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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As an example, if it is needed that PC 5 be set, then in the control word. Some of the pins datashert port C function as handshake lines. The control signal chip select CS pin 6 is used to enable the chip. Retrieved from ” https: The two modes are selected on the basis of the value present at the D 7 bit of the control word register. This mode is selected when D 7 bit of the Control Word Register is 1.

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The functionality of the is now mostly embedded in larger VLSI processing chips as a sub-function. 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.

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. Input and Inhel data are latched.

This is required because the data only stays on the bus for one cycle. Acknowledgement and handshaking signals are provided to maintain proper data flow and synchronisation between the data transmitter and receiver. As an example, consider an input device connected to at port A.

Programmable Peripheral Interface – Intel Chipset Datasheet

Interrupt logic is supported. When we wish to use port A or port B for handshake strobed input or output operation, we initialise that port in mode 1 port A and port B can be initilalised to operate in different modes, i. 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. Intel Intel D Microprocessor And Its Applications.

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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.

A Datasheet pdf – PROGRAMMABLE PERIPHERAL INTERFACE – Intel

Only datzsheet A can be initialized in this mode. Microprocessor And Its Applications. 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 intl port B for handshake strobed input or output operation, we initialise that port in mode 1 port A and port B can be initilalised to operate in different modes, i. The i was also used with the Intel and Intel [1] and their descendants and found wide applicability in digital processing systems.

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 Dayasheet – PA7. Since the two halves of port C are independent, they may be used such that one-half is initialized as an input datawheet while the other half is initialized as an output port.

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It is an active-low signal, i. This mode is selected when D 7 bit of the Control Word Register is 1. The is a member of the MCS Family of chips, designed by Intel for use with their and microprocessors and their descendants [1].

Interrupt logic is supported. For port B in this mode irrespective of whether is acting as an eatasheet port datasheeg output portPC0, PC1 and PC2 pins function as handshake lines.

This page was last edited on 23 Septemberat Retrieved 26 July Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:. Retrieved 3 June For example, if port B and upper port C have to be initialized as input ports and dataxheet port C and port A as output ports all in mode Address lines A 1 and A 0 allow to access a data register for datazheet port or a control register, as listed below:.

Intel 8255

By using intrl site, you agree to the Terms of Use and Privacy Policy. Inte and handshaking signals are provided to maintain proper data flow and synchronisation between the data transmitter and receiver. Retrieved 3 June 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.

Port A can be used for bidirectional handshake data transfer. The is also directly compatible with the Zas well as many Intel processors.

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