Inter-Integrated Circuit (I2C) Bus Video Lecture | Embedded Systems (Web) - Computer Science Engineering (CSE)

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hi in this video we will see eye to see
communication protocol first we will see
what is I to free eye to see can be
expanded as inter integrated circuit it
is one of the serial communication
protocol it is a bi-directional data
transfer protocol and it is a pape you
blacks hope you plus means the data can
be transfer from one medium to the other
medium with a single line the data
transfer can happen from 1 to 2 or 2 to
1 but the thing is at a single time only
one can transmit the data so others will
receive the data so that this kind of
communication is known as the hockey
pucks communication so i2 z has only one
data line that's why I to see also a
populist communication protocol I to see
is a synchronous communication protocol
this is synchronized with crop signal so
clock is provided to synchronize 2
devices in communication time clock is
controlled when data line is change
whenever the data needs to be changed
the clock is controlled
this is a simple prototype of a to see
communication here
I to see communication have n number of
masters and a number of slaves
this is a basic eye to see prototype
it has only one moisture and in number
of slaves the moisture can be a
microcontroller under it can be a LCD
display or EEPROM or any other
microcontroller so from master 2 lines
are taken out that is data line and
clock line is the if real
so this SDA and ACL is connected to the
N number of slaves like this as shown
here
so from Masha only one SDA line and only
one is real line is taken out so that
the number of wires gets reduced then we
compare it to SP a communication which
repairs increases the number of lines as
the slave increases this is one of the
advantage of A to Z protocol we will
move further speed of a to see
communication protocol can be splitted
to three types that is slow which is
under 100 kbps and a force 400 TBS and
high speed which is defined for MBBS
this 3.4 MBBS communication is available
only in I to see version 2.0 a 2 C is a
2 wire communication
it has SDE and HCL when voltage is high
it is considered as one when voltage is
low it is considered as zero here we can
see how there is e and ACL lines or
connected with a motion and two slaves
when fel is one data is a valid leader
when you see L is 0 which means data
changes a basic eye to see protocol is a
monster shape for a protocol that is a
finger moisture and single shape monster
controls the clock always sleep device
may hold the clock low to prevent data
transfer no data transfer is present
when clock is low sleep device pull the
clock room then the data structure
should not occur so this is the one way
of preventing data transfer by the slave
it is a kind of wired and connection
which means and the connection wired and
connection it is a wired and connection
we will see why I am Telling this is a
wire and connection later by default I
to see lines or open rain or open
collector so adding pull-up is necessary
so that it will have only two states
that is floating high and Dre low
default the to lock state is high that
means by default I to see lines will
have high straight so whenever the
device needs to be pulled oh it will go
to low that time later cancer may happen
that is the need for adding them pull-up
resistors this is the packet format of a
to see protocol I to see protocol has
started and a address which is seven to
ten days and rewrite that is mustard to
read from sling or moisture writes to
the same which kind of communication
needs to be happen that is specified in
this vehicle after that ACK the receiver
sends the ACK so that is the accolade
and 8-bit data master or from slave
that that is Cle Seder from this end and
again as another another data under way
AK and it goes on as long as the strong
beat received this is the simple
explanation of A to Z packet you will
see all these this is this start
condition of I to see protocol here s da
is high and it changes to low here fel
is high so the start condition is if we
changes from high to low
here is the exchanging high to low when
ACLS hi this is the short condition of I
to see the stop condition of A to C is
shown here here the data line changes
from high to low here the data length
changes from high to low then the ACL is
high this is the stop condition of I to
see communication repeated stored in
this case repeated short condition short
condition is generated instead of stop
brain data transfer it is a byte
oriented data transfer so 8 bit of data
is transmitted
ACK is transmitted by the spin of the
data it is
it must be first and LSB next I know
that data transfer it may vary based on
that slave
for that we need to understand the
slaves datasheet in all kind of
communication first by from the master
is always address that first bite is
transmitted by master and address
displayed is the recipient next to bite
that is next to fight is based on the
last bit of our W that is feed or write
in the first I can't seven bit will be
the address and one bit will be the read
or write so then read write bit is zero
moisture will be the writer and when
reread bit is one answer will be the
receiver and the nine pulses
acknowledgement big so acknowledgment
bit will look like this acknowledgement
means data online to low here we can see
this is the act and this is not
acknowledgment or narrative of Harshman
so the ESD plane is cooled by the slave
to low to give the acknowledgement to
the moisture and that time moisture
gives the pulse
mustard gives the pulse with respect to
the subhead speed so that it generates
the clock that time sv need to be pulled
low by the slip to give the
acknowledgement we will see there will I
to see data transfer in this image here
we can see the start condition and the
data lines and ACK and stop so SB i SEL
hi this is the idle time and EST a high
to low when a CL high that is the start
condition when is really side this big
deducted well FCS low data is allowed to
allowed to change from 0 to 1 or 1 to 0
this advocate is sent by the receiver by
pulling it low in the clock is high and
this is the strong bit that is 50 don't
know height and fel is high that is the
stop condition here the full image of I
to see data transfer is given first the
clock is short generating and the master
gives the slave address and that
particular slave will listen and short
listening to the motion and it becomes
the receiver here
the address is seven bit and the next
bit is weed all right
and then at is even by the slave by
pulling data and know then that clock
pulses generated so based on this read
or write the data transfer is happened
by sending or receiving data and again
the AK is given and it continues and the
next hitter transfer happens under they
act and the next data transfer at
basically and it goes on as long as the
stop condition is received this is how
the data transfer happens from a single
muscle to multiple stage I to see it's a
multi most communications so but
arbitration is record then two devices
price to drive is ta two different
values it is necessary to be sure that
is not interfering with another message
if the base is trying to send a logic
and but here's the logic zero that is
trying to send a logic one
but here zero it immediately stops
transmission and gives the other Center
PRP synchronization is nearing o'clock
in case of a 2 C multi motion that is
arbitration we will look at to the
advantages and disadvantages of a to see
communication the advantage of a to see
communication is it is good for on both
devices
that is when the data transfer needs to
be happened from one device to other and
which requires less distance so in that
conditions this kind of vital
communication is more important and easy
to implement if we do link multiple
devices because of addressing scheme
cause and complexity
do not scale up because some work that
is number of devices under different
voltage of I to see communication
protocol is the complexity of supporting
software components can be higher than
that of the scheme that is SPE which
does not have a dress this is one of the
disadvantages of A to Z communication
when we try to implement the i2c we may
face many problems so they don't have
any other communication options here
like can so that's like many of the old
communication have I to see nowadays the
can is introduced and which prevents
some of the different disadvantages so
this is PA and i2c this is the end of I
to see communication protocol post your
doubts in the comments and don't forget
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