TXC101 RFM, TXC101 Datasheet - Page 15

• Manufacturer Part Number: TXC101
• Description: IC TX 300MHZ-1GHZ 16-TSSOP
• Manufacturer: RFM
• Series: TXr

Specifications of TXC101

• Frequency: 300MHz ~ 1GHz
• Applications: General Data Transfer
• Modulation Or Protocol: FSK, OOK
• Data Rate - Maximum: 512kbps
• Power - Output: 3dBm
• Current - Transmitting: 13mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.4 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Other names: 583-1098-2

Bit
15
1
Configuration Register
The configuration register sets up the following:
Bit [15..13] – Command Code: These bits are the command code that is sent serially to the processor that identifies the bits to be
Bit [12..11] – Band Select: These bits set the frequency band to be used. There are four (4) bands that are supported. See Table
Bit [10..8] – Clock Output Frequency: These bits set the output frequency of the on-board clock that may be used to run an
Bit [7..4] – Load Capacitance Select: These bits set the load capacitance for the crystal reference. The internal load capacitance
Bit [3] - Modulation Polarity: When clear, a logic ‘0’ is defined as the lower channel frequency and a logic ‘1’ as the higher channel
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©by RF Monolithics, Inc.
Bit
14
•
•
•
•
0
frequency (positive deviation). When set, a logic ‘0’ is defined as the higher channel frequency and a logic ‘1’ as the lower
channel frequency (negative deviation).
Frequency Band in use
Crystal Load capacitance
TX Modulation Polarity
TX Modulation Bandwidth
can be varied from 8.5pF to 16pF in 0.5pF steps to accommodate a wide range of crystal vendors and also to adjust the
reference frequency and compensate for stray capacitance that may be introduced due to PCB layout. See Table 8 for
load capacitance configuration.
Bit
13
0
written to the configuration register.
6 for Band configuration.
external host processor. See Table 7.
BAND1
Bit
12
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BAND0
Bit
11
CAP3
[POR=8080h]
0
0
0
0
1
1
CLK2
Bit
10
Frequency (MHz)
CAP2
……
Output Clock
0
0
0
0
1
1
CLK1
C
Frequency Band
Bit
9
1.25
1.66
3.33
L
2.5
10
=8.5pF + (CAP[3..0] * 0.5pF)
1
2
5
CAP1
315
433
868
916
0
0
1
1
1
1
CLK0
Bit
8
TABLE 6.
TABLE 7.
TABLE 8.
CAP0
CAP3
0
1
0
1
0
1
CLK2
Bit
7
BAND1
0
0
0
0
1
1
1
1
0
0
1
1
Crystal Load Capacitance
CAP2
Bit
CLK1
6
0
0
1
1
0
0
1
1
BAND0
0
1
0
1
CAP1
……
15.5
8.5
9.5
10
16
Bit
9
5
CLK0
0
1
0
1
0
1
0
1
CAP0
Bit
4
MODP
Bit
3
DEV2
Bit
2
TXC101 - 4/8/08
DEV1
Bit
Page 15 of 27
1
DEV0
Bit
0