TXC101 RFM, TXC101 Datasheet - Page 18

• 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

The Frequency Setting Register sets the exact frequency within the selected band for transmit or receive. Each band has a range of
frequencies available for channelization or frequency hopping. The selectable frequencies for each band are:
Bit descriptions are as follows:
Bit [15..12] – Command Code: These bits are the command code that is sent serially to the processor that identifies the bits to be
Bit [11..0] – Frequency Setting: These bits set the center frequency to be used during transmit or receive. The value of bits[11..0]
Use Table 11 to select the frequency band and substitute into the above equation to calculate the center frequency of the desired
band.
Data Rate Setup Register
The Data Rate Setup Register configures the effective transmit data rate for the transmitter.
Bit [15..8] - Command Code: These bits are the command code that is sent serially to the processor that identifies the bits to be
Bit [7..0] – Data Rate Parameter Value: These bits represent the decimal value of the 8-bit parameter used to calculate the
To calculate the BITR[7..0] decimal value for a given bit rate, use the following formula:
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©by RF Monolithics, Inc.
Bit
15
1
Bit
14
1
written to the Data Rate Setup Register.
where BITR[7..0] is the decimal value 0 to 255.
where DR
written to the Frequency Setting Register.
must be in the decimal range of 96 to 3903. Any value outside of this range will cause the previous value to be kept
and no frequency change will occur. To calculate the center frequency f
where f
expected data rate. The definable data rates range from 1.346kpbs to 344.828kbps. To calculate the expected data
rate, use the following formula:
Bit
13
0
VAL
exp
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Bit
12
= decimal value of Freq[11..0] = 96<f
is the expected data rate.
0
Bit
11
1
Frequency Band
300 MHz
400 MHz
800 MHz
900 MHz
Bit
10
0
[POR=C800h]
f
DRexp(kbps) = 10000 / [29 * (BITR[7..0]+1)]
c
Bit
9
0
= 10 * B1 * (B0 + f
BITR[7..0] = (10000 / [29 * DR
Min (MHz)
310.24
430.24
860.48
900.72
315 MHz
433 MHz
868 MHz
916 MHz
Bit
8
0
Range
TABLE 11.
BITR7
VAL
[EEPROM Mode ONLY]
Bit
7
<3903.
Max (MHz)
319.75
439.75
879.51
929.27
B1
1
1
2
3
BITR6
VAL
Bit
6
/4000) MHz
B0
31
43
43
30
exp
BITR5
Tuning Resolution
Bit
]) - 1
5
2.5 kHz
2.5 kHz
5.0 kHz
7.5 kHz
c
, use Table 11 and the following equation:
BITR4
Bit
4
BITR3
Bit
3
BITR2
Bit
2
BITR1
TXC101 - 4/8/08
Bit
1
Page 18 of 27
BITR0
Bit
0