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4K10N Rev. F001

Active RFID IC for 8 Columns × 8 Rows

keyboard remote controller

ECF300

Function block diagram

Function description

The ECF300 consists of an power block, digital block and RF block. The power block can be used to support working

voltage to the digital and transmitter block. The digital block is to provide a control code and series number to the RF

block. The RF block is used to be the carrier generator with command signal which is come from digital part. And it can

be adjusted the output power by using different RES(R1) value. The output power is raised if the Res become smaller.

There are two operation modes in the ECF300. One is Transmitting mode and the other is Writing mode. The function

of transmitting mode is to transmit control code and series number to the device. There are 256 different kinds of

control code, included of double key and over 40 billion kinds of series number. The device will work when the series

number is matching between the device and remote controller. The process of Transmitting mode is as following:

When user pulls the button then:

1.

Access SN data from memory.

2.

Creating command form: leading zero + preamble +data +SN +Check sum.

3.

Encoding PWM form.

4.

Transmit the command by transmitter.

The process of writing SN mode process is as following:

1. RXCLK = 8KHz then the mode is changed to Writing SN mode from Transmitter mode

2.After 32 clock cycle, send the Write_SN command by the pin of Data_in to write SN data to memory.

3. Checking response signal by the pin of Data_in.