MASTER OF COMPUTER APPLICATIONS
Course Code : MCS-012
Course Title : Computer Organisation and Assembly Language Programming
Assignment Number : MCA (2)/012/Assign /2014-15
Maximum Marks : 100
Weightage : 25%
A 32 × 4 RAM means that RAM has 32 words,
5 address lines (25 = 32), and 4 bit data word size.
We can represent a RAM using 2A×D,
A-> Number of address lines
D -> Number of Data lines
The 32 × 4 RAM circuit where 5 × 32 bit decoder is used
The 4 bit data input come from input buffer
The 4-bit data output is stored in output buffer
A RAM has a capacity of 1024K having the word size of 64 bits and supports only word addresses.
(i) How many data input and output lines does this RAM need? Explain your answer.
Ans: Data input and Data output lines are equal and of word size, Hence Ram will need 64 Data lines
(ii) How many address lines will be needed for this RAM? Explain.
Ans: Convert 1024K to 2A format 1024K/64
We can represent a RAM using 2A × D = 214 × 64 RAM Hence Address lines are 14 Address lines.