HC4GX15 Datasheet, PDF (500/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–42
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
Table 2–19 shows the connecting reconfig_fromgxb port for regular transceiver
channels.
Table 2–19. Connecting the reconfig_fromgxb Port for Regular Transceiver Channels
ALTGX Settings and Instances
ALTGX_RECONFIG Setting and Instance
ALTGX Setting
ALTGX instance 1
(Basic Functional
Mode)
ALTGX instance 2
(Basic Functional
Mode)
ALTGX_RECONFIG
Setting
ALTGX_RECONFIG
Instance 1
What is the number of
channels? option in
the General screen
What is the starting
channel number?
option in the Reconfig
screen
3
(Regular Transceiver
Channels)
■ Set this option to 0.
■ The logical channel
addresses of the
1st to 3rd channels
are 0, 1, and 2,
respectively.
5
(Regular Transceiver
Channels)
■ Set this option to 4.
■ The logical channel
addresses of the
1st to 5th channels
are 4, 5, 6, 7, and 8,
respectively.
What is the number of
channels controlled
by the reconfig
controller? option in
the Reconfiguration
settings screen.
■ Determine the
highest logical
channel address
(8).
■ Round it up to the
next multiple of 4.
■ Set this option to
12.
reconfig_
fromgxb1 and
reconfig_
fromgxb2 outputs
reconfig_
fromgxb1 is 17 bits
wide
(1 * 17)
reconfig_
fromgxb2 is 34 bits
wide
(2 * 17)
reconfig_
fromgxb input
reconfig_
fromgxb is 51 bits
wide
(12 regular transceiver
channels can logically
fit into 3 transceiver
blocks)
You must connect the reconfig_fromgxb input port of the ALTGX_RECONFIG
instance to both the reconfig_fromgxb1 output port of ALTGX instance 1 and the
reconfig_fromgxb2 output port of ALTGX instance 2, as shown in Figure 2–13 on
page 2–41. The lowest What is the starting channel number? option transceiver block
is connected to the lowest significant bit and so on. The reconfig_fromgxb1 of
ALTGX instance 1 must be connected to the reconfig_fromgxb[16:0] of the
ALTGX_RECONFIG instance. Similarly, the reconfig_fromgxb2 of ALTGX
instance 2 must be connected to the reconfig_fromgxb[50:17] of the
ALTGX_RECONFIG instance.
Connecting reconfig_fromgxb for the PMA-Only Channels
Consider the scenario for PMA-only channels.
Table 2–20. Connecting reconfig_fromgxb and reconfig_togxb for PMA-Only Channels (Part 1 of 2)
ALTGX Setting and Instances
ALTGX MegaWizard
Plug-In Manager
Settings
ALTGX instance 1
configured in Basic
(PMA Direct)
functional mode
ALTGX instance 2
configured in Basic
(PMA Direct)
functional mode
ALTGX_RECONFIG Settings and Instance
ALTGX_RECONFIG
MegaWizard Plug-In
Manager Settings
ALTGX_RECONFIG
instance 1
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation