Microchip Technology TXRX Module 868 MHZ ULP SUB GHZ MRF89XAM8A-I/RM MRF89XAM8A-I/RM Data Sheet
Product codes
MRF89XAM8A-I/RM
MRF89XAM8A
DS70651A-page 8
Preliminary
© 2010 Microchip Technology Inc.
1.3
Operation
The MRF89XAM8A module is based on the Microchip
Technology MRF89XA ultra-low power, integrated ISM
band sub-GHz transceiver IC. Serial communication
and module configuration are documented in the
“MRF89XA Ultra-Low Power, Integrated ISM Band
Sub-GHz Transceiver Data Sheet” (DS70622).
This section emphasizes operational settings that are
unique to the MRF89XAM8A module design that must
be followed in order for the module to conform to the
tested European standards summarized in
Technology MRF89XA ultra-low power, integrated ISM
band sub-GHz transceiver IC. Serial communication
and module configuration are documented in the
“MRF89XA Ultra-Low Power, Integrated ISM Band
Sub-GHz Transceiver Data Sheet” (DS70622).
This section emphasizes operational settings that are
unique to the MRF89XAM8A module design that must
be followed in order for the module to conform to the
tested European standards summarized in
.
1.3.1
RESET
Pin 2 of the module, RESET, enables an external reset
of the MRF89XA IC. RESET is connected to the TEST8
pin of the MRF89XA IC. During normal operations of
the MRF89XAM8A, the RESET pin should be held in a
high impedance state. For more information on
assertion of the RESET pin, refer to “Section 3.1.2
Manual Reset” of “MRF89XA Data Sheet” (DS70622).
of the MRF89XA IC. RESET is connected to the TEST8
pin of the MRF89XA IC. During normal operations of
the MRF89XAM8A, the RESET pin should be held in a
high impedance state. For more information on
assertion of the RESET pin, refer to “Section 3.1.2
Manual Reset” of “MRF89XA Data Sheet” (DS70622).
1.3.2
CRYSTAL FREQUENCY
When calculating frequency deviation, bit rate, receiver
bandwidth, and PLL R, P and S values, use crystal
frequency f
bandwidth, and PLL R, P and S values, use crystal
frequency f
xtal
= 12.8 MHz.
1.3.3
CLOCK OUTPUT (CLKOUT)
The CLKOUT pin 19 of the MRF89XA IC is not used on
the module. Ensure that the CLKOUT signal is disabled
to minimize current consumption.
the module. Ensure that the CLKOUT signal is disabled
to minimize current consumption.
1.3.4
FREQUENCY SHIFT KEYING
MODULATION (FSK)
MODULATION (FSK)
The following settings must be followed for FSK
modulation mode to conform to the European
standards summarized in
modulation mode to conform to the European
standards summarized in
.
• Bit Rate Maximum Setting: 40 kbps
• Frequency Deviation Maximum Setting: 40 kHz
• Transmit Bandwidth Maximum Setting: 125 kHz
• Lower Frequency Setting: 863.5 MHz
• Upper Frequency Setting: 869.5 MHz
• Frequency Deviation Maximum Setting: 40 kHz
• Transmit Bandwidth Maximum Setting: 125 kHz
• Lower Frequency Setting: 863.5 MHz
• Upper Frequency Setting: 869.5 MHz
1.3.5
ON-OFF KEYING MODULATION
(OOK)
(OOK)
The following settings must be followed for OOK
modulation mode to conform to the European
standards summarized in
modulation mode to conform to the European
standards summarized in
.
• Bit Rate Maximum Setting: 16 kbps
• Frequency Deviation Maximum Setting: 80 kHz
• Transmit Bandwidth Maximum Setting: 125 kHz
• Lower Frequency Setting: 863.5 MHz
• Upper Frequency Setting: 869.5 MHz
• Frequency Deviation Maximum Setting: 80 kHz
• Transmit Bandwidth Maximum Setting: 125 kHz
• Lower Frequency Setting: 863.5 MHz
• Upper Frequency Setting: 869.5 MHz
Note:
must be observed.