HC4GX15 Datasheet, PDF (482/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–24
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
This value determines the logical channel address of all the transceiver channels in the
ALTGX instance. You must always set the starting channel number in an ALTGX
instance as a multiple of 4.
1 You must set the next multiple of 4 for the What is the starting channel number?
option of the following ALTGX instances, if any.
1 Based on the value you entered for the What is the starting channel number? option,
the ATLGX MegaWizard Plug-In Manager assigns consecutive numbers as the logical
channel address for all the channels within an ALTGX instance.
The following sections describe the logical channel addressing of regular transceiver
channels for five example scenarios in detail.
1 The first three example scenarios: Case 1, 2, and 3 have a single ALTGX_RECONFIG
instance connected to two ALTGX instances. The difference between these three cases
is the number of channels configured in the ALTGX instances.
Regular Transceiver Channels: Case 1
Table 2–4 shows an example scenario for Case 1.
Table 2–4. Example Scenarios for Logical Channel Addressing in ALTGX Instances for Case 1
Example Scenario
Case 1
Number of ALTGX Instances
Two ALTGX instances:
■ ALTGX instance 1 (1 channel)
■ ALTGX instance 2 (3 channels)
Number of ALTGX_RECONFIG
Instances
One ALTGX_RECONFIG instance
controlling both the ALTGX instances
Table 2–5 shows the logical channel addressing of regular transceiver channels in
Case 1.
Table 2–5. Logical Channel Addressing of Regular Transceiver Channels for Case 1
ALTGX Instances
ALTGX_RECONFIG Instance
ALTGX MegaWizard Plug-In
Manager Setting
What is the number of
channels? in the General
screen
ALTGX instance 1
1
Set this option to 0
What is the starting channel
number? in the Reconfig
screen
The logical channel
addresses of the first
channel is 0
ALTGX instance 2
ALTGX_RECONFIG instance
1:
3
Controls both ALTGX
instance 1 and ALTGX
instance 2.
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 to 4.
Refer to Table 2–16 on
page 2–37 for the
ALTGX_RECONFIG instance
1 settings.
The logical channel
addresses of the first to third
channels are 4, 5, and 6,
respectively.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation