XE1202AI027TRLF Semtech, XE1202AI027TRLF Datasheet - Page 24

• Manufacturer Part Number: XE1202AI027TRLF
• Description: Narrow Band 433/868/915MHz RF Transceiver
• Manufacturer: Semtech

The typical current consumption values during the power-up sequence from Standby to Receive Mode are shown
in Table 23 as follows:
The power up sequence from sleep to transmit mode is described in Table 24:
Mode = 000
- Sleep
5.4 Transmitted Data Interface
When in transmit mode (MODE[2:0] = 111), the DATAIN signal is used as input for the on-chip modulator. DATAIN
is not sampled, so the bit duration should match the bit rate setting of the receiver. Whenever XE1202A TrueRF™
are used on both sides of the communication link, the bit rate should be one of those defined in Table 4 (BR). In
this case the bit rate error should be less than 5 % compared to the specified value.
5.5 Received Data Interface
The outputs of the receiver are the two signals DATAOUT and DCLK. When the bit “RTParam_Bits” is “1”, the bit
synchronizer is turned on, and the two output signals are respectively the output NRZ bit stream and the sampling
clock. The value of DATAOUT is valid at the rising edge of DCLK (see Figure 11 on next page):
© Semtech 2006
<1 uA
Mode= 000
Table 23: Typical current consumption profile during the power up sequence from Standby to Receive Mode
DATAIN
DATAIN
(NRZ)
(NRZ)
0.85 mA
Mode= 001
≥TS_OS
Mode = 001
- Xtal
≥TS_OS
oscillator
enabled
Table 24: Standard power up sequence from Standby to Transmit Mode
3.0 mA
Mode=010
≥TS_BBR
Mode = 110
-
-
oscillator
enabled
≥TS_FS
synthesizer
Frequency
Xtal
BIT N
BIT N
1/BR
1/BR
Figure 10: DATAIN timing
11.5 mA
Mode =011
≥TS_FS
Mode =111
- Power Amplifier
- Frequency synthesizer
-
enabled
≥TS_TR
25
XE1202A TrueRF™
Transmission
Xtal
14.0 mA
Mode = 100
≥TS_BB2
BIT N+1
BIT N+1
oscillator
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Mode=001
-
oscillator
enabled
Xtal