HC4GX15 Datasheet, PDF (243/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 4: Matching Stratix IV Power and Configuration Requirements with HardCopy IV Devices
4–9
Examples of Mapping a Stratix FPGA Configuration to a HardCopy ASIC
To configure FPGAs on a board with both HardCopy IV devices and FPGAs, you
must remove the HardCopy IV device from the cascade chain. Figure 4–7 shows how
the devices are connected with the HardCopy IV device removed from the chain. The
data in the configuration device must be modified to exclude the HardCopy IV device
configuration data.
Figure 4–7. Configuration with the HardCopy IV Device Removed from the Cascade Chain
V_CCPGM
V_CCPGM
V_CCPGM
10 kΩ 10 kΩ 10 kΩ
V_CCPGM
GND
Stratix IV Device 2
MSEL2
MSEL1
MSEL0
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
N.C. nCEO
nCE
V_CCPGM
GND
HardCopy IV Device
MSEL2
MSEL1
MSEL0
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
N.C. nCEO
nCE
V_CCPGM
GND
Stratix IV Device 1
MSEL2
MSEL1
MSEL0
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
nCEO
nCE
GND
GND
Configuration
Device
DCLK
DATA
OE
nCS
nCASC
nINIT_CONF
Note to Figure 4–7:
(1) The MSEL[2:0] pins are not used on the HardCopy IV device but they preserve the pin assignment and direction from the Stratix IV device,
allowing drop-in replacement.
Eliminating the HardCopy IV device from the configuration chain requires the
following changes:
■ The configuration data stored in the configuration device must be updated to
exclude the configuration data for the HardCopy IV device.
■ The nCE pin of the HardCopy IV device must be tied to GND.
■ The nCE pin of the FPGA that was driven by the HardCopy IV nCEO pin must now
be driven by the nCEO pin of the FPGA that precedes the HardCopy IV device in
the chain.
■ The connections of the MSEL[2:0] pins are not required.
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 2