Overview

The EM638165 SDRAM is a high-speed CMOS synchronous DRAM containing 64 Mbits. It is internally configured as 4 Banks of 1M word x 16 DRAM with a synchronous interface (all signals are registered on the positive edge of the clock signal, CLK). Read and write accesses to the SDRAM are burst oriented; accesses start at a selected location and continue for a programmed number of locations in a programmed sequence. Accesses begin with the registration of a Bank Activate command which is then followed by a Read or Write command.

特性 Features

? Fast access time from clock: 5/6/6/6/7 ns

? Fast clock rate: 166/143/133/125/100 MHz

? Fully synchronous operation

? Internal pipelined architecture

? 1M word x 16-bit x 4-bank

? Programmable Mode registers

-CAS# Latency: 2, or 3

-Burst Length: 1, 2, 4, 8, or full page

-Burst Type: interleaved or linear burst

-Burst stop function

? Auto Refresh and Self Refresh

? 4096 refresh cycles/64ms

? CKE power down mode

? Single +3.3V ± 0.3V power supply

? Interface: LVTTL

? 54-pin 400 mil plastic TSOP II package