EPCS4 datasheet(30/38 Pages) ALTERA

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Chapter 3: Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet

Programming and Configuration File Support

Configuration Handbook (Complete Two-Volume Set)

Altera Corporation

Programming and Configuration File Support

The Quartus II software provides programming support for serial configuration

devices. After selecting the serial configuration device, the Quartus II software

automatically generates the Programmer Object File (.pof) to program the device. The

software allows users to select the appropriate serial configuration device density that

most efficiently stores the configuration data for a selected FPGA.

The serial configuration device can be programmed in-system by an external

microprocessor using SRunner. SRunner is a software driver developed for embedded

serial configuration device programming that you can customize to fit in different

embedded systems. The SRunner can read .rpd files and write to the serial

configuration devices. The programming time is comparable to the Quartus II

software programming time. Note that writing and reading the .rpd file to the EPCS is

different from other data and address bytes. The LSB of .rpd bytes must be shifted out

first during the read bytes instruction and the LSB of .rpd bytes must be shifted in first

during the write bytes instruction. This is because the FPGA reads the LSB of the .rpd

data first during the configuration process.

f For more information about SRunner, refer to AN 418: SRunner: An Embedded Solution

for Serial Configuration Device Programming User Guide and the source code on the

Altera website (www.altera.com).

Serial configuration devices can be programmed using the APU with the appropriate

programming adapter (PLMSEPC-8) via the Quartus II software, USB Blaster,

EthernetBlaster, or the ByteBlaster II download cable via the Quartus II software. In

addition, many third-party programmers, such as BP Microsystems and System

General, offer programming hardware that supports serial configuration devices.

During in-system programming of a serial configuration device via the USB Blaster,

EthernetBlaster, or ByteBlaster II download cable, the cable pulls nCONFIG low to

reset the FPGA and overrides the 10-k pull-down resistor on the FPGA’s nCE pin

(refer to Figure 3–2). The download cable then uses the four interface pins (DATA, nCS,

ASDI

, and DCLK) to program the serial configuration device. When the programming

is complete, the download cable releases the serial configuration device’s four

interface pins and the FPGA’s nCE pin, and pulses nCONFIG to start configuration.

The FPGA can program the serial configuration device in-system using the JTAG

interface with the Serial FlashLoader. This solution allows you to indirectly program

the serial configuration device using the same JTAG interface that is used to configure

the FPGA.

f For more information about the Serial FlashLoader, refer to AN 370: Using the Serial

FlashLoader with the Quartus II Software.

EPCS4 Datasheet(PDF) 30 Page - Altera Corporation

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