10+ 8255 block diagram
2 Pin Diagram of 8255. The signal description of 8255 are briefly presented as follows.
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Data busD 0 -D 7.
. There are two different modes of 8255. These are 8 -bit bi-directional buses connected to 8085 data bus for transferring data. Bit Set Reset BSR Mode.
The 8085 activates the WR input of 8255 when it wants to write data to a port of 8255. It is connected to WR output of 8085. The block diagram of 8255 is like this.
These are eight port A lines that acts as either latched output or buffered input lines. Programmable Peripheral Interface Block Diagram. Describe the Block diagram of 8255.
Bit Set Reset BSR Mode. It is an active low input pin for 8255.
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8255 Programming
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8255 Programming
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8255 Programming
8255 Programming
8255 Programming
8255 Programming
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