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SX1240
Integrated Transmitter IC
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
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.
Figure 3. SX1240 Mode Selection
Table 6
Control Pin Selection of the Application Mode
CTRL Pin (6)
Logic ‘1’ or ‘0’
Logic ‘0’ then Clock on CTRL
Application Mode
Power & Go Mode (see Section 3.1)
Advanced Mode (see Section 3.2)
SX1240, Rev 1, Oct 2010
?2010 Semtech Corp.
Page 8
www.semtech.com
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