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RFM64W Datasheet, PDF (47/75 Pages) List of Unclassifed Manufacturers – ISM TRANSCEIVER MODULE | |||
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ADVANCED COMMUNICATIONS & SENSING
5.4.5. uC Connections
RFM64W
IRQ_0
IRQ_1
NSS_CONFIG
NSS_DATA
SCK
MOSI
MISO
uC
RFM 64W
Figure 41: uC Connections in Buffered Mode
Note that depending upon the application, some uC connections may not be needed:
ÂIRQ_0: if none of the relevant IRQ sources are used. In this case, leave floating.
ÂIRQ_1: if none of the relevant IRQ sources are used. In this case, leave floating.
ÂMISO: if no read register access is needed and the module is used in Tx mode only. In this case, pull up to
VDD through a 100 k⦠resistor.
In addition, DATA pin (unused in buffered mode) should be pulled-up to VDD through a 100 k⦠resistor.
Please refer to Table 13 for the RFM64Wâs pin configuration.
5.4.6. Buffered Mode Example
 Configure all data processing related registers listed below appropriately. In this example we assume Sync
word recognition is on and Fifo_fill_method=0.
MCParam
IRQParam
RXParam
SYNCParam
Data_mode_x
Fifo_size
Fifo_thresh
Rx_stby_irq_0
Rx_stby_irq_1
Tx_irq_1
Fifo_fill_method
Fifo_fill
Tx_start_irq_0
Sync_size
Sync_tol
Sync_value
Tx
Rx
Description
X
X Defines data operation mode (=>Buffered)
X
X Defines FIFO size
X
X Defines FIFO threshold
X Defines IRQ_0 source in Rx & Stby modes
X Defines IRQ_1 source in Rx & Stby modes
X
Defines IRQ_1 source in Tx mode
X Defines FIFO filling method
X Controls FIFO filling status
X
Defines Tx start condition and IRQ_0 source
X Defines Sync word size
X Defines the error tolerance on Sync word detection
X Defines Sync word value
Table 22: Relevant Configuration Registers in Buffered Mode (data processing related only)
Tx Mode:
 Program Tx start condition and IRQs: Start Tx when FIFO is not empty (Tx_start_irq_0=1) and IRQ_1 mapped
to Tx_done (Tx_irq_1=1)
 Go to Tx mode (and wait for Tx to be ready, see Figure 50)
Page 47 of 75
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