DK-DEV-5SGXEA7N【PDF 236/527 页】KIT DEV STRATIX V FPGA 5SGXEA7

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8-16

Controlling EPCS and EPCQ Devices

SV51010

2014.01.10

Related Information

? Serial Configuration (EPCS) Devices Datasheet

? Quad-Serial Configuration (EPCQ) Devices Datasheet

Controlling EPCS and EPCQ Devices

During configuration, Stratix V devices enable the EPCS or EPCQ device by driving its nCSO output pin low,

which connects to the chip select ( nCS ) pin of the EPCS or EPCQ device. Stratix V devices use the DCLK and

ASDO pins to send operation commands and read address signals to the EPCS or EPCQ device. The EPCS

or EPCQ device provides data on its serial data output ( DATA[] ) pin, which connects to the AS_DATA[] input

of the Stratix V devices.

Note: If you wish to gain control of the EPCS pins, hold the nCONFIG pin low and pull the nCE pin high.

This causes the device to reset and tri-state the AS configuration pins.

Trace Length and Loading

The maximum trace length and loading apply to both single- and multi-device AS configuration setups as

listed in the following table. The trace length is the length from the Stratix V device to the EPCS or EPCQ

device.

Table 8-5: Maximum Trace Length and Loading for AS x1 and x4 Configurations for Stratix V Devices

Stratix V Device AS Pins

Maximum Board Trace Length (Inches)

12.5/ 25/ 50 MHz 100 MHz

Maximum Board Load (pF)

DCLK

DATA[3..0]

nCSO

10

10

10

6

6

6

5

10

10

Programming EPCS and EPCQ Devices

You can program EPCS and EPCQ devices in-system using a USB-Blaster ? , EthernetBlaster, EthernetBlaster II,

or ByteBlaster ? II download cable. Alternatively, you can program the EPCS or EPCQ using a microprocessor

with the SRunner software driver.

In-system programming (ISP) offers you the option to program the EPCS or EPCQ either using an AS

programming interface or a JTAG interface. Using the AS programming interface, the configuration data

is programmed into the EPCS by the Quartus II software or any supported third-party software. Using the

JTAG interface, an Altera IP called the serial flash loader (SFL) must be downloaded into the Stratix V device

to form a bridge between the JTAG interface and the EPCS or EPCQ. This allows the EPCS or EPCQ to be

programmed directly using the JTAG interface.

Related Information

? AN 370: Using the Serial FlashLoader with the Quartus II Software

? AN 418: SRunner: An Embedded Solution for Serial Configuration Device Programming

Altera Corporation

Configuration, Design Security, and Remote System Upgrades in Stratix V Devices

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