P22 P22 RD 8051 micro controller A15 PSEN AB ADT ADO ALE Latch EEPROM 32K RAM 8K Keypad Encoder ADC 0804
An 8051 micro,controller must be connected to a latch, an EEPROM, a RAM memory, a keypad and
encoder and an ADC. Figure 2.1 shows the different components. For the arrangement to work the
components must be connected to the address bus, the data bus, the decoder and the microcontroller.
The RAM must be connected to address 0x0000 to 0x3FFF, the keypad and encoder to address 0x4000
and the ADC to address 0x6000. The program that must be executed is in the EEPROM. A crystal must
also be connected to the microcontroller. Complete the circuit diagram by connecting all the pins of the
controller and the devices to the correct pins/lines. The missing pin names and line numbers must also
be filled in on the controller and devices.
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