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RF2722

QUADRATURE DEMODULATOR

RF Micro Devices 

RF2722

Proposed

At power up the SDI address 011111 should be written to set up the default reset states of all registers. Note that programmed

settings will be lost if power to the part is removed.

The figure below shows a timing diagram for the serial interface. The slave select (SS) pin is normally high. A serial transfer is

initiated by taking SS low. The address and data bits on the serial data in (SDI) pin are shifted in on rising edges of the serial

clock (SCLK) pin. Twelve data bits follow the four address bits. The data is latched and changes take effect on the rising edge

of SS. Refer to the Electrical Specifications for the timing requirements.

Tcs

Tcwh

Tcwl

Tcs

...

...

MSB

...

LSB

Tsu

Th

Tcs

20 of 26

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

Rev A4 DS050919

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