sx1240 Semtech Corporation, sx1240 Datasheet - Page 8

• Manufacturer Part Number: sx1240
• Description: Sx1240 - Low Cost Integrated Transmitter Ic 434 Mhz And 868 Mhz Band Rf Transmitter
• Manufacturer: Semtech Corporation

3. Application Modes
The SX1240 has two application modes. These are selected depending upon the load presented to the Control pin (6) at
power-on of the device, as shown on Figure 3. By connecting the Control pin to logical ‘0’ or ‘1’ the Power & Go mode is
selected. A full description of operation in this mode is given in Section 3.1. By presenting a logical zero to the Control
input, Advanced Mode can be accessed by subsequent clocking of the control pin, in conjunction with the Data pin (2)
permits programming of the SX1240 configuration register and manual control of the transmitter. For more information on
Advanced Mode operation please consult Section 3.2. The diagram below summarises the mode selection process.
Table 6
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Control Pin Selection of the Application Mode
Logic ‘0’ then Clock on CTRL
Logic ‘1’ or ‘0’
CTRL Pin (6)
Figure 3. SX1240 Mode Selection
Page 8
Power & Go Mode (see Section 3.1)
Advanced Mode (see Section 3.2)
Application Mode
Integrated Transmitter IC
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SX1240