[Altera]

Functional Description
To configure a system using an SRAM-based device, each time you power on the device, you must load the configuration data. The EPCS device is a flash memory device that can store configuration data that you use for FPGA configuration purpose after power on. You can use the EPCS device on all FPGA that support AS x1 configuration scheme.

FEATUREs
EPCS devices offer the following features:
■ Supports active serial (AS) x1 configuration scheme
■ 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
■ 2.7-V to 3.6-V operation
■ EPCS1, EPCS4, and EPCS16 devices available in 8-pin small-outline integrated circuit (SOIC) package
■ EPCS64 and EPCS128 devices available in 16-pin SOIC package
■ Enables the Nios® processor to access unused flash memory through AS memory interface
■ Reprogrammable memory with more than 100,000 erase or program cycles
■ Write protection support for memory sectors using status register bits
■ In-system programming (ISP) support with SRunner software driver
■ ISP support with USB-Blaster, EthernetBlaster, or ByteBlaster II download cables
■ Additional programming support with the APU and programming hardware from BP Microsystems, System General, and other vendors
■ By default, the memory array is erased and the bits are set to 1