XE1209 Ver la hoja de datos (PDF) - Semtech Corporation

Número de pieza

componentes Descripción

Fabricante

XE1209

30 – 70 kH Ultra Low Power CMOS Transceiver

Semtech Corporation 

XE1209

Ultra Low Power CMOS Transceiver

Name Description

FC

Carrier frequency

TR

Transmission flag

P0

P1

P2

SENS

TEST

OSC

Power level

Power level

Power level

Carrier detector threshold

Test flag

Oscillator flag

Convention

0

1

36.86 kHz

45.05 kHz

Mode M1 (RE=0)

Mode M3 (RE=0)

Mode M2 (RE=1)

Mode M4 (RE=1)

LSB

(see Table 3)

MSB

200 µV

500 µV

Normal mode

Test mode

External oscillator

Internal oscillator

Table 2 Configuration register

Correspondence between the word {P2 P1 P0} and the current sinked by the power amplifier is shown below. The

words 110 and 111 are reserved for test purposes.

P2 P1 P0

000

001

010

011

100

101

Power amplifier

current

1.8 mA

3.5 mA

7.5 mA

30 mA

60 mA

110 mA

Table 3 Sink current levels

TR (register)

0

0

1

1

RE (input pin)

0

1

0

1

Mode

M1 (standby)

M2 (carrier detector)

M3 (transmitter)

M4 (receiver)

Table 4 Mode selection

Upon start-up, a reset of the XE1209 is required to set the configuration register in a proper default mode. This is done

by sending the binary word 'b00000000 to the circuit using the 3-wire bus, while setting RE to “0”.

© Semtech 2005

www.semtech.com

9

Share Link: