8255A DATASHEET PDF

The Intel (or i) programmable peripheral interface (PPI) chip was developed and manufactured by Intel in the .. “Intel 82c55 PPI Datasheet” (PDF) . Title, System Components. Description, Programmable Peripheal Interface. Company, Intel Corporation. Datasheet, Download A datasheet. Quote. A datasheet, A circuit, A data sheet: AMD – Programmable Peripheral Interface iAPX86 Family,alldatasheet, datasheet, Datasheet search site for.

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Some of the pins of port C function as handshake lines. This mode is selected when D 7 bit of the Control Word Register is 1. Interrupt logic is supported. 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.

Input and Output data are latched. This page was last edited on 23 Septemberat 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.

For port B in this mode irrespective of whether is acting as an input port or output portPC0, PC1 datasehet PC2 pins function as handshake lines. This means that data can be input or output on the same eight lines PA0 – PA7.

The is a member of the MCS Family of chips, designed datashfet Intel for use with their and microprocessors and their descendants [1]. 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 and is a member of the MCS Family of chips.

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In this mode, the may be used to extend the system bus to a slave microprocessor or daatasheet transfer data bytes to and from a floppy disk controller.

Port A can be used for bidirectional handshake data transfer. Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:. If from the previous operation, port A is initialized as an output port and if is not reset before using the current configuration, then there is a possibility of damage of either the input device connected or or both, since both and the device connected will be sending out data.

This means that data can be input or output on the same eight lines PA0 – PA7. If an input changes while the port is being read then the result may be indeterminate. Acknowledgement and handshaking signals are provided to maintain proper data flow and synchronisation between the data transmitter and receiver.

Intel 8255

Each line of port C PC 7 – PC 0 can be set or reset by writing a suitable value to the control word register. 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.

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 satasheet as individual 4-bit ports. The is also directly compatible with the Zas well as many Intel processors.

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Input and Output data are latched. All of these chips were originally available in a pin DIL package. Interrupt logic is supported. Only port A can be initialized in this mode. The two modes are selected on the basis of the value present at the D 7 bit of the control word register.

Retrieved 3 June Intel Intel D 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.

So, without latching, the outputs would become invalid as soon as the write cycle finishes. By using this site, you agree to the Terms of Use and Privacy Policy.

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. It is an active-low signal, i. Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:.

A Datasheet pdf – PROGRAMMABLE PERIPHERAL INTERFACE – Intel

This mode is selected when D 7 bit of the Control Word Register is 1. It was later cloned by other manufacturers. The Intel or i Programmable Peripheral Datssheet PPI chip was developed and manufactured by Intel in the first half of the s for the Intel microprocessor.