Infineon TLI4970 Quick Instruction Manual

How to

Ho

w

–

Q

Scope

:

The fol

l

sensors

Interf

a

The co

m

during

t

Physi

c

Serial

I

This ch

a

(SICI).
this, th

e

The tra

n

a bit. T

h

interfac
large b

o

Com

m

A micr

o

(startin

g

•

The ini

t

T". An

e

Program T

to

P

uick

owing inst

r

can be pro

g

ce:

municatio

he progra

m

al Layer

nspectio

n

pter gives

This interf

a

OCD pin

i

smission i

s

ese bits fo

r

e bit-synch

r

undaries).

unication

controller

n

with MS

B

Send a sin

g

o 0 is
o 1 is

ial pulse le

n

xample of

LI4970 –

Q

rog

r

Instr

u

uctions de

s

rammed.

n with the

s

ming com

m

and Con

an overvie

w

ce is avail

a

s used.

based on

t

m a 16bit

c

onous (an

d

Timing

eeds to pe

r

).

le low/hig

h

sent as a s

h

sent as a l

o

gth (T1/T

2

a 1 bit tra

n

uick Instru

am

T

ctio

n

cribe the s

e

ensor is pe

r

ands a vo

l

figuratio

n

about the

ble and fu

n

ransmittin

g

ommand

w

thus robu

s

form the f

o

PWM tra

n

ort low an

d

ng low an

d

) and the

o

smission c

a

ction Guid

e

LI49

Gu

i

quence of

c

formed by

tage of 20.

5

Interfac

e

Serial Ins

p

ctional in

p

a single b

i

ord, simil

a

t) and very

llowing st

e

smission,

w

long high

short high

verall peri

o

n be seen i

n

V1.1

70

de

ommands

the one wi

r

V has to b

(SICI)

ection and

C

arallel wit

h

t to the sen

s

r to the SP

I

flexible in

ps 16 time

s

ith at least

PWM puls

e

PWM puls

e

d T deter

m

below:

how the T

L

e SICI int

e

provided

a

onfigurati

the SPI in

t

or and im

m

interface.

T

timing (wi

t

to send/re

c

30/70 (or

7

(e.g. 2us

l

(e.g. 6us

l

ines the re

a

I4970 curr

rface. In A

d

at the CS p

i

on Interfac

erface mo

d

ediately r

e

his makes

hin some q

ceive 16 bi

t

0/30) duty

ow, 6us hi

g

ow, 2us hi

g

-out time

Page 1

nt

dition,

n.

e. For

ceiving
the

ite

s

cycle:

h)
h)

"Delta-

How to

•

s• I

t• I

By che

c

PWM t

r

a 0 or 1

The fig

u

oscillos

•

T

~

OCD Si

Å

Program T

Send a sho

r

end a bit)

f the sens

o

ransmitted
f the sens

o

king the o

u

ansmissio

n

is transmit

t

re below s

cope:

ypical bit

0.4 μs (gi

v

gnal [V]

MSB …



‚sen

LI4970 –

Q

t low puls

e

r transmits

PWM (see

r transmits

tput after t

h

of a bit "

D

ed by the

s

hows a tra

n

transmissi

o

es ~285 k

B

...

0' from

sor Æ µC

uick Instru

(marks th

e

a 1, it pull

s

figure abo

v

a 0, it does

e read-out

elta-T", fo

r

ensor. See

b

smission t

h

n speed (P

W

it/s).

one

b

16 bit are requi



‚1' from

µCÆ sens or



ction Guid

e

end of the

the output

e: 6us-2us

not pull th

e

time (dete

r

this case

4

elow a 1

b

rough the

O

M) is: ~0

it frame

red, starting with M

S



‚1' from

sens or Æ µC

V1.1

transmitte

d

low for th

e

= 4 us)

output lo

w

mined by t

h

us), the m

i

it response

CD pin as

.4 μs / ~1.

6

…

B

…



‚0' from

µC Æ sen

s

PWM and

time diffe

r

e time giv

e

crocontroll

e

example fr

o

could be s

e

μs, check

a

…...

or

syncs the

s

ence given

n by the p

r

er can dete

r

om the TL

I

en using a

n

fter ~1.1μ

s

…

Page 2

ensor to

by the

evious
mine if

4970:

, wait

LSB Æ