Specifications

Using Multiple Configuration Data
To configure multiple Cyclone V devices in a chain using multiple configuration data, connect the devices
to an EPCS or EPCQ device, as shown in the following figure.
Figure 7-7: Multiple Device AS Configuration When Both Devices in the Chain Receive Different Sets of
Configuration Data
DATA
DCLK
nCS
ASDI
EPCS or EPCQ Device FPGA Device Master
FPGA Device Slave
GND
nCE
nCEO
nSTATUS
CONF_DONE
DATA0
DCLK
nCEO
nSTATUS
CONF_DONE
10 kΩ
nCONFIG
nCONFIG
nCE
Buffers
MSEL [4..0]
AS_DATA1
DCLK
nCSO
ASDO
V
CCPGM
MSEL[4..0]
CLKUSR
V
CCPGM
V
CCPGM
10 kΩ 10 kΩ
Connect the pull-up resistors to
V
CCPGM
at a 3.0- or 3.3-V power
supply.
Connect the repeater buffers between the
FPGA master and slave device for AS_DATA1
or DATA0 and DCLK for every fourth device.
You can leave the nCEO pin
unconnected or use it as a user I/O
pin when it does not feed another
device’s nCE pin.
For the appropriate MSEL settings
based on POR delay settings, set the
slave device MSEL setting to the PS
scheme.
For more information, refer to the
MSEL pin settings.
Use the CLKUSR pin to supply the
external clock source to drive DCLK
during configuration.
When a device completes configuration, its nCEO pin is released low to activate the nCE pin of the next
device in the chain. Configuration automatically begins for the second device in one clock cycle.
Estimating the Active Serial Configuration Time
The AS configuration time is mostly the time it takes to transfer the configuration data from an EPCS or
EPCQ device to the Cyclone V device.
Use the following equations to estimate the configuration time:
• AS x1 mode
.rbf Size x (minimum DCLK period / 1 bit per DCLK cycle) = estimated minimum configuration time.
• AS x4 mode
.rbf Size x (minimum DCLK period / 4 bits per DCLK cycle) = estimated minimum configuration time.
Compressing the configuration data reduces the configuration time. The amount of reduction varies depending
on your design.
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
Altera Corporation
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CV-52007
Using Multiple Configuration Data
7-14
2013.06.11