Remote Control Encoder PT2260 DESCRIPTION
PT2260 is a remote control encoder paired with either PT2270 or PT2272 utilizing CMOS Technology. It encodes data and address pins into a serial coded waveform suitable for RF modulation. PT2260 has a maximum of 10 bits tri-state address pins providing up to 59,049 (or 310) address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities.
PT2260 is one of the first generation of Encoder/Decoder ICs that utilizes the unique PTC Technology.  When paired with PT2270, this encoder/decoder (PT2260/PT2270) pair can operate at very wide temperature range (see Features). Thus, this very important feature enables your Encoder/Decoder to operate under the worst environmental condition.
FEATURES
•High performance CMOS technology
•Low power consumption
•Very high noise immunity
•Wide operating temperature range: -40℃ ~ 85℃
•8 or 10 Tri-State code address pins
•  2 or 4 data pins
•Wider range of operating voltage: 1.8 ~ 10.0V
•Single resistor oscillator
•Least external components
APPLICATIONS
•Home/Car security system
•Garage door controller
•Remote fan controller
•Remote control toys
Remote Control Encoder PT2260 BLOCK DIAGRAM
Address/ Data
System
Timing
Control
Logic
Code Generation
A0
A1
A2
A3
A4
A5
A6
A7 A8/D3 A9/D2
D1
D0
OSC
DOUT OSC
Remote Control Encoder
PT2260
PIN CONFIGURATION
A0A1A2V C C V S S
DOUT OSC A5D2A6A3D0D3A4D1PT2260-R4
A7
A0A1A2V C C V S S
DOUT OSC
A5A9A6A3D0A8A4D1PT2260-R2
A7
Remote Control Encoder  PT2260
PIN CONFIGURATION
Pin Name
I/O
Description
Pin No. A0 ~ A7 I
Code Address Pin Nos. 0 ~ 7
These eight tri-state pins are detected by PT2260 to
determine the encoded waveform bit 0 ~ bit 7. Each bit can be set to “0”, “1”, or “f” (floating).
1 ~ 8
A8/D3 ~ A9/D2 I/PL* Code Address Pin No. 8 ~ 9/Data Pin No. 3 ~ 2. These two tri-state pins are detected by PT2260 to
determine the encoded waveform bit 8 ~ bit 9. When these
pins are used as address pins (as in PT2260-R2), they can
be set to “0”, “1”, or “f” (floating).  When these pins are used as data pins (as in PT2260-R4), they can only be set to “0” or “1”.
10 ~ 11
D1, D0 I/PL
Data Pin No. 1/0.
These pins can only be set to “0” or “1” 12, 13 OSC I Oscillator Pin
A resistor connected between the Osc Pin and the Vcc
determines the fundamental frequency of the PT2260 14
DOUT O
Data Output Pin.
The encoded waveform is serially outputted to this pin.
When PT2260 is not transmitting, DOUT outputs low (Vss) voltage
15 Vcc  Positive Power Supply 16
Vss  Negative Power Supply 9
Note:
PL -- Pull-low Resistor is connected internally
PL* -- If those two pins are used as Data Pins (PT2260-R2), pull-low resistor is connected internally;            otherwise, no pull-low resistor is connected.
Remote Control Encoder  PT2260
FUNCTION DESCRIPTION
PT2260 encodes the code address and data set at A0 ~ A7, A8/D3, A9/D2, D1 and D0 into a special waveform and outputs it to the DOUT when any of the data pins is tied to high. This waveform is fed to the RF modulator for transmission. The transmitted radio frequency is received by the RF demodulator and reshaped into the special waveform. PT2270 (or PT2272) is then used to decode the waveform and set the corresponding output pin(s). Thus completing a remote control encoding and decoding function.
RF OPERATION
CODE BITS
A Code Bit is the basic component of the encoded waveform, and can be classified as either an AD (Address/Data) Bit or a SYNC (Synchronous) Bit.
Address/Data (AD) Bit Waveform
An AD Bit can be designated as Bit “0”, “1”, or “f” if it is in low, high or floating state respectively. One bit waveform consists of 2 pulse cycles. Each pulse cycle has 512 oscillating clock periods. For further details, please refer to the diagram below:
α
1 b it = 1024α
128α
128α
384α
O SC
Bit"0"Bit"1"
Bit"f"Flo a ting
where: α=Oscillating Clock Period
Synchronous (Sync.) Bit Waveform
remote controlThe Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:
Note: 1 bit=1024α

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。