TRC103 RFM, TRC103 Datasheet - Page 59

• Manufacturer Part Number: TRC103
• Description: RFIC TRANSCEIVER MULTI-CHANNEL F
• Manufacturer: RFM
• Series: TRCr

Specifications of TRC103

• Frequency: 863MHz ~ 960MHz
• Data Rate - Maximum: 100kbps
• Modulation Or Protocol: FSK, OOK
• Applications: General Purpose
• Power - Output: 11dBm
• Sensitivity: -112dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 4mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 583-1095-2

MCFG05 bits 7..6 set the length of the FIFO as shown in Table 78. The length of the FIFO must be equal to or
greater than the packet payload length set in PKTCFG1C, as discussed below.
The integer value of MCFG05 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.
PKTCFG1E bit 7 configures the basic packet format. Setting this bit to 0 selects the fixed-length format, and set-
ting this bit to 1 selects 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
MCFG05 bits 7..6
Technical support +1.800.704.6079
00
01
10
11
00
01
10
11
node address, 0x00 and 0xFF accepted
Table 78
Table 79
Table 80
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
TRC103 - 12/15/10
Page 59 of 64