HC4GX15 Datasheet, PDF (490/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–32
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
Table 2–12 shows an example scenario for Case 5.
Table 2–12. Example Scenarios for Logical Channel Addressing in ALTGX Instances for Case 5
Example Scenario
Number of ALTGX Instances
Number of ALTGX_RECONFIG
Instances
Case 5
One ALTGX instance (ALTGX
instance 1) stamped five times
One ALTGX_RECONFIG instance
controlling all five stamped ALTGX.v
or ALTGX.vhd instances
ALTGX Instance 1 Parameter Settings
Set the What is the starting channel number? option to 0. This implies that the
ATLGX MegaWizard Plug-In Manager sets the logical channel address of the single
channel of ALTGX instance 1 = 0.
When you stamp the above configured transceiver instance five times, the starting
channel numbers of the other four instances (assume instance 2, instance 3, instance 4,
instance 5) are 4, 8, 12, and 16, respectively.
Specify the starting channel number of the other stamped instances using the
defparam parameter (for Verilog) as shown:
defparam instance2. starting_channel_number = 4;
defparam instance3. starting_channel_number = 8; and so on for the
remaining stamped instances.
Logical Channel Addressing of PMA-Only Channels
This section describes how to set the What is the starting channel number? option for
ALTGX instances with PMA-only channels. If your design requires only the PMA
portion of the transceiver channels, configure the ALTGX MegaWizard Plug-In
Manager in Basic (PMA direct) functional mode in the General screen. Therefore, all
the channels in the ALTGX instance are configured as PMA-only channels.
The PMA-only channels are comprised of CMU channels, regular transceiver
channels configured in Basic (PMA direct) functional mode, or both CMU channels
and regular transceiver channels configured in Basic (PMA direct) functional mode.
1 CMU channels are always PMA-only channels. The regular transceiver channels can
be optionally configured as PMA-only channels.
Set the starting channel number for the PMA-only channels in the same What is the
starting channel number? option shown in Figure 2–7 on page 2–23.
The value you set in the What is the starting channel number? option determines the
logical channel addresses of all the PMA-only channels within the ALTGX instance.
You must always set the What is the starting channel number? option as a multiple
of 4.
The logical channel addresses of the PMA-only channels within the same ALTGX
instance also increment in multiples of 4 (unlike the logical channel addressing of
regular transceiver channels that are not configured in Basic (PMA direct) functional
mode, where the logical channel address increments in steps of 1 within the same
ALTGX instance).
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation