MRF49XA-I/ST Microchip Technology, MRF49XA-I/ST Datasheet - Page 28

• Manufacturer Part Number: MRF49XA-I/ST
• Description: IC RF TXRX 433/868/915 16-TSSOP
• Manufacturer: Microchip Technology

Specifications of MRF49XA-I/ST

• Package / Case: 16-TSSOP
• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FHSS, FSK
• Applications: Home / Industrial Automation, Remote Access, Security Alarms
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.8 V
• Current - Receiving: 11mA
• Current - Transmitting: 15mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Number Of Receivers: 1
• Number Of Transmitters: 2
• Wireless Frequency: 433 MHz to 915 MHz
• Output Power: + 7 dBm
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Modulation: FHSS, FSK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 579-MRF49XA-1/ST

REGISTER 2-6:
EQUATION 2-2:
TABLE 2-6:
TABLE 2-7:
DS70590B-page 26
MRF49XA
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-12
bit 11-0
Note 1:
Frequency Band (MHz)
F
where:
F
0
VAL
R/W-1
R/W-1
= 10 x FA1 x (FA0 + F
= Decimal Value of FREQB<11:0> = 96 < F
To calculate the center frequency (F0), use Equation 2-2 and the values from Table 2-6. The CFSREG
sets the frequency within the selected band for transmit or receive. Each band has a range of frequencies
available for changing channels or frequency hopping. The selectable frequencies for each band are given
in Table 2-7.
400
800
900
433 MHz
868 MHz
915 MHz
Range
CCB<15:12>: Command Code bits
The command code bits (1010b) are serially sent to the microcontroller to identify the bits to be written
in the CFSREG.
FREQB<11:0>: Center Frequency Set bits
These bits set the center frequency to be used during transmit or receive. The 12-bit value (F
be in a decimal range of 96 to 3903. The value outside this range results in the previous value being
retained and used such that no frequency change occurs
CENTER FREQUENCY VALUE
FREQUENCY BAND TUNING RESOLUTION
R/W-0
R/W-0
CFSREG: CENTER FREQUENCY VALUE SET REGISTER (POR: 0xA680)
CCB<15:12>
VAL
/4000) MHz
r = reserved bit
W = Writable bit
‘1’ = Bit is set
R/W-1
R/W-0
Min. (MHz)
430.2400
860.4800
900.7200
VAL
R/W-0
R/W-0
Preliminary
< 3903
FREQB<7:0>
FA1
1
2
3
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
R/W-0
Max. (MHz)
439.7575
879.5150
929.2725
(1)
.
R/W-1
R/W-0
FREQB<11:8>
© 2009 Microchip Technology Inc.
x = Bit is unknown
Tuning Resolution (kHz)
R/W-1
R/W-0
FA0
43
43
30
2.5
5.0
7.5
VAL
R/W-0
R/W-0
) must
bit 8
bit 0