8255 operation modes | Mode 0, 1 & 2 | Part - 1/2 | MPMC | Lec-41 | Bhanu Priya

Microprocessor & MicroController (MPMC)
operation modes of 8255 : mode 0, 1 & 2 part-1

#8255 #microprocessorvsmicrocontroller #microprocessors #microprocessor8085 #microprocessor #educationalvideo #engineering #electricalengineering #microcontrollers #microcontroller #8085microprocessor
Class Notes ( pdf )

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[satyaranjanpadhiary]

What are handshake signals, it will better if you try to explain the things rather than reading the lines you have written, because in books it is already present. Thank you.

[buzzfeedRED]

@Education 4u : in mode 0, Ports have interrupt capability

[anushasanpoudel]

'Latched' means the bits are put into a storage register (array of flip-flops) which holds its output constant even if the inputs change after being latched.

The 8255's outputs are latched to hold the last data written to them. This is required because the data only stays on the bus for one cycle, so without latching the outputs would become invalid as soon as the write cycle finished.

The inputs are not latched because the CPU only has to read their current values, then store the data in a CPU register or memory if it needs to be referenced at a later time. If an input changes while the port is being read then the result may be indeterminate.

[gateramganesh]

Explain the meanings also.. You where just reading what ever was the madam

[eqfira]

It was good dear mam it was great i think it is not easy to create video for student taking time from them nice

[shaikjakeerhussain]

Just ur reading ur notes, I think it seems to be ur doing revision for exms😂

[rashisinghvi]

You just make bulletins of notes and discuss this, you are not explain the topic only you just read the content

[physnoct]

It would be interesting to have an example of working code using the 8255 port a in mode 2.

[Allinone-bmwv]

Madam outputs are latched and inputs are not latched means meaning

[galfrasian]

I guess these are the features of mode 0, mode 1, mode 2.

[himanshu]

Could u plz explain the points??..Coz this is the main reason for watching videos!So please.

[thisissharief]

i like ure colurfull pens.... can u give me one

[zulqarnainkhan]

mode 0-it has interrupt handling capability

[intmohit]

Mam notes ko sirf bolne s koi nahi samjhta
Notes m likha kya h wo to hum bhi paadh sakte h, atleast kuch to explain karti aap .
Handshake word bola par uska matlab kya h ??
Sirf likha hua padhne s kuch nahi hota

[shlokasmadeeasy]

What do you mean by latched and unlatched? Please respond.

[sureshch]

Akka missing clarity pls do videos with better explanation...tq

[gowthamnaveen]

could you tell me which book you are using???

[farukeomar]

If user put 8B h in control register, what happen?

[vikasp]

Ditto from tutorials point....explain cheyandi madam chadavadam aa kadu....bane undi konthavaraku

[akbarshaik]

Initial establishment of a singnal between two devices is called handshaking