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RFDA0025

DS120817

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

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

Serial Port Interface:

SPI Timing Diagram

Programming Example - 6-Bit

SPI Timing Diagram Specifications

Parameter

Limit

Unit

Comment

t1

25

MHz max

CLK Frequency

t2

20

ns min

CLK High

t3

20

ns min

CLK Low

t4

5

ns min

DATA to CLK Setup Time

t5

5

ns min

DATA to CLK Hold Time

t6

30

ns min

DATA Valid

t7

5

ns min

LE to CLK Setup Time

t8

5

ns min

CLK to LE Setup Time

t9

10

ns min

LE Pulse Width

t10

20

ns max

Output Set

Control Voltage Table

Power-up Programming Truth Table

State

VDD=+5V

PUP

Attenuator Setting

Low

0V to 0.8V

0V to 0.8V

Low

Attenuation at Max, 31.5dB

High

High

Attenuation at Min, 0dB

CLK

DATA

t6

LE

t1

t2

t3

t4

t5

t7

t8

DOUT

t9

t10

MSB

LSB

D4

D3

D2

D0

D1

D5

CLK

DATA

LE