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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.
EPCS4 Maximum Ratings
Symbol
Parameter
Condition
Min
Max
Unit
VCC
Supply voltage
With respect to ground
−0.6
4.0
V
VIDC
input voltageWith
respect to ground
−0.6
4.0
V
IMAX
DC VCC or GND current
15
mA
IOUT
DC output current per pin
−25
25
mA
PD
Power dissipation
54
mW
TSTG
Storage temperature
No bias
−65
150
°C
TAMB
Ambient temperature
Under bias
−65
135
°C
TJ
Junction temperature
Under bias
135
°C
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)