FIGURE 1-2:
MRF89XA TO MICROCONTROLLER INTERFACE (NODE) BLOCK DIAGRAM
Loop
Filter
Block
Tank
Circuit
Block
Antenna
RF Block
MRF89XA
CSDAT
I/O
PIC ? MCU
Saw
Filter
Matching
Circuitry
Block
PARS
RFIO
RF
Circuits
Baseband
Amplifier/
Filter/
Limiter
Data
Processing
Unit
Control
CSCON
SDI
SDO
SCK
I/O
SDO
SDI
SCK
Interface
IRQ0
IRQ1
INT0
INT1
Power
Management
Memory
DATA
PLOCK
CLKOUT
I/O
I/O
OSC1
Crystal Frequency = 12.8 MHz
Note:
The interface between the MRF89XA and the MCU depends on the Data mode of operation. For more information, refer to Section 3.8, Data
Processing .
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