AX5031
www.onsemi.com
16
Table 17. CONTROL REGISTER MAP
Addr Description
Bit
ResetDirNameAddr Description
01234567
ResetDirName
22 FREQ1 RW 11001100 FREQ(15:8) Synthesizer Frequency
23 FREQ0 RW 11001101 FREQ(7:0) Synthesizer Frequency
25 FSKDEV2 RW 00000010 FSKDEV(23:16) FSK Frequency Deviation
26 FSKDEV1 RW 01100110 FSKDEV(15:8) FSK Frequency Deviation
27 FSKDEV0 RW 01100110 FSKDEV(7:0) FSK Frequency Deviation
2C PLLLOOP RW 00011101 FREQS
EL
reserved BANDSEL PLLCPI(2:0) FLT(1:0) Synthesizer Loop Filter
Settings
2D PLLRANGING RW 00001000 STICKY
LOCK
PLL
LOCK
RNGERR RNG
START
VCOR(3:0) Synthesizer VCO
Auto−Ranging
Transmitter
30
TXPWR RW −−−−1000 – – – – TXRNG(3:0) Transmit Power
31 TXRATEHI RW 00001001 TXRATE(23:16) Transmitter Bitrate
32 TXRATEMID RW 10011001 TXRATE(15:8) Transmitter Bitrate
33 TXRATELO RW 10011010 TXRATE(7:0) Transmitter Bitrate
34 MODMISC RW ––––––11 – – – – – – reserved PTTLCK
GATE
Misc RF Flags
FIFO, Part 2
35
FIFOCOUNT R −−000000 – – FIFOCOUNT(5:0) FIFO Fill state
36 FIFOTHRESH RW −−000000 – – FIFOTHRESH(5:0) FIFO Threshold
37 FIFOCONTROL
2
RW 0−−−−−00 CLEAR – – – – – STOPONERR
(1:0)
Additional FIFO control
Crystal Oscillator, Part 2
4F
XTALCAP RW −−000000 – – XTALCAP(5:0) Crystal oscillator tuning
capacitance
4−FSK Control
50
FOURFSK RW −−−−−−−0 – – – – – – FOURFSKENA 4−FSK Control
