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PT2272 V3.7

- 11 -

June, 2008

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

Signal In?

Address Bits

Match?

Activate VT

Address Bits

Still Match?

Address Bits

Still Match?

Yes

No

No

Yes

No

Yes

No

Yes

Yes

No

Disable VT

Address Bits

Match?