TRC101 RFM, TRC101 Datasheet - Page 24

• Manufacturer Part Number: TRC101
• Description: RFIC TRANCEIVER MULTI-CHANNEL FS
• Manufacturer: RFM
• Series: TRCr

Specifications of TRC101

• Frequency: 300MHz ~ 1GHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Applications: General Purpose
• Power - Output: 8dBm
• Sensitivity: -105dBm
• Voltage - Supply: 2.2 V ~ 5.4 V
• Current - Receiving: 17mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 583-1093-2

Baseband Filter Register
Bit
15
The Baseband Filter Register configures:
Bit [15..8] - Command Code: These bits are the command code that is sent serially to the processor that
identifies the bits to be written to the Baseband Filter Register.
Bit [7] – Automatic Clock Recovery Lock: When set, this bit configures the CR (clock recovery) lock
control to automatic. In this setting the clock recovery will startup in “Fast” mode and automatically switch
to “Slow” mode after locking. See Bit [6] description for details of “Fast” and “Slow” modes.
Bit [6] – Manual Clock Recovery Lock Control: When set, this bit configures the CR lock to “Fast”
mode. “Fast” mode requires a preamble of at least 6 to 8 bits to determine the clock rate, then locks.
When cleared, this bit configures the CR lock to “Slow” mode. “Slow” mode takes a little longer in that it
requires a preamble of at least 12 to 16 bits to determine the clock rate, then locks. Use of the “Slow”
mode requires more accurate bit timing. See Data Rate Setup Register for the relationship of data rate
and CR.
Bit [5] – Not Used. Write a “1”.
Bit [4] – Filter Type: When clear, this bit configures the baseband filter as a Digital filter. The Digital filter
is a digital version of a simple RC lowpass filter followed by a comparator with hysteresis. The time
constant for the Digital filter is automatically calculated internally based on the bit rate as set in the Data
Rate Setup Register.
When set, this bit configures the baseband filter as an Analog RC lowpass filter. The baseband signal is
fed to pin 7 thru an internal 10K Ohm resistor. The lowpass cutoff frequency is set by the external
capacitor connected from pin 7 to GND. To calculate the baseband capacitor value for a given data rate,
use:
Bit [3] - Not Used. Write a “1”.
Bit [2..0] – Data Quality Detect Threshold: The threshold parameter should be set less than four (<4) in
order for the Data Quality Detector to report good signal quality in the case that the bit rate is close to the
deviation. As the data rate << deviation, a higher threshold parameter is permitted and may report good
signal quality.
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©by RF Monolithics, Inc.
1
Bit
14
1
•
•
•
Bit
13
0
Clock Recovery lock control
Baseband Filter type, Digital or Analog RC
Data Quality Detect Threshold parameter
Bit
12
0
Email: [e-mail]
Bit
11
0
Bit
10
0
[POR=C22Ch]
Bit
9
1
Bit
8
0
C
Filter Type
Digital
Analog
FILT
CRLK
Bit
7
= 1 / (30,000*Data Rate)
CRLC
Bit
6
FILT (Bit 4)
Bit
0
1
5
1
FILT
Bit
4
Bit
3
1
DQLVL2
Bit
2
DQLVL1
Bit
1
TRC101 - 4/8/08
Page 24 of 42
DQLVL0
Bit
0