XE1203F データシートの表示（PDF） - Semtech Corporation

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XE1203F

433 MHz / 868 MHz / 915 MHz Low-Power, Integrated UHF Transceiver

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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

TParam_HPF

Bits

Byte Address

Description

3

10111

Baseband filter bandwidth (DSB):

0 -> default values defined by

RTParam_BW (200 and 600 kHz)

1 -> 300kHz

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.

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