TRC105 RFM, TRC105 Datasheet - Page 61

• Manufacturer Part Number: TRC105
• Description: IC TXRX 300MHZ-510MHZ 32TQFN
• Manufacturer: RFM

Specifications of TRC105

• Frequency: 300MHz ~ 510MHz
• Data Rate - Maximum: 200kbps
• Modulation Or Protocol: FSK, OOK
• Applications: General Purpose
• Power - Output: 13dBm
• Sensitivity: -112dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 3mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFN
• Wireless Frequency: 300 MHz to 510 MHz
• Output Power: 13 dBm
• Operating Supply Voltage: 2.1 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 1.7 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, OOK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 583-1159-2

MCFG0C bits 7..6 set the length of the FIFO as shown in Table 83. The length of the FIFO must be equal to or
greater than the maximum payload length set in PKTCFG1C, as discussed below.
The integer value of MCFG0C bits 5..0 + 1 sets the FIFO interrupt threshold. When receiving in Packet data
mode, FIFO_Int_Rx is triggered when the number of bytes in the FIFO is equal to or greater than the threshold.
FIFO_Int_Tx is triggered when the number of bytes in the FIFO is equal to or less than the threshold value. Two
additional interrupts, nFIFOEMPY and FIFOFULL provide signaling that a packet transmission is complete or a
full packet has been received respectively.
Packet data mode formats are discussed in Section 3.9. Packet data mode options are configured in registers
PKTCFG1C through PKTCFG1F. Setting PKTCFG1C bit 7 to 1 selects Manchester encoding/decoding. Man-
chester encoding provides excellent DC-balance and other characteristics that support robust communications,
but effectively doubles the number of bits needed to transmit the packet payload. Scrambling provides adequate
DC-balance in many applications without doubling the number of bits in the payload. It is not necessary to enable
both Manchester encoding and scrambling. PKTCFG1C bits 6..0 configure the payload size (not including the
preamble and start pattern) in fixed format and maximum allowed length byte value in variable length and ex-
tended variable length formats. In a variable length format, a received packet with a length byte value greater than
the maximum allowed is discarded. PKTCFG1D bits 7..0 hold the node address byte used to identify a specific
radio in a network.
PKTCFG1D bits 7..0 hold the node address byte used to identify a specific radio in a network. PKTCFG1E bit 7
configures the basic packet format. Setting this bit to 0 selects the fixed-length format, and setting this bit to 1 se-
lects the variable length format. PKTCFG1E bits 6..5 set the preamble length:
For most applications a preamble length of three or four bytes is recommended. PKTCFG1E bit 4 controls DC-
balanced scrambling. Setting this bit to 1 enables scrambling. PKTCFG1E bit 3 controls CRC calculations. Setting
his bit to 1 enables CRC calculations. PKTCFG1E bits 2..1 configure node address filtering:
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PKTCFG1E bits 2..1
00
01
10
11
PKTCFG1E bits 6..5
MCFG0C bits 7..6
Technical support +1.800.704.6079
00
01
10
11
00
01
10
11
node address, 0x00 and 0xFF accepted
Table 83
Table 84
Table 85
node address and 0x00 accepted
only node address accepted
Node Address Filtering
Preamble Length
FIFO Length
no filtering
16 bytes
32 bytes
48 bytes
64 bytes
2 bytes
3 bytes
4 bytes
1 byte
TRC105 - 11/01/10
Page 61 of 66