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PT2264 v1.0

- 5 -

June, 2004

Remote Control Encoder IC

PT2264

CODE WORD

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 ~ A7 and A8/D3 ~ A11/D0 pins at

the time of transmission. When Data Type of PT2264 is used, the address bits will decrease

accordingly.

For example: In the 4 Datas Type where the address has eight (8) bits, the transmitting format is:

8 Address Bits

4 Data Bits

Sync. Bit

PT2264 / PT2294 have a maximum of twelve (12) Address Bits, four (4) Address/Data bits. The

following diagram shows the code bits with their corresponding pins.

First bit transmitted

↓

A0

A1

A2

A3

A4

A5

A6

A7

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

The Code Bits A0 ~ A7 and A8/D3 ~ A11/D0 are determined by the states of A0 ~ A7 and A8/D3 ~

A11/D0 pins. For example, when the A0 (Pin No. 1) is set to “1” (VCC), the Code Bit A0 is synthesized

as “1” bit. In the same manner, when it (A0 Pin) is set to “0” (VSS) or left floating, the Code Bit A0 is

synthesized as a “0” or “f” bit respectively.