Altera Corporation 11–19
July 2005 Stratix Device Handbook, Volume 2
Configuring Stratix & Stratix GX Devices
During configuration and initialization, and before the device enters user
mode, the microprocessor must not drive the CONF_DONE signal low.
1 If the optional CLKUSR pin is used and nCONFIG is pulled low
to restart configuration during device initialization, you need to
ensure CLKUSR continues toggling during the time nSTATUS is
low (maximum of 40 µs).
Figure 11–8 shows the circuit for PS configuration with a microprocessor.
Figure 11–8. PS Configuration Circuit with Microprocessor
PS Configuration Timing
Figure 11–9 shows the PS configuration timing waveform for Stratix and
Stratix GX devices. Table 11–8 shows the PS timing parameters for Stratix
and Stratix GX devices.
Microprocessor
CONF_DONE
nSTATUS
nCE
DATA0
nCONFIG
Stratix Device
Memory
ADDR DATA0
GND
MSEL1
MSEL2
V
CC
V
CC
10 kΩ 10 k Ω
GND
DCLK
nCEO
N.C.
MSEL0
V
CC
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