MRF89XAT-I/MQ Microchip Technology, MRF89XAT-I/MQ Datasheet - Page 87
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MRF89XAT-I/MQ
Manufacturer Part Number
MRF89XAT-I/MQ
Description
RF ISM BAND TXRX 32 QFN
Manufacturer
Microchip Technology
Series
-r
Datasheet
1.MRF89XA-IMQ.pdf
(142 pages)
Specifications of MRF89XAT-I/MQ
Frequency
863MHz ~ 870MHz, 902MHz ~ 928MHz, 950MHz ~ 960MHz
Data Rate - Maximum
200 kbps
Modulation Or Protocol
FSK, OOK
Applications
ISM
Power - Output
12.5dBm
Sensitivity
-113dBm
Voltage - Supply
2.1 V ~ 3.6 V
Current - Receiving
3mA
Current - Transmitting
25mA
Data Interface
PCB, Surface Mount
Memory Size
*
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Rf Ic Case Style
QFN
No. Of Pins
32
Svhc
No SVHC (20-Jun-2011)
Rohs Compliant
Yes
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MRF89XAT-I/MQTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MRF89XAT-I/MQ
Manufacturer:
MICROCHIP
Quantity:
12 000
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3.11.0.3
This mode is necessary in applications where the
length of the packet is not known in advance and can
vary over time. It is then necessary for the transmitter
to send the length information together with each
packet in order for the receiver to operate properly.
In this mode the length of the payload, indicated by the
length byte in Figure 3-27, is given by the first byte of
the FIFO and is limited only by the width of the FIFO
selected. In this mode, the payload must contain at
least 2 bytes (that is, length plus address or message
byte).
FIGURE 3-27:
© 2010 Microchip Technology Inc.
Variable Length Packet Format
1 to 4 bytes
Preamble
Optional User provided fields which are part of the payload
Message part of the payload
Fields added by the packet handler in TX and processed and removed in RX
VARIABLE LENGTH PACKET FORMAT
1 to 4 bytes
Sync Word
Length
byte
Preliminary
CRC checksum calculation
Address
Optional DC free data coding
byte
Payload/FIFO
A variable length packet frame format is illustrated in
Figure 3-27, which contains the following fields:
• Preamble (1010...)
• Sync word (Network ID)
• Length byte
• Optional Address byte (Node ID)
• Message data
• Optional 2-bytes CRC checksum
0 to (FIFO size - 1) bytes
Note:
Length
Message
The length byte is not included in the CRC
calculation.
MRF89XA
2-bytes
CRC
DS70622B-page 87
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