RF6001 datasheet(33/70 Pages) RFMD

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RF6001

Rev A3 DS050929

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

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

Part of the POLARIS™ TOTAL RADIO™ Solution

Case 2: GMSK Clocking Signals Generated by RF6001, TXD_MODE=0, TXF=00

Transmission is initiated by setting the TXST or TXEN pins to a logical high. The RF6001 will then respond by outputting a

13/48MHz clock on MCK and a pulse on MS on every 16th MCK period. The baseband IC will respond with an NRZ data bit on

MDI at every rising edge of MCK if SDI bit TXCKINV is low. The RF6001 will read this data on every falling edge of MCK if TXCK-

INV is set low. If TXCKINV is set high, the baseband will assert an NRZ data bit on the falling edge of MCK and the RF6001 will

read this data bit on every rising edge of MCK. MS serves to synchronize the baseband IC by providing a new word pulse to

refresh the output register of the baseband IC. The diagram below summarizes the operation of this interface.

5161

MCK

MDI

TXST/TXEN

Tsu

Tcwh

Tcwl

Tcs

TXCKINV=0

5161

MCK

MDI

TXST/TXEN

Tsu

Tcwh

Tcwl

Tcs

TXCKINV=1

RF6001 Datasheet(PDF) 33 Page - RF Micro Devices