLAVE
INPUT21320SCL_SLAVE
GROUND 14 19 GROUND
INPUT31518INPUT
6
INPUT4 16 ______17 INPUT5
TL900-I2C
TL900-I2C Notes
1. A 2.2k resistor between SLEEPEN and CONFIG
RESISTOR GND will allow the unit to sleep if idle for 30
seconds.
2. A 2.2k resistor between ACK_ENABLE and CONFIG
RESISTOR GND will allow the unit to give an
acknowledgment reply after the receipt of an
acknowledgment request. For point-to-multipoint
applications only one acknowledgment should be
enabled.
3. The use of CONFIG RESISTOR GND minimizes idle
current for low power sleep mode. The resistors are
sampled on power up.
4. A 2.2k resistor between DtoA_SEL (pin 26) and
CONFIG_RESISTOR_GND will select DtoA_OUT
configuration instead of ANALOG_IN.