Passive Serial Multi-Device Configuration - Altera Cyclone V Device Handbook

7-22

Passive Serial Multi-Device Configuration

Figure 7-13: Single Device PS Configuration Using an Altera Download Cable
V
CCPGM
10 kΩ
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
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 Cyclone 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
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
it resets the chain by pulling its
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 Cyclone V devices in a chain using multiple configuration data, connect the devices
to the external host as shown in the following figure.
Altera Corporation
V V
CCPGM CCPGM
10 kΩ 10 kΩ
GND
For more information,
refer to the MSEL pin
settings.
and
CONF_DONE nSTATUS
nSTATUS
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
V V
CCPGM
10 kΩ
FPGA Device
CONF_DONE
nSTATUS
MSEL[4..0]
nCE
nCEO N.C.
DCLK
DATA0
nCONFIG
pins together, the devices initialize and enter user mode at the same
pin low.
Connect the pull-up resistor to the
same supply voltage (V
CCPGM
USB-Blaster, ByteBlaster II,
EthernetBlaster, or EthernetBlaster II
10 kΩ
cable.
Download Cable
10-Pin Male Header
(PS Mode)
Pin 1
V
CCIO
GND
V
IO
In the USB-Blaster and
ByteBlaster II cables, this
Shield pin is connected to nCE
GND
when you use it for AS
programming. Otherwise,
this pin is a no connect.
CV-52007
2014.01.10
) as the
CCIO
pin,
nSTATUS
Send Feedback