TXC101 RFM, TXC101 Datasheet - Page 9

• 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

Another feature allows the use of two keys being pressed at the same time. For this, Bit7 in the Button
Command Register controls whether SW4 is used as a single key press or SW1 and SW2 are used as
simultaneous key presses. By setting Bit7 of the Button Command Register,
Entry point of SW4 is used for simultaneous presses of SW1 and SW2. Clearing Bit7 sets the EEPROM
to use SW4 as a single key press. It is also possible to detect multiple key presses and execute
sequential routines. When multiple keys are pressed, all routines associated with the keys are executed
in the same sequence of which the keys were pressed.
When a key is pressed, the chip looks to see if there is a debounce time to recognize before sampling the
pin again. At this time the oscillator is turned on, independent of the state of Bit 5 of the Power
Management Register, because it uses the crystal oscillator signal as a timing reference. After the
debounce time has expired, it begins execution of the code from the EEPROM address entry point.
All sources used to transmit are internal when using EEPROM mode. All external pin functions, such as
external FSK modulation, are disabled and the internal functions are used. During sleep mode, all
internal configurations are maintained as long as power is not interrupted. If there is a supply interruption
the chip reboots from the Power-up EEPROM Address Entry point and all configurations are re-written.
Example EEPROM Hex Code Contents:
The example above configures the initial settings of the registers at power-up. Other parameters may be
changed as needed when the chip recognizes a key press. The code ends in a sleep command C400h
where 00h is the number of clocks to output before disabling the clock output pin. See Sleep/Clock
Command Register.
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Address
00–01
02–03
04–05
06-07
Power-On Reset:
00000000
00000010
00000020
00000030
00000040
00000050
00000060
00000070
Command
CA
C0
C8
C4
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C0
00
00
00
00
00
00
00
Wake-up Timer Timeout
Data
Low Pulse on SW1
Low Pulse on SW2
Low Pulse on SW3
Low Pulse on SW4
C4
1E
23
64
C4
Wake-up Event
00
00
00
00
00
00
00
LBD Warning
Power up
Related Register
Power Management
Button Command
Data Rate
Sleep
CA
00
00
00
00
00
00
00
1E
00
00
00
00
00
00
00
C8
00
00
00
00
00
00
00
23
00
00
00
00
00
00
00
TABLE 3.
Crystal– Synthesizer – Power Amplifier auto on/off mode enable
Continuous execution for all keys
DR=10M/29/(35+1)~9600 bps
Power down after 64h (100) clocks
C4
00
00
00
00
00
00
00
64
00
00
00
00
00
00
00
EEPROM Address Entry
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0000h
0080h
0100h
0180h
0200h
0280h
0300h
Description
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
the EEPROM Address
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
TXC101 - 4/8/08
00
00
00
00
00
00
00
00
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