TXC101 RFM, TXC101 Datasheet - Page 17

• 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 Transmit Command Register in EEPROM mode holds the count of the number of data bytes to follow. In processor mode, only
the command code is sent and the data is applied to the SDI pin WITHOUT a clock. If clock pulses are sent, the data will be
interpreted as commands. In this mode the SDI pin acts like the MOD input pin (16). See Figure 6.
The MOD pin(16) may also be used to manually send modulated data. The Oscillator and Synthesizer must manually be enabled
through the Power Management Register. Startup and settle time must be allowed before applying a modulating signal to the MOD
pin(16).
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] – Byte Count (EEPROM Mode Only): These bits are the 8-bit value of the number of data bytes to be transmitted. Before
Bit [7..0] - Command Code (Processor Mode Only): These bits are the command code that is sent serially to the processor that
Note: When manually controlling the oscillator and synthesizer turn-on, valid data can only be transmitted when the oscillator has
had time to start-up and the synthesizer has had time to lock.
Data may also be sent through the FSK pin (16). When the Transmit Command is issued the Osc and Synthesizer are
automatically enabled. If the Osc and Synthesizer are not running, there must be a delay before sending out the first bit in order to
allow the Osc to stabilize and the Synthesizer to lock. See Figure 7 timing below.
Frequency Setting Register
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Bit
15
1
Bit
14
0
issuing this command the power amplifier must be enabled either by setting the respective Power Management Register
bits PAEN bit (3) or TX0 bit (6).
written to the Transmit Command Register.
identifies the bits to be written to the Transmit Command Register.
Bit
13
1
nCS
SCK
SDI
Bit
12
0
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Freq11
Bit
11
T
T
sx
sp
is the oscillator startup time
is the synthesizer start-up and lock time
Freq10
Bit
10
[POR=A7D0h]
Figure 7. Data Transmit through FSK pin
Figure 6. Data Transmit through SDI pin
Freq9
Bit
9
Freq8
Bit
8
Freq7
Bit
7
Freq6
Bit
6
Freq5
Bit
5
Freq4
Bit
4
Freq3
Bit
3
Freq2
Bit
2
TXC101 - 4/8/08
Freq1
Bit
1
Page 17 of 27
Freq0
Bit
0