8282 Unit is an Octal (8 bit) latch the used to work with 8086/8088 CPUs, the reason it need was because in
thouse CPUs familys the Address and Data used same pins, and the latch was needed to staibilize the address on the address bus while CPU will write data on it.
Originally that used due to Technologic limmitations in the late 70s
in 8086 we need 3 8282 Units to store the whole address (0H - 0FFFFFH) range.
● Data in - Connected to AD0-15 Pins (AD0-7)
● Data Out Pins - Connected to the address BUS -
● STB Pin - connected to ALE pin from CPU, it will store the new data from Din Pins in the latch
● OE Pin - Enable the 8282
● VCC - Vin 5V , GND - 0V
Waveform of 8282 Behaive
Example of 8282 VHDL Code
VHDL Code of Test Bench for 8282
