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URL: http://www.princeton.com.tw
Remote Control Decoder
PT2272
OPERATION FLOWCHART
DECODER WITHOUT DATA OUTPUT PIN
1. When Power is turned on, PT2272 activates the Stand-By Mode.
2. It then searches for signals. If there is no signal received, it remains in the Stand-By Mode;
otherwise, the address bits received are compared with the address configuration of the pins.
3. The VT goes high signifying the validation of transmission only when there are two (2) continuous
frames that contain matched address bits; otherwise, VT will not be activated and the Stand-By
Mode remains active.
4. Then, the Address Bits are again checked. Two continuous mismatches of the address bits would
disable the VT and make the Stand-By Mode active; otherwise, the address bits are continuously
checked.
Power ON
Stand-By Mode
Disable VT
No
Signal In?
Yes
No
Address Bits
Match?
Yes
No
Address Bits
Match?
Yes
Activate VT
Yes
Address Bits
Still Match?
No
Yes
No
Address Bits
Still Match?
PT2272 V3.7
- 11 -
June, 2008
PTC [ PRINCETON TECHNOLOGY CORP ]
