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Remote Control Encoder
PT2262
Synchronous (Sync.) Bit Waveform
The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram
below:
1/8 bit width = 4α
4 bits width = 128α
Note: 1 bit = 32α
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 ~ 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.
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
A8/D3
A9/D2
A10/D1
A11/A0
SYNC. BIT
One Complete Code Word
0 Data:
1 Data:
2 Data
3 Data
4 Data
5 Data
6 Data
A0
A0
A0
A0
A0
A0
A0
A1
A1
A1
A1
A1
A1
A1
A2
A2
A2
A2
A2
A2
A2
A3
A3
A3
A3
A3
A3
A3
A4
A4
A4
A4
A4
A4
A4
A5
A5
A5
A5
A5
A5
A5
A6
A6
A6
A6
A6
A6
D5
A7
A7
A7
A7
A7
D4
D4
A8
A8
A8
A8
D3
D3
D3
A9
A9
A9
D2
D2
D2
D2
A10
A10
D1
D1
D1
D1
D1
A11
D0
D0
D0
D0
D0
D0
Sync Bit
Sync Bit
Sync.Bit
Sync.Bit
Sync.Bit
Sync.Bit
Sync.Bit
The Code Bits A0 ~ A5 and A6/D5 ~ A11/D0 are determined by the states of A0 ~ A5 and A6/D5 ~
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.
PT2262 V3.8
-5-
September, 2008
PTC [ PRINCETON TECHNOLOGY CORP ]
