SCA3000-D01 datasheet(30/43 Pages) VTI

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SCA3000 Series

VTI Technologies Oy

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www.vti.fi

Doc.Nr. 8257300A.07

Rev.A.07

5.3.3

SPI AC characteristics

The AC characteristics of the SCA3000 SPI interface are defined in Figure 11 and in Table 17.

CSB

SCK

MOSI

MISO

TLS1

TCH

THOL

TSET

TVAL1

TVAL2

TLZ

TLS2

TLH

MSB in

MSB out

LSB in

LSB out

DATA out

DATA in

TCL

Figure 11. Timing diagram for SPI communication.

Table 17. AC characteristics of SPI communication.

Parameter

Conditions

Symbol

Min

Typ

Max

Unit

Terminal CSB, SCK

Time from CSB (10%)

to SCK (90%)1

TLS1

Tper/2

Time from SCK (10%)

to CSB (90%)1

TLS2

Tper/2

Terminal SCK

SCK low time

Load

capacitance at

MISO < 35 pF

TCL

0.80*

Tper/2

SCK high time

Load

capacitance at

MISO < 35 pF

TCH

0.80*

Tper/2

SCK Frequency

fsck =

1/Tper

Product

specific

MHz

Terminal MOSI, SCK

Time from changing

MOSI (10%, 90%) to

SCK (90%)1. Data

setup time

TSET

Tper/4

Time from SCK (90%)

to changing MOSI

(10%, 90%)1. Data

hold time

THOL

Tper/4

Terminal MISO, CSB

Time from CSB (10%)

to stable MISO (10%,

90%)

Load

capacitance at

MISO < 35 pF

TVAL1

Tper/4

Time from CSB (90%)

to high impedance

state of MISO1.

Load

capacitance at

MISO < 35 pF

TLZ

Tper/4

Terminal MISO, SCK

Time from SCK (10%)

to stable MISO (10%,

90%)1.

Load

capacitance at

MISO < 35 pF

TVAL2

1.3· Tper/4

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