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Fast, asynchronous sram, Chapter 2: fast, asynchronous sram, Chapter 2, “fast, asynchronous sram – Digilent 410-044-10P-KIT User Manual

Page 11: Chapter 2

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Spartan-3 Starter Kit Board User Guide

www.xilinx.com

11

UG130 (v1.1) May 13, 2005

1-800-255-7778

R

Chapter 2

Fast, Asynchronous SRAM

The Spartan-3 Starter Kit board has a megabyte of fast asynchronous SRAM, surface-
mounted to the backside of the board. The memory array includes two 256Kx16 ISSI

IS61LV25616AL-10T

10 ns SRAM devices, as shown in

Figure 2-1

. A detailed schematic

appears in

Figure A-8

.

Figure 2-1:

FPGA to SRAM Connections

Spartan-3

FPGA

ISSI

256Kx16 SRAM

(10 ns)

I/O[15:0]

A[17:0]

CE

UB

LB

WE

OE

ISSI

256Kx16 SRAM

(10 ns)

I/O[15:0]

A[17:0]

CE

UB

LB

WE

OE

IC10

IC11

(K4)

(G3)

(P5)

(R4)

(N5)

(P7)

(T4)

(P6)

OE

WE

(see Table 2-1)

LB2

UB2

CE2

LB1

UB1

CE1

(see Table 2-3)

(see Table 2-4)

(xx) = FPGA pin number

UG130_c2_01_042604

(see

Table 2-4

)

(see

Table 2-1

)

(see

Table 2-3

)