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

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. 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.

It is an active-low signal, 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.

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

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. Retrieved 3 June Datashee mode is selected when D 7 bit of the Control Word Register is 1. 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. The two modes are selected on the basis of the value present at the D 7 bit of the control word register.

The ‘s outputs datssheet latched to hold the last data written to them. It was later cloned by other manufacturers. Retrieved 3 June Input and Output data are latched. 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.

Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:. Port A can be used for bidirectional handshake data transfer.

A Datasheet(PDF) – Intel Corporation

As an example, consider an input device connected to at port A. As an example, if it is needed that PC 5 be set, then in the control word. Acknowledgement and handshaking signals are provided to maintain proper data flow and synchronisation between the data datahseet and receiver.

From Wikipedia, the free encyclopedia. The Intel or i programmable peripheral interface PPI chip was developed and manufactured by Intel in dstasheet first half of the s for the Intel microprocessor and is a member dafasheet the MCS Family of chips.

Views Read Edit View history. 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. 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.

Microprocessor And Its Applications.

Intel 8255

It is an active-low signal, i. Acknowledgement and handshaking signals are provided to maintain proper data flow and synchronisation between the data transmitter and receiver.

The is also directly compatible with the Zas well as many Intel processors.

Only port A can be initialized in this mode. Some of the pins of darasheet C function as handshake lines. Intel Intel D This page was last edited on 23 Septemberat All of these chips were originally available in a pin DIL package. Each line of port C PC 7 – PC 0 can be set or reset by writing a suitable value to the control word register.

Programmable Peripheral Interface – Intel Chipset Datasheet

Only port A can be initialized in this mode. Input and Output data are latched. So, without latching, the outputs would become invalid as soon as the datashewt cycle finishes. Address lines A 1 and A 0 allow to access a data register for each port or a control register, as listed below:.

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 daatasheet modes, i.