Ptc Pt2262 User manual

Tel : 886-2-29162151

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Remote Control Encoder PT2262

PT2262 v3.3 Page 1Revised May 1998

Princeton Technology

Corp.

PT2262 is a remote control encoder paired with PT2272 utilizing CMOS

Technology. It encodes data and address pins into a serial coded waveform suitable

for RF or IR modulation. PT2262 has a maximum of 12 bits of tri-state address pins

providing up to 531,441 (or 312) address codes; thereby, drastically reducing any

code collision and unauthorized code scanning possibilities.

rCMOS Technology

rLow Power Consumption

rVery High Noise Immunity

rUp to 12 Tri-State Code Address Pins

rUp to 6 Data Pins

rWide Range of Operating Voltage: Vcc = 4 ~ 15 Volts

rSingle Resistor Oscillator

rLatch or Momentary Output Type

rAvailable in DIP and SO Package

rCar Security System

rGarage Door Controller

rRemote Control Fan

rHome Security/Automation System

rRemote Control Toys

rRemote Control for Industrial Use

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Tel : 886-2-29162151

Fax : 886-2-29174598

URL: http://www.princeton.com.tw

Remote Control Encoder PT2262

PT2262 v3.3 Page 2Revised May 1998

Princeton Technology

Corp.

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Tel : 886-2-29162151

Fax : 886-2-29174598

URL: http://www.princeton.com.tw

Remote Control Encoder PT2262

PT2262 v3.3 Page 3Revised May 1998

Princeton Technology

Corp.

Pin Name I/O Description Pin No.

18 Pins 20 Pins

A0 ~ A5 ICode Address Pin Nos.0 ~ 5

These six tri-state pins are detected by PT2262 to

determine the encoded waveform bit 0 ~ bit 5. Each

pin can be set to “0”, “1” or “f” (floating ).

1 ~ 6 1 ~ 6

A6/D5 ~ A11/D0 ICode Address Pin Nos.6 ~ 11/Data Pin Nos.5 ~ 0.

These six tri-state pins are detected by PT2262 to

determine the encoded waveform bit 6 ~ 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”.

7 ~ 8

10 ~ 13 7 ~ 8

12 ~ 15

TE ITransmission Enable.

Active Low Signal. PT2262 outputs the encoded

waveform to DOUT when this pin is pulled to low.

14 16

OSC 1 OOscillator Pin No.1 A resistor connected

between these two pins 15 17

OSC 2 IOscillator Pin No.2 determine the

fundamental frequency

of the PT2262.

16 18

DOUT OData Output Pin.

The encoded waveform is serially outputted to this

pin. When PT2262 is not transmitting, DOUT

outputs low (Vss) voltage.

17 19

Vcc -Positive Power Supply 18 20

Vss -Negative Power Supply 9 9

PT2262 encodes the code address and data set at A0 ~ A5 and A6/D5 ~ 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 or the IR transmitter for

transmission. The transmitted radio frequency or infrared ray is received by the RF

demodulator or IR receiver and reshaped to the special waveform. PT2272 is then

used to decode the waveform and set the corresponding output pin(s). Thus

completing a remote control encoding and decoding function.

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Remote Control Encoder PT2262

PT2262 v3.3 Page 4Revised May 1998

Princeton Technology

Corp.

ACode 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.

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:

Osc

Bit "0"

Bit "1"

Bit "f"

Floating

αα

1 bit = 32 αα

4 αα

12 αα

where : αα= Oscillating Clock Period

The Synchronous Bit Waveform is 4 bits long with 1/8 bit width

pulse. Please refer to the diagram below:

1/8 bit width = 4 αα

4 bits width = 128 αα

Note : 1 bit = 32 αα

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Remote Control Encoder PT2262

PT2262 v3.3 Page 5Revised May 1998

Princeton Technology

Corp.

A group of Code Bits is called a Code Word. A Code Word consists of 12

AD bits followed by one Sync Bit. The 12 AD bits are determined by the

corresponding states of A0 ~ A5 and A6/D5 ~ A11/D0 pins at the time of

transmission. When Data Type of PT2262 is used, the address bits will

decrease accordingly.

For example: In the 3 Data Type where the address has nine (9) bits, the

transmitting format is:

9 Address Bits 3 Data Bits Sync. Bit

PT2262 / PT2272 has a maximum of twelve (12) Address Bits including

the six (6) Address/Data bits. The following diagram shows the code bits

with their corresponding pins.

First bit transmitted

↓↓

A0 A1 A2 A3 A4 A5 A6

/D5 A7

/D4 A8

/D3 A9

/D2 A10

/D1 A11

/D0 SYNC

BIT

One Complete Code Word

0 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 Sync.Bit

1 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 D0 Sync.Bit

2 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 D1 D0 Sync.Bit

3 Data A0 A1 A2 A3 A4 A5 A6 A7 A8 D2 D1 D0 Sync.Bit

4 Data A0 A1 A2 A3 A4 A5 A6 A7 D3 D2 D1 D0 Sync.Bit

5 Data A0 A1 A2 A3 A4 A5 A6 D4 D3 D2 D1 D0 Sync.Bit

6 Data A0 A1 A2 A3 A4 A5 D5 D4 D3 D2 D1 D0 Sync.Bit

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PTC PT2262 User manual

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