Controlling Epcs And Epcq Devices; Trace Length And Loading; Programming Epcs And Epcq Devices - Altera Cyclone V Device Handbook

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Controlling EPCS and EPCQ Devices

Related Information
Serial Configuration (EPCS) Devices Datasheet
Quad-Serial Configuration (EPCQ) Devices Datasheet
Controlling EPCS and EPCQ Devices
During configuration, Cyclone V devices enable the EPCS or EPCQ device by driving its
low, which connects to the chip select (
and
DCLK ASDO
The EPCS or EPCQ device provides data on its serial data output (
input of the Cyclone V devices.
AS_DATA[]
Note: If you wish to gain control of the EPCS pins, hold the
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 Cyclone V device to the EPCS or EPCQ
device.
Table 7-5: Maximum Trace Length and Loading for AS x1 and x4 Configurations for Cyclone V Devices
Cyclone V Device AS Pins
DCLK
DATA[3..0]
nCSO

Programming EPCS and EPCQ Devices

You can program EPCS and EPCQ devices in-system using a USB-Blaster
™
or ByteBlaster
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 Cyclone 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
nCS
pins to send operation commands and read address signals to the EPCS or EPCQ device.
Maximum Board Trace Length (Inches)
12.5/ 25/ 50 MHz
10
10
10
II download cable. Alternatively, you can program the EPCS or EPCQ using a microprocessor
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
) pin of the EPCS or EPCQ device. Cyclone V devices use the
DATA[]
nCONFIG
100 MHz
6
6
6
nCSO
) pin, which connects to the
pin low and pull the
nCE
Maximum Board Load (pF)
5
10
10
™
, EthernetBlaster, EthernetBlaster II,
Send Feedback
CV-52007
2014.01.10
output pin
pin high.