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PT2604 V1.1

- 4 -

April, 2006

Remote Control Decoder IC

PT2604

FUNCTION DESCRIPTION

PT2604 may be paired with our remote control encoder -- PT2607. When PT2604 receives data

transmitted by encoders such as PT2607, it deciphers the 12 address bits and the 6 data bits. The DIN

Pin Signal activates the oscillator which in turn decodes the incoming address and data bits. Please

note under the Standby Mode, the oscillator is disabled. It is activated only if the DIN Pin is receiving

data.

PT2604 then compares the address which was received twice in a consecutive manner with its local

address. If all the data received match the local address of PT2607, the 6 bits of data are decoded and

transferred to the output pins. The VT Pin then is set to “HIGH” to indicate a that transmission is valid

until no signal or unmatched address codes are received. Please note the VT Pin is set to “HIGH” only

when there is valid transmission, otherwise, it is in “LOW” State.

Please refer to the Operation Flowchart diagram.

OPERATION FLOWCHART

Power On

Standby Mode

Code In?

Address Bits

Match?

Match

with Previously

Stored Data?

Cons ecutive

Checking?

Address or

Data Error?

NO

Disable VT &

Ignore the Res t of

This Word

YES

YES

NO

NO

Store Data

Latch Data to Output

& Activate VT

YES

YES

YES

YES

NO

NO