INTEL 8255 DATASHEET PDF

DATASHEET. The Intersil 82C55A is a high performance CMOS version of the industry standard A and is manufactured using a. The Intel (or i) Programmable Peripheral Interface (PPI) chip was developed and .. , Complete Description about the Intel IC; , Datasheet; , functions overview; The Intel (or i) Programmable Peripheral Interface (PPI) chip .. “PCI A Datasheet” (). 6.

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The Intel or i programmable peripheral interface PPI chip was developed and manufactured by Intel in the first half of the s for the Intel microprocessor datashret is a member of the MCS Family of chips.

Intel – Wikipedia

The i was also used with the Intel and Intel [1] and their descendants and found wide applicability in digital processing systems. It was later cloned by other manufacturers. The is also directly compatible with the Zas well as many Intel processors.

Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:. The control signal chip select CS pin 6 is used to enable the chip. It is an active-low signal, i. As an example, consider an input device connected to at port A. If from the previous operation, dataeheet A is initialized as an output port and if is dtaasheet reset before using the current configuration, then there is a possibility of damage of intsl the input device connected or or both, since both and the device connected will be sending out data.

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The two modes are selected on the basis of the value present at the D 7 bit of the control word register.

A Datasheet pdf – PROGRAMMABLE PERIPHERAL INTERFACE – Intel

As an example, if it is needed that PC 5 be set, then in the control word. This mode is selected when D 7 bit of the Control Word Datasheett is 1. For example, if port B and upper port C have to be initialized as input ports and lower port C and port A as output ports all in mode The two halves of port C can be either used together as an additional 8-bit port, or they can be used as individual 4-bit ports.

Since the two halves of port C are independent, they may be used such that one-half is initialized as an input port while the other half is initialized as an output port.

When we wish to use port A or port B for handshake strobed input or output operation, datashheet initialise that port in mode 1 port A and port B can be initilalised to operate in different modes, i. Some of the pins of port C function as handshake lines.

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Intel 8255

For port B in this mode irrespective of whether is acting as an input port or output portPC0, PC1 and PC2 pins function as handshake lines.

Only port A can be initialized in this mode.

Port A can be used for bidirectional handshake data transfer. This means that data can be input or output on the same eight lines PA0 – PA7.

inte, In this mode, the may be used to extend the system bus to a slave microprocessor or to transfer data bytes to and from a floppy disk controller. Acknowledgement and handshaking signals are provided to maintain proper data flow and synchronisation between the data transmitter and receiver.

Intel Intel D Interrupt logic is supported. Input and Output data are latched. Microprocessor And Its Applications. Retrieved 3 June