MRF49XA-I/ST Microchip Technology, MRF49XA-I/ST Datasheet - Page 29

• 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 2-7:
© 2009 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-11
bit 10
bit 9-8
bit 7-5
bit 4-3
R/W-1
R/W-1
RXBW<2:0>
CCB<15:11>: Command Code bits
The command code bits (10010b) are serially sent to the microcontroller to identify the bits to be
written in the RXCREG.
FINTDIO: Function Interrupt/Data Indicator Output bit
Sets the pin 16 function as the data indicator output or interrupt.
1 = DIO output
0 = INT input
DIORT<1:0>: Data Indicator Output Response Time bits
If pin 16 is selected as DIO, these bits set the response time within which the transceiver detects and
indicates the incoming synchronous bit pattern, and issues an interrupt to the host microcontroller.
11 = Continuous
10 = Slow
01 = Medium
00 = Fast
RXBW<2:0>: Receiver Baseband Bandwidth bits
These bits set the bandwidth of demodulated data. The bandwidth can accommodate different data
rates and deviations during frequency keying.
111 = Reserved
110 = 67 kHz
101 = 134 kHz
100 = 200 kHz
011 = 270 kHz
010 = 340 kHz
001 = 400 kHz
000 = Reserved
RXLNA<1:0>: Receiver LNA Gain bits
These bits, when set to different values, can accommodate environments with high interferences. The
LNA gain also affects the true RSSI value.
11 = -20 dB
10 = -14 dB
01 = -6 dB
00 = 0 dB
R/W-0
R/W-0
RXCREG: RECEIVE CONTROL REGISTER (POR: 0x9080)
CCB<15:11>
r = reserved bit
W = Writable bit
‘1’ = Bit is set
R/W-0
R/W-0
R/W-1
R/W-0
Preliminary
RXLNA<1:0>
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
R/W-0
FINTDIO
R/W-0
R/W-0
DRSSIT<2:0>
x = Bit is unknown
MRF49XA
R/W-0
R/W-0
DIORT<1:0>
DS70590B-page 27
R/W-0
R/W-0
bit 8
bit 0