RFM23 Datasheet, PDF (152/152 Pages) –

RFM23
7. Description: Default register settings for optimal current consumption.
Impacts: Current consumption.
Workaround: Program register 57h bits 2:0 (cdcurr[2:0] = 001), register 59 bit 6 (fbdivhc = 0), register 5Ah bits
1:0 (vcocur[1:0] = 01).
Resolution: Will be fixed in the next revision.
8. Description: Register modification required for TX data-rates greater than 100 kbps.
Impacts: Eye closure and phase noise.
Workaround: Program register 58h bits 7:6 (cpcurr[1:0] = 11).
Resolution: Will update datasheet to reflect operation.
9. Description: Wake-up Timer and Low Duty Cycle Modes not functional.
Impacts: These features are not supported.
Workaround: Use the external microcontroller or the 32 kHz XTAL option on the RF22 to implement these
functions.
Resolution: Will be fixed in the next revision.
10. Description: If a false preamble is detected the chip will remain in the sync detection state indefinitely or until a
valid sync word is detected.
Impacts: RX link performance and battery life.
Workaround: Extend the preamble detection threshold to prevent false preamble detection or implement a
software work around and perform the sync timeout on the microcontroller.
Resolution: Will be fixed in the next revision.
11. Description: In antenna diversity mode the antenna selected for the RX packet may not be the same as the
subsequent TX. The TX antenna selection will toggle between both antennas.
Impacts: Might not effect link performance depending on conditions.
Workaround: If random selection of the TX antenna is not desired then a single antenna may be manually
selected by using the antdiv[2:0] register in 08h.
Resolution: Will be fixed in the next revision.
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