串行FLASH配置芯片(EPCS1或EPCS4)数据手册

March 2003, ver. 1.1 Data Sheet

Serial Configuration

Devices

(EPCS1 & EPCS4)Features ■ 1- and 4-Mbit flash memory devices that serially configure CycloneTM

FPGAs■ Easy-to-use four-pin interface■ Low cost, low pin count and non-volatile memory■ Low current during configuration and near-zero standby mode

current ■ 3.3-V operation■ Available in 8-pin small outline integrated circuit (SOIC) package ■ Enables the Nios? processor to access unused flash memory through

active serial (AS) memory interface■ Re-programmable memory with more than 100,000 erase/program

cycles■ Programming support with ByteBlasterTM II download cable■ Additional programming support with the Altera? Programming

Unit (APU) and programming hardware from BP Microsystems,

System General, and other vendors ■ Software design support with the Altera Quartus? II development

system for Windows-based PCs as well as Sun SPARC station and

HP 9000 Series 700/800■ Delivered with the memory array erased (all the bits set to 1)

Figure 1 shows the Altera serial configuration device 8-pin SOIC package

and its pin-out diagram.

Figure 1. Altera Serial Configuration Device Package Pin-Out Diagram

1 Whenever the term “serial configuration device(s)” is used in

this document, it refers to Altera EPCS1 and EPCS4 devices.

V

CC

V

CC

DCLK

ASDI

V

CC

GND

nCS

DATA

EPCS1 or

EPCS4 Device

1

2

3

4

8

7

6

5Altera Corporation 1

DS-CYCONFIG-1.1

Serial Configuration Devices (EPCS1 & EPCS4) Data SheetFunctional

Description

With SRAM-based devices such as Cyclone FPGAs, configuration data

must be reloaded each time the system initializes, or when a new

configuration is needed. Serial configuration devices are flash memory

devices with a serial interface that can store configuration data for a

Cyclone device and reload the data to the device upon power-up or

reconfiguration. Table 1 lists the serial configuration devices.

Table 2 lists the serial configuration device used with each Cyclone FPGA

and the configuration fil