Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Encoder IC
PT2264
DESCRIPTION
PT2264 is a remote control encoder paired with PT2294 utilizing CMOS Technology. It encodes data
and address pins into a serial coded waveform suitable for RF modulation. PT2264 has a maximum of
12-bit of tri-state address pins providing up to 531,441 (or 3
12
) address codes; thereby, drastically
reducing any code collision and unauthorized code scanning possibilities.
FEATURES
•
•
•
•
•
•
•
•
•
CMOS technology
Low power consumption
Very high noise immunity
Up to 12 Tri-State code address pins
Up to 4 data pins
Wide range of operating voltage: VCC=8 ~ 15V
Single resistor oscillator
Latch or momentary output type
Available in DIP and SOP package
APPLICATIONS
•
•
•
•
Remote control fan
Home security/Automation system
Remote control toys
Remote control for door bell
PT2264 V1.1
-1-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Encoder IC
PT2264
BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
A8/D3
A9/D2
A 10/D1
A 11/D0
Code
Generation
DOUT
Address
Control
Logic
/TE
System
Timing
OSC1
OSC2
OSC
PT2264 V1.1
-2-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Encoder IC
PT2264
PIN CONFIGURATION
A0
A1
A2
A3
A4
A5
A6
A7
VSS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
PT 2264
P T2264-18S
VC C
DOUT
OSC2
OSC1
/TE
A11/D0
A10/D1
A9/D2
A8/D3
A0
A1
A2
A3
A4
A5
A6
A7
VSS
NC
1
2
3
4
5
6
7
8
9
10
PT 2264-S
20
19
18
17
16
15
14
13
12
11
VC C
DOUT
OSC2
OSC1
/TE
A11/D0
A10/D1
A9/D2
A8/D3
NC
PT2264 V1.1
-3-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Encoder IC
PT2264
PIN DESCRIPTION
Pin Name
A0 ~ A7
I/O
I
Description
Code Address Pin No.0 ~ 7
These ten tri-state pins are detected by PT2264 to
determine the encoded waveform bit 0 ~ bit 9. Each
pin can be set to “0”, “1” or “f” (floating).
Code Address Pin Nos.8 ~ 11/Data Pin No.0 ~ 3.
These four tri-state pins are detected by PT2264 to
determine the encoded waveform bit 10, bit 11.
When these pins are used as address pins, they can
be set to “0”, “1”, or “f” (floating).
When these pins are used as data pins, they can be
set only to “0” or “1”.
Transmission Enable.
Active Low Signal. PT2264 outputs the encoded
waveform to DOUT when this pin is pulled to low.
A resistor connected between
Oscillator Pin No.1
these two pins determine the
fundamental frequency of the
Oscillator Pin No.2
PT2264.
Data Output Pin.
The encoded waveform is serially outputted to this pin.
When PT2264 is not transmitting, DOUT outputs low
(VSS) voltage.
Positive Power Supply
Negative Power Supply
Pin No.
18 Pins 20 Pins
1~8
1~8
A8/D3 ~ A11/D0
I
10 ~ 13
12 ~ 15
/TE
OSC1
OSC2
DOUT
VCC
VSS
I
O
I
O
-
-
14
15
16
17
18
9
16
17
18
19
20
9
PT2264 V1.1
-4-
April, 2006
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Remote Control Encoder IC
PT2264
FUNCTION DESCRIPTION
PT2264 encodes the code address and data set at A0 ~ A7 and A8/D3 ~ A11/D0 into a special
waveform and outputs it to the DOUT when /TE is pulled to “0” (Low State). This waveform is fed to
either the RF modulator for transmission. The transmitted radio frequency is received by the RF
demodulator receiver and reshaped to the special waveform. PT2294 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 16 oscillating time periods. For further
details, please refer to the diagram below:
α
OSC
1 bi t = 32α
B IT 0
4α
B IT 1
12
α
BIT f
F l oati ng
4α
where:
α=Oscillating
Clock Period
Synchronous (Sync.) Bit Waveform
The Synchronous Bit Waveform is 4-bit long with 1/8 bit width pulse. Please refer to the diagram below:
1/8 b it w idth =4
α
4 bi t wi dth= 12 8α
Note: 1-bit=32α
PT2264 V1.1
-5-
April, 2006
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