SX1231 SEMTECH [Semtech Corporation], SX1231 Datasheet - Page 47

• Manufacturer Part Number: SX1231
• Description: Low Power Integrated UHF Transceiver
• Manufacturer: SEMTECH [Semtech Corporation]

5.4. Continuous Mode
5.4.1. General Description
As illustrated in Figure 26, in Continuous mode the NRZ data to (from) the (de)modulator is directly accessed by the uC on
the bidirectional DIO2/DATA pin. The FIFO and packet handler are thus inactive.
5.4.2. Tx Processing
In Tx mode, a synchronous data clock for an external uC is provided on DIO1/DCLK pin. Clock timing with respect to the
data is illustrated in Figure 27. DATA is internally sampled on the rising edge of DCLK so the uC can change logic state
anytime outside the grayed out setup/hold zone.
Note
Rev 2 - Nov 2009
ADVANCED COMMUNICATIONS & SENSING
Data
DCLK
DATA
(NRZ)
the use of DCLK is required when the modulation shaping is enabled (see section 3.4.5).
Tx/Rx
Rx
SYNC
RECOG.
Figure 26. Continuous Mode Conceptual View
Figure 27. Tx Processing in Continuous Mode
T_DATA
T_DATA
CONTROL
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SPI
DATASHEET
MISO
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SCK
MOSI
NSS
SX1231
DIO0
DIO2/DATA
DIO3
DIO1/DCLK
DIO4
DIO5