EP2AGX95EF29C6N Datasheet, PDF (316/380 Pages) Altera Corporation – Device Interfaces and Integration

9–30
Chapter 9: Configuration, Design Security, and Remote System Upgrades in Arria II Devices
PS Configuration
Table 9–12. PS Timing Parameters for Arria II Devices (Part 2 of 2)
Symbol
Parameter
Minimum
Maximum
Units
f_MAX
DCLK frequency
t_R
Input rise time
t
Input fall time
—
125
MHz
—
40
ns
—
40
ns
t_CD2UM
t_CD2CU
CONF_DONE high to user mode (3)
CONF_DONE high to CLKUSR enabled
55
150
s
4 × maximum
DCLK period
—
—
t_CD2UMC CONF_DONE high to user mode with CLKUSR option on
t_CD2CU + (8532
CLKUSR period)
—
—
Notes to Table 9–12:
(1) This value is applicable if you do not delay configuration by externally holding the nSTATUS low.
(2) This value is applicable if you do not delay configuration by extending the nCONFIG or nSTATUS low pulse width.
(3) The minimum and maximum numbers apply only if you choose the internal oscillator as the clock source for initializing the device.
f For more information about device configuration options and how to create
configuration files, refer to the Device Configuration Options and Configuration File
Formats chapters in volume 2 of the Configuration Handbook.
PS Configuration Using a Download Cable
1 In this section, the generic term “download cable” includes the Altera USB-Blaster
USB port download cable, ByteBlaster II parallel port download cable,
EthernetBlaster download cable, and EthernetBlaster II download cable.
In a PS configuration with a download cable, an intelligent host (such as a PC)
transfers data from a storage device to the Arria II device using the download cable.
During configuration, the programming hardware or download cable places the
configuration data one bit at a time on the device’s DATA0 pin. The configuration data
is clocked into the target device until CONF_DONE goes high.
When using a download cable, setting the Auto-restart configuration after error
option does not affect the configuration cycle because you must manually restart the
configuration in the Quartus II software when an error occurs. Additionally, the
Enable user-supplied start-up clock (CLKUSR) option has no affect on the device
initialization because this option is disabled in the .sof when programming the device
using the Quartus II programmer and download cable. Therefore, if you turn on the
CLKUSR option, you are not required to provide a clock on the CLKUSR pin when you
are configuring the device with the Quartus II programmer and a download cable.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
July 2012 Altera Corporation