AS3911 datasheet(44/149 Pages) AMSCO

44 / 149 page

AS3911 – 44

ams Datasheet, Confidential: 2013-Oct [2-03]

A p pl i c at io n I n f o r m at i o n

SPI Timing

Figure 30:

SPI Timing

Figure 31:

SPI General Timing

Symbol

Parameter

Min

Typ

Max

Unit

Notes

General Timing (VDD = VDD_IO = VDD_D = 3.3 V, Temperature 25°C)

TSCLK

SCLK period

100

TSCLK=TSCLKL+TSCLKH, use

of shorter SCLK period

may lead to incorrect

operation of FIFO

TSCLKL

SCLK low

TSCLKH

SCLK high

TSSH

SPI reset (/SS high)

100

TNCSL

/SS falling to SCLK rising

First SCLK pulse

TNCSH

SCLK falling to /SS rising

(tbd)

Last SCLK pulse

TDIS

Data in setup time

TDIH

Data in hold time

Read Timing (VDD = VDD_IO = VDD_D = 3.3 V, Temperature 25°C, CLOAD ≤50 pF)

TDOD

Data out delay

TDOHZ

Data out to high

impedance delay

...

DATAI

...

tSCLKH

tNCSL

tSCLKL

tDIS

tDIH

tNCSH

/SS

MOSI

MISO

SCLK

AS3911 Datasheet(PDF) 44 Page - ams AG

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