
Altera Corporation
7–21
January 2008
Stratix II Device Handbook, Volume 2
Configuring Stratix II and Stratix II GX Devices
Figure 7–5. Multiple-Device FPP Configuration Using an External Host When Both Devices Receive the Same
Data
(1)
The pull-up resistor should be connected to a supply that provides an acceptable input signal for all devices in the
chain. VCC should be high enough to meet the VIH specification of the I/O on the device and the external host.
(2)
The nCEO pins of both Stratix II or Stratix II GX devices are left unconnected when configuring the same
configuration data into multiple devices.
You can use a single configuration chain to configure Stratix II or
Stratix II GX devices with other Altera devices that support FPP
configuration, such as Stratix devices. To ensure that all devices in the
chain complete configuration at the same time or that an error flagged by
one device initiates reconfiguration in all devices, tie all of the device
CONF_DONE
and nSTATUS pins together.
f
For more information on configuring multiple Altera devices in the same
volume 2 of the Configuration Handbook.
FPP Configuration Timing
Figure 7–6 shows the timing waveform for FPP configuration when using
a MAX II device as an external host. This waveform shows the timing
when the decompression and the design security feature are not enabled.
CONF_DONE
nSTATUS
nCE
DATA[7..0]
nCONFIG
Stratix II Device
Memory
ADDR DATA[7..0]
GND
VCC (1)
DCLK
nCEO
N.C. (2)
CONF_DONE
nSTATUS
nCE
DATA[7..0]
nCONFIG
Stratix II Device
GND
DCLK
nCEO
N.C. (2)
10 k
Ω
10 k
Ω
External Host
(MAX II Device or
Microprocessor)
MSEL[3..0]
GND
MSEL[3..0]
GND