MRF49XA Datasheet, PDF (52/102 Pages) Microchip Technology – ISM Band Sub-GHz RF Transceiver

FIGURE 3-6:
HAM
10 MHz CLK
FIFOEN
DIO
AUTOMS<1:0>
POR
AFC CIRCUIT FOR FREQUENCY OFFSET CORRECTION
Baseband Signal IN
FINE
SEL
10 ^{Y CLK}
/4
11
MUX
Enable Calculation
Digital AFC
7
Core Logic
Auto Operation
Signals for Auto
Operation modes
Digital Limiter
If IN > MaxDEV then,
OUT = MaxDEV
7
If IN < MinDEV then,
OUT = MinDEV
ELSE,
OUT = IN
AFCCT
STSIG
OFFSB
7-Bit
<6:0> ^12-Bit
Frequency
Offset
Register
CLK CLR
ADDER
FCOR<11:0>
Corrected Frequency
Parameter to
Synthesizer
ARFO<1:0>
MFCS
Range Limit
Strobe
FOREN
Output Enable
FREQB<11:0>
Parameter from Frequency
Control Word
Strobe
Output Enable