8-22
Passive Serial Multi-Device Configuration
Figure 8-13: Single Device PS Configuration Using an Altera Download Cable
Connect the pull-up resistor to the
SV51010
2014.01.10
V CCPGM
V CCPGM
V CCPGM
V CCPGM
V CCPGM
same supply voltage (V CCIO ) as the
USB-Blaster, ByteBlaster II,
10 kΩ
10 kΩ
10 kΩ
FPGA Device
10 kΩ
10 kΩ
EthernetBlaster, or EthernetBlaster II
cable.
CONF_DONE
nSTATUS
MSEL[4..0]
V CCIO
GND
nCE
DCLK
DATA0
nCONFIG
nCEO
N.C.
Download Cable
10-Pin Male Header
(PS Mode)
Pin 1
V IO
GND
You only need the pull-up resistors on
DATA0 and DCLK if the download
cable is the only configuration scheme
used on your board. This ensures that
DATA0 and DCLK are not left floating
after configuration. For example, if you
For more information,
refer to the MSEL pin
settings.
Shield
GND
In the USB-Blaster and
ByteBlaster II cables, this
pin is connected to nCE
when you use it for AS
programming. Otherwise,
this pin is a no connect.
are also using a MAX II device, MAX V
device, or microprocessor, you do not
need the pull-up resistors on DATA0
and DCLK.
Passive Serial Multi-Device Configuration
You can configure multiple Stratix V devices that are connected in a chain.
Pin Connections and Guidelines
Observe the following pin connections and guidelines for this configuration setup:
? Tie the following pins of all devices in the chain together:
?
?
?
?
?
nCONFIG
nSTATUS
DCLK
DATA0
CONF_DONE
By tying the CONF_DONE and nSTATUS 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.
? If you are configuring the devices in the chain using the same configuration data, the devices must be of
the same package and density.
Using Multiple Configuration Data
To configure multiple Stratix V devices in a chain using multiple configuration data, connect the devices to
the external host as shown in the following figure.
Altera Corporation
Configuration, Design Security, and Remote System Upgrades in Stratix V Devices
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