HMC7043LP7FE datasheet(22/44 Pages) AD

22 / 44 page

Data Sheet

HMC7043

Rev. B | Page 21 of 43

CLEAR

RESET

RF_SYNC

SYNC

REQUEST

PULSE

GENERATOR

REQUEST

WAIT

STARTUP

PULSE

GENERATOR

TIMEOUT?

SYNC

SETUP

PULSE

GENERATOR

SETUP

NOTIFY CHANNEL FSM

WHAT TYPE OF EVENT

IS COMING

DONE

POWER DIVIDERS/SYNC BLOCKS,

PAUSE BLOCKS, RESET LATCHES

REMOVE LATCH RESET,

PREPARE TO START CLOCKS

START CLOCKS,

WITH CLEAN TIMING,

SMALL PIPELINE DELAY

WAIT UNTIL THE NUMBER OF

PULSE GENERATOR CYCLES

EXPIRES

REMOVE POWER

Figure 26. Synchronization FSM Flowchart

FSM STATE

STARTUP

DIVIDER CHANNEL

FIXED NUMBER OF CLOCK INPUT CYCLES

FROM STATE CHANGE TO STARTUP, AND

ANY INTENTIONAL DIGITAL/ANALOG OFFSET

IF MUTE SIGNAL ARRIVES QUICKLY

RELATIVE TO SIGNAL TRAIN,

NO RUNT PULSE

PULSE GENERATOR = 2

DONE

FSM STATE

STARTUP

DIVIDER CHANNEL

IF CONTROL IS TOO LATE

RELATIVE TO SIGNAL TRAIN,

THERE IS A RUNT PULSE

PULSE GENERATOR = 2

DONE

Figure 27. Start-Up Behavior of an Example Divider Configured as a Pulse Generator

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