What Is 8255 Programmable Peripheral Interface Ppi Definition 2) mode 1: i o with handshake or strobed i o. in this mode, the port a and port c act as the input output ports but the port c is used for handshaking. hence, the data in this mode can flow only through port a and port b. this mode is also capable of handling the interrupts. in this mode, both the sender and the receiver gets the time to time. Programmable peripheral interface 8255.
The I O Mode Of 8255 Ppi Programmable Peripheral Interface Important features of the 8255 are listed below: 8255 is a programmable peripheral interface, available in the form of a 40 pin ic which works on a power supply of 5 v dc. it is compatible with a wide range of microprocessors and microcontrollers, making it widely popular. it has three 8 bit i o: ports a, b, and c. 8255a programmable peripheral interface. The intel 8255 (or i8255) programmable peripheral interface (ppi) chip was developed and manufactured by intel in the first half of the 1970s for the intel 8080 microprocessor. the 8255 provides 24 parallel input output lines with a variety of programmable operating modes. the 8255 is a member of the mcs 85 family of chips, designed by intel. 8255 is a programmable i o device that acts as interface between peripheral devices and the microprocessor for parallel data transfer. 8255 ppi (programmable peripheral interface) is programmed in a way so as to have transfer of data in different conditions according to the need of the system. in 8255, 24 pins are assigned to the i o ports.
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