HC4GX15 Datasheet, PDF (499/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 2: HardCopy IV GX Dynamic Reconfiguration
2–41
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic Reconfiguration
To connect the reconfig_fromgxb port between the ALTGX_RECONFIG instance
and multiple ALTGX instances, follow these rules:
■ Take the reconfig_fromgxb[16:0] of ALTGX instance 1 and connect it to the
reconfig_fromgxb[16:0] of the ALTGX_RECONFIG instance. Connect the
reconfig_fromgxb[] port of the next ALTGX instance to the next available bits
of the ALTGX_RECONFIG instance, and so on.
■ Similarly, connect the reconfig_fromgxb port of the ALTGX instance, which
has the highest What is the starting channel number? option, to the MSB of the
reconfig_fromgxb port of the ALTGX_RECONFIG instance.
The Quartus II Fitter produces an error if the dynamic reconfiguration option is
enabled in the ALTGX instance but the reconfig_fromgxb and reconfig_togxb
ports are not connected to the ALTGX_RECONFIG instance.
Connecting reconfig_fromgxb for Regular Transceiver Channels
Figure 2–13 shows how to connect the reconfig_fromgxb output port of the
ALTGX instance to the reconfig_fromgxb input port of the ALTGX_RECONFIG
instance for regular transceiver channels.
Figure 2–13. reconfig_fromgxb and reconfig_togxb Connections Between the ALTGX_RECONFIG Instance and the ALTGX
Instances (Note 1), (2)
ALTGX_RECONFIG Instance
reconfig_fromgxb [50:0] (1)
reconfig_togxb [3:0]
ALTGX Instance 1
reconfig_togxb [3:0]
reconfig_fromgxb1 [16:0]
ALTGX Instance 2
reconfig_togxb [3:0]
reconfig_fromgxb2 [33:0]
Notes to Figure 2–13:
(1) reconfig_fromgxb[50:0] = {reconfig_fromgxb[16:0], reconfig_fromgxb[33:0]}.
(2) Figure 2–13 assumes that all the channels depicted are regular transceiver channels.
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 3