What is 8255 Programmable Peripheral Interface (PPI
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. Basically it has three, 8-bit ports that are used
Intel 8255 - Wikipedia
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 for use with their 8085 and 8086 microprocessors and
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