CDPCLK4 datasheet(179/274 Pages) ALTERA

179 / 274 page

Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family

9–21

Configuration Features

August 2012

Altera Corporation

Cyclone III Device Handbook

Volume 1

Programming Serial Configuration Devices

Serial configuration devices are non-volatile, flash memory-based devices. You can

program these devices in-system using the USB-Blaster™ or ByteBlaster™ II

download cable. Alternatively, you can program them using the Altera Programming

Unit (APU), supported third-party programmers, or a microprocessor with the

SRunner software driver.

You can perform in-system programming of serial configuration devices using the AS

programming interface. During in-system programming, the download cable disables

device access to the AS interface by driving the nCE pin high. Cyclone III device family

is also held in reset by a low level on nCONFIG. After programming is complete, the

download cable releases nCE and nCONFIG, allowing the pull-down and pull-up

resistors to drive GND and VCC, respectively.

To perform in-system programming of a serial configuration device using the AS

programming interface, the diodes and capacitors must be placed as close as possible

to the Cyclone III device family. Ensure that the diodes and capacitors maintain a

maximum AC voltage of 4.1 V (Figure 9–7).

1 If you wish to use the same setup shown in Figure 9–7 to perform in-system

programming of a serial configuration device and single- or multi-device AS

configuration, you do not need a series resistor on the DATA line at the near end of the

serial configuration device. The existing diodes and capacitors are sufficient.

Altera has developed the Serial FlashLoader (SFL), a JTAG-based in-system

programming solution for Altera serial configuration devices. The SFL is a bridge

design for the Cyclone III device family that uses its JTAG interface to access the

EPCS JIC (JTAG Indirect Configuration Device Programming) file and then uses the

AS interface to program the EPCS device. Both the JTAG interface and AS interface

are bridged together inside the SFL design.

f For more information about implementing the SFL with Cyclone III device family,

refer to AN 370: Using the Serial FlashLoader with the Quartus II Software.

f For more information about the USB-Blaster download cable, refer to the USB-Blaster

Download Cable User Guide. For more information about the ByteBlaster II download

cable, refer to the ByteBlaster II Download Cable User Guide.

CDPCLK4 Scheda tecnica(PDF) 179 Page - Altera Corporation