AD9546SLASHPCBZ datasheet(196/205 Pages) AD

196 / 205 page

AD9546

Data Sheet

Rev. 0 | Page 196 of 205

INITIALIZATION SEQUENCE

The suggested initialization sequence for powering on and programming the AD9546 is shown in Figure 132 to Figure 134.

WRITE:

ISSUE A

CHIP LEVEL RESET

(PIN OR SOFT RESET)

RST_COUNT =

RST_COUNT + 1

REFERENCE INPUT(S)

CAN BE APPLIED

ANY TIME HEREAFTER

SUBPROCESS

SYSTEM CLOCK

INITIALIZATION

RST_COUNT > 0

RAISE FLAG FOR

DEBUGGING

WRITE

READ:

END

RST_COUNT = 0

YES

CHIP LEVEL

RESET LOOP

SUBPROCESS:

ANALOG PLLx

INITIALIZATION

x = 0

APLLx

ENABLED

x > 1

x = x +1

YES

SOFTWARE

GENERATED

AD9546

WRITE REGISTER

CONTENT FROM

SETUP FILE

YES

START

EEPROM

DOWNLOAD

YES

SET M3 HIGH

APPLY VDD

(ALL DOMAINS)

END

SPI OR I2C

SPI

SET M4 LOW

SET M4 HIGH

SELECT AD9546 I2C

ADDR USING CSB/M6, SDO/M5

APPLY VDD (ALL

DOMAINS)

YES

THIS LOOP SERVES AS AN INDICATOR

THAT THE POWER-ON RESET CIRCUITRY

HAS TRIGGERED AN INTERNAL RESET.

I2C

Figure 132. Programming Sequence Flowchart

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