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Active Serial Multi-Device Configuration
SV51010
2014.01.10
Active Serial Multi-Device Configuration
You can configure multiple Stratix 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.
Note: The AS multi-device configuration scheme does not support 100 MHz DCLK frequency.
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.
Using Multiple Configuration Data
To configure multiple Stratix V devices in a chain using multiple configuration data, connect the devices to
an EPCS or EPCQ device, as shown in the following figure.
Altera Corporation
Configuration, Design Security, and Remote System Upgrades in Stratix V Devices
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