XE1202A View Datasheet(PDF) - Semtech Corporation

Part Name

Description

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XE1202A

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

Semtech Corporation 

XE1202A TrueRF™

MODE[2:0]

EN

XXX

YXY

Transceiver in Mode XXX

Transceiver in Mode YXY

Figure 9: Switching mode sequence

Name

Sleep mode

Standby mode

Receiver mode

Transmitter mode

MODE(2:0) Description

000

-

001

Xtal oscillator enabled

100

Xtal oscillator, Frequency synthesizer, Receiver enabled

111

Xtal oscillator, Frequency synthesizer, Transmitter enabled

Table 20: XE1202A Main operating modes

Three additional operating modes are defined and should be used when the transceiver is switched from the

standby mode to the receiver or transmitter mode. These additional operating modes are illustrated in Table 21

below.

Name

Receiver mode

Transmitter mode

MODE(2:0)

010

011

110

Description

Xtal oscillator, Baseband enabled (first step)

Xtal oscillator, Frequency synthesizer, Baseband enabled

(first step)

Xtal oscillator, Frequency synthesizer enabled

Table 21: XE1202A Additional operating modes

The power up sequence from sleep to receiver mode is selected by setting the RTParam_WBB parameter to “0”. The

sequence is described in Table 22 below:

Mode = 000 Mode = 001 Mode = 010

- Sleep

-

Xtal

oscillator

enenabled

- Baseband

- Xtal

oscillator

enabled

≥TS_OS

≥TS_BBR

Received data valid

Mode = 011

Mode = 100

Mode=001

-

Frequency

synthesizer

- Baseband

- Xtal oscillator

enabled

- RF Front End

- Frequency synthesizer

- Baseband

-

Xtal

enabled

oscillator

-

Xtal

oscillator

enabled

≥TS_FS

≥TS_BB2

Table 22: Power up sequence from Standby to Receive Mode

© Semtech 2006

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