Specifications

Figure 7-6: Single Device AS x4 Mode Configuration
AS_DATA0/
ASDO
AS_DATA1
AS_DATA2
AS_DATA3
DCLK
nCSO
EPCQ Device FPGA Device
10 kΩ10 kΩ10 kΩ
V
CCPGM
GND
nCEO
nCE
nSTATUS
nCONFIG
CONF_DONE
N.C.
MSEL[4..0]
CLKUSR
V
CCPGM
V
CCPGM
DATA0
DATA1
DATA2
DATA3
DCLK
nCS
Connect the pull-up resistors to
V
CCPGM
at 3.0- or 3.3-V power supply.
For more information,
refer to the MSEL pin
settings.
Use the CLKUSR pin to
supply the external clock
source to drive DCLK
during configuration.
Active Serial Multi-Device Configuration
You can configure multiple Cyclone V devices that are connected to a chain. Only AS x1 mode supports
multi-device configuration.
The first device in the chain is the configuration master. Subsequent devices in the chain are configuration
slaves.
Pin Connections and Guidelines
Observe the following pin connections and guidelines for this configuration setup:
•
Hardwire the MSEL pins of the first device in the chain to select the AS configuration scheme. For
subsequent devices in the chain, hardwire their MSEL pins to select the PS configuration scheme. Any
other Altera
®
devices that support the PS configuration can also be part of the chain as a configuration
slave.
• Tie the following pins of all devices in the chain together:
•
nCONFIG
•
nSTATUS
•
DCLK
•
DATA[]
•
CONF_DONE
By tying the CONF_DONE, nSTATUS, and nCONFIG pins together, the devices initialize and enter user
mode at the same time. If any device in the chain detects an error, configuration stops for the entire chain
and you must reconfigure all the devices. For example, if the first device in the chain flags an error on
the nSTATUS pin, it resets the chain by pulling its nSTATUS pin low.
•
Ensure that DCLK and DATA[] are buffered every fourth device to prevent signal integrity and clock
skew problems.
Altera Corporation
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
Send Feedback
7-13
Active Serial Multi-Device Configuration
CV-52007
2013.06.11