mrf89xam8a Microchip Technology Inc., mrf89xam8a Datasheet - Page 11

• Manufacturer Part Number: mrf89xam8a
• Description: 868 Mhz Ultra-low Power Sub-ghz Transceiver Module
• Manufacturer: Microchip Technology Inc.

2.0
The MRF89XAM8A module interfaces to Microchip’s
PIC16,
microcontrollers
components through digital only connections. An
example application schematic is illustrated in
Figure
2.1
The MRF89XAM8A module is based on the Microchip
Technology MRF89XA Ultra-Low Power, Integrated
ISM Band sub-GHz Transceiver IC. The serial I/O
(CSCON, CSDATA, SCK, SDO and SDI), RESET,
IRQ0 and IRQ1 pins are brought to the module pins.
Crystal X1 is a 12.8 MHz crystal with a frequency
tolerance of ±10 ppm at 25°C. The RFIO output is
matched to the SAW filter FL1 and further matched to
the PCB trace antenna.
FIGURE 2-1:
© 2010 Microchip Technology Inc.
Microcontroller
To Host
Note:
2-1.
CIRCUIT DESCRIPTION
Module Schematic
PIC18,
For battery powered applications, place a 10 μF capacitor in parallel with the 0.1 μF bypass
capacitor to provide a low impedance during startup sequences.
with
PIC24,
MRF89XAM8A APPLICATION SCHEMATIC
a
dsPIC33
minimum
1
2
3
4
6
5
CSCON
IRQ0
SDI
SCK
GND
RESET
and
of
MRF89XAMxA-I/RM
external
PIC32
U1
Preliminary
CSDATA
IRQ1
SDO
GND
GND
V
IN
Figure 2-2
Table 2-1
8
12
11
10
9
7
details the Bill of Materials (BOM).
illustrates the MRF89XAM8A schematics.
+ 3.3V
MRF89XAM8A
0.1 μF
C1
Microcontroller
To Host
DS70651A-page 9
+ C2
Note 1
1 0 μF