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RFM95 Datasheet(PDF) 63 Page - HOPE Microelectronics CO., Ltd.

Part No. RFM95
Description  Low Power Long Range Transceiver Module
Download  121 Pages
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Maker  HOPE [HOPE Microelectronics CO., Ltd.]
Homepage  https://www.hoperf.com/
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 63 page
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Page 63
RFM95/96/97/98(W)
Tel: + 86-755-82973805
Fax: + 86-755-82973550
E-mail: sales@hoperf.com http:/ / www.hoperf.com
WIRELESS & SENSING
PRELIMINARY
DATASHEET
Rx DATA
(NRZ)
Bit N-x =
Sync_value[x]
Bit N-1 =
Sync_value[1]
Bit N =
Sync_value[0]
DCLK
SyncAddressMatch
Figure 28. Sync Word Recognition
During the comparison of the demodulated data, the first bit received is compared with bit 7 (MSB) of RegSyncValue1 and
the last bit received is compared with bit 0 (LSB) of the last byte whose address is determined by the length of the Sync
word.
When the programmed Sync word is detected the user can assume that this incoming packet is for the node and can be
processed accordingly.
SyncAddressMatch
is cleared when leaving Rx or FIFO is emptied.
Configuration
Size: Sync word size can be set from 1 to 8 bytes (i.e. 8 to 64 bits) via SyncSize in RegSyncConfig. In Packet mode this
field is also used for Sync word generation in Tx mode.
Value: The Sync word value is configured in SyncValue(63:0). In Packet mode this field is also used for Sync word
generation in Tx mode.
Note
SyncValue choices containing 0x00 bytes are not allowed
Packet Handler
The packet handler is the block used in Packet mode. Its functionality is fully described in section 4.2.13.
Control
The control block configures and controls the full chip's behavior according to the settings programmed in the configuration
registers.




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