SX1243 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SX1243

Low Cost Low Current Integrated Transmitter 310 to 928MHz Frequency Agile

Semtech Corporation 

WIRELESS & SENSING

4.2. Mode Selection Flowchart

Circuit Start-up

Wait T_Start

SX1243

Integrated Transmitter IC

DATASHEET

Logic ‘0’

Check

CTRL Pin

Logic ‘1’

Power & Go 1

868.3 MHz

FSK, Fdev=+/-19.2kHz

+10dBm

Power & Go 2

433.92 MHz

OOK

+10dBm

CTRL Clock signal

Advanced Mode

Full register flexibility

Automatic or forced Transmit

Figure 4. SX1243 Mode Selection

Note Advanced mode is entered only if DATA is held low during CTRL’s rising edge.

When powering up the circuit (microcontroller and SX1243), the logic level of the CTRL pin is sampled after T_START, as

described on Figure 5. During T_START, the microcontroller IO driving the CTRL pin must be configured as an output,

driving the CTRL pin to the desired state.

SX1243, Rev 3, May 2012

©2012 Semtech Corporation

Figure 5. Power-up Timing

Page 10

www.semtech.com

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