Sample Midterm Test Solutions Fall 2000

PwnHero ELE 758 * DIGITAL SYSTEMS ENGINEERING * MIDTERM TEST * Student name: Date: Example 1 Section: Memory hierarchy (SRAM, DRAM) Question # 1.1 Circle the memory type based on electrically re-chargeable elements a) CPU-registers; b) Cache memory; c) Main memory (DRAM); d) Secondary memory devices (Disk). Correct answer: c). Comments: DRAM cell is based on capacitor, which is electrically re-chargeable element Question # 1.2 For 16 M x 32 bit SDRAM (64 Mbyte SIMM). a) Calculate number of SIMM pins used for address Number of address pins = ___________ Correct answer: Number of address pins = _12_ 24 Comments: Number of DRAM cells = 16 M = 2 . Assuming that DRAM is square matrix 12 number of columns = number of rows = 2 . Thus, number of Row address lines = 12 Column address lines = Log 2 = 12 PwnHero.com