HC4GX15 Datasheet, PDF (492/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–34
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
Table 2–14 shows an example scenario in which the logical channel address of both
the PMA-only channels and regular transceiver channels is set based on the value you
entered in the What is the starting channel number? option.
Table 2–14. Logical Channel Addressing of a Combination of PMA-Only Channels and Regular Transceiver Channels that are
Not in Basic (PMA Direct) Functional Mode for Case 7
ALTGX Instances
ALTGX_RECONFIG Instance
ALTGX MegaWizard Plug-In ALTGX instance 1 configured
Manager Setting
in Basic functional mode
ALTGX instance 2
ALTGX_RECONFIG instance
1:
What is the number of
6
channels? in the General
screen
6
Controls both ALTGX
instance 1 and ALTGX
instance 2.
What is the starting channel Set this option to 0
number? in the Reconfig
screen
Because the starting channel
number increments in steps
of 4, you must set the
starting channel number of
the next ALTGX instance as a
multiple of 4. Therefore, set
this option as 8 for ALTGX
instance 2. This is because
the starting channel numbers
0 and 4 have already been
used in ALTGX instance 1.
For more information, refer
to Table 2–18 on page 2–39
for the ALTGX_RECONFIG
instance 1 settings.
The logical channel
addresses of the first to fifth
channels are 0, 1, 2, 3, and
4, respectively.
The logical channel
addresses of the first to
fourth channels are 8, 12,
16, and 20, respectively.
Highest Possible Logical Channel Address
Table 2–15 shows the highest possible logical channel address assigned to a
transceiver channel in a HardCopy IV GX device.
The maximum number of transceiver channels in the largest HardCopy IV GX device
is 24 (12 transceiver channels located in two transceiver blocks on the right side of the
device and 12 transceiver channels located in two transceiver blocks on the left side of
the device).
These 24 transceiver channels can be individually configured as 24 Transmitter only
and 24 Receiver only channels. You can achieve this by using 24 Transmitter only
ALTGX instances and 24 Receiver only ALTGX instances in your design.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation