XE1203F 查看數據表（PDF） - Semtech Corporation

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XE1203F

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

Semtech Corporation 

XE1203F

Programmed

mode

SLEEP -> STAND_BY -> RECEIVER

SLEEP

STAND_BY

RECEIVER

EN

Actual mode

SLEEP

TS_OS

STAND_BY

TS_RE

RECEIVER

SLEEP -> STAND_BY -> TRANSMITTER

Programmed SLEEP

mode

STAND_BY

TRANSMITTER

EN

Actual mode

SLEEP

TS_OS

STAND_BY

TS_TR

TRANSMITTER

Programmed

mode

EN

Actual mode

TRANSMITTER -> RECEIVER

TRANSMITTER

RECEIVER

TRANSMITTER

TS_RE

RECEIVER

Programmed

mode

EN

Actual mode

RECEIVER -> TRANSMITTER

RECEIVER

TRANSMITTER

RECEIVER

TS_TR

TRANSMITTER

Figure 18: Mode transition

5.4 SELECTION OF THE REFERENCE FREQUENCY

The reference clock used by the frequency synthesizer and internal digital circuit can be generated internally by

connecting an external crystal between XTA and XTB, or provided by an external oscillator. When using an external

source, the signal should be applied to port XTA and the RTParam_Osc configuration bit should be set to “1”.

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