$1007$ICT Assignment

Trimester $1,2024$

$3$ V$1\mathrm{.}2$

Table $1$: Input and output values for Part A$.$

M

Value

INPUT OUTPUT

M$1$ M$2$ M$3$ M$4$ January Even

month

Odd

month

December Error

$0000010000$

$1000100100$

$2001001000$

$3001100100$

$4010001000$

$5010100100$

$6011001000$

$7011100100$

$8100001000$

$9100100100$

$10101001000$

$11101100010$

$12110000001$

$13110100001$

$14111000001$

$15111100001$

For Part A$,$ each of the five $(5)$ outputs will be displayed with a single output pin

$($green circle in Logisim$)$ resulting in $5$ outputs for your Part A circuit:

Part B:

With the Part A circuits in place, the company wants to both keep track of stock

levels and manage any changes to stock across the months.

Stock is managed via pallets of toys in the warehouse, and this varies from no

stock $(0)$ to a full warehouse of $15$ pallets. You will need to present the stock

level on these $(0-15)$ pallets with $4-$bit memory.

When new stock arrives, or is sold, the stock levels$/$memory needs to be

updated with any stock changes. These changes across the months are

represented by a stock calculator that needs to be coded into the logic of the

digital solution to be produced. There is a different stock calculator for

undergraduate $(1007$ICT$)$ and postgraduate $(7611$ICT$)$ students. Please make

sure you use the correct calculator in your circuit.

$1007$ICT Assignment

Trimester $1,2024$

$4$ V$1\mathrm{.}2$

Undergraduate $(1007$ICT$)$ Stock Calculator

INPUTS OUTPUTS Note

January Even

Month

Odd

Month

December Month

Error

$+/-$ X$1$ X$0$

$10000010+2$

$01000001+1$

$00100010+2$

$000100000$

$00001$ Error signal

For this part, you will need to implement the $4-$bit memory of warehouse stock

and add any stock to the warehouse as directed by the stock calculator. The

OUTPUTS Columns identifies for each row $($January$/$even month$/$odd

month$/$December$,$ and error category$)$ the value to add to the stock using an

adder unit that you have built. The note shows the decimal value of the addition

or subtraction.

This is driven by the output from Part A$,$ i$.$e$.$ indicating what month is currently

being processed. The Error output should light an error LED in Part B$.$

Examples $($based on the above table$)$:

Month $=0($January special case$),$ stock value is increased by $2.$

Month $=5($June $=$ odd month$),$ stock value is increased by $2$

Month $=8($September $=$ even month$),$ stock value is increased by $1$

Month $=11($December special case$),$ stock value does not change

Month $=14($Error state$),$ Error signal is generated, stock value does not change

Note this is only a sample of the possible months to aid in understanding the

stock calculation table above. Your circuit will need to cover all months and

error combinations.