XE1203F
5.2.8 Test Registers and additional settings
Some settings in this 9-byte register can be used to have access to additional configurations of the circuit. These
settings are described in the Table 18 below:
Name
TParam_BW
Bits
3
Byte Address
10111
Description
Baseband filter bandwidth (DSB):
0 -> default values defined by
RTParam_BW (200 and 600 kHz)
1 -> 300kHz
TParam_HPF
1-0
10111
SSB cut-off frequency of the HPF stage
(for cancellation of DC and low-frequency
offsets in the baseband circuit):
00 -> 4.3 kHz
01 -> 8.7 kHz
10 -> 17.3 kHz
11 -> 34.6 kHz
Table 18: Test registers and additional settings
5.3 OPERATING MODES
The XE1203F has four main operating modes illustrated in Table 19 below.
These modes are defined by the content of the SWParam_mode_1 parameter when configuration set #1 is
selected, or by the content of the SWParam_mode_2 parameter when configuration set #2 is selected. See also
Section 5.2.1.
Mode
Sleep mode
Standby mode
Receiver mode
Transmitter mode
SWParam_mode1(1:0)
SWParam_mode_2(1:0)
00
00
10
11
Description
-
Quartz oscillator enabled
Quartz oscillator, Frequency synthesizer, Receiver enabled
Quartz oscillator, Frequency synthesizer, Transmitter enabled
Table 19: XE1203F Operating Modes
5.3.1 Standard power up sequence for the receiver and transmitter
The XE1203F circuit can be switched between any configuration by using the 3 wire interface (ConfigSwitch) or by
using the pad SWITCH. This section describes the switching sequence of the chip. Figure 18 shows the transition
sequence from sleep mode to receiver mode via stand by mode.
? Semtech 2008
28
www.semtech.com
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