HC4GX15 Datasheet, PDF (582/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–124
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Design Examples: Dynamic Reconfiguration Controller
Table 2–34 lists the ALTGX and ALTGX_RECONFIG Settings and Instances for
Example 2.
Table 2–34. ALTGX and ALTGX_RECONFIG Settings and Instances for Example 2
ALTGX Settings and Instances
ALTGX_RECONFIG Settings and Instance
ALTGX Setting
ALTGX Instance 1
ALTGX Instance 2
ALTGX_RECONFIG
Setting
ALTGX_RECONFIG
Instance 1
What is the number of
channels? option in
the General screen
5
(Regular transceiver
channels)
3
(Regular transceiver
channels)
What is the number of
channels controlled
by the reconfig
controller? option in
the Reconfiguration
settings screen
For more information,
refer to “Total Number
of Channels Controlled
by the
ALTGX_RECONFIG
Instance” on
page 2–35.
■ Determine the
highest logical
channel address
(4).
■ Round it up to the
next multiple of 4.
■ Set this option to 8.
What is the starting
channel number?
option in the Reconfig
screen.
For more information,
refer to “Logical
Channel Addressing”
on page 2–23.
■ Set this option to 0.
■ The logical channel
addresses of the
1st to 5th channels
are 0, 1, 2, 3, and 4,
respectively.
■ Set this option to 0.
■ The logical channel
addresses of the
1st to 3rd channels
are 0, 1, and 2,
respectively.
Use
'logical_channel_add
ress' port for Analog
controls
reconfiguration option
in the Analog controls
screen
■ Select this option.
■ The
ALTGX_RECONFIG
MegaWizard
Plug-In Manager
enables the
logical_
channel_
address[3:0]
input port.
Analog controls
(VOD, Pre-emphasis,
and Manual
Equalization) option in
the Reconfig screen
Enable this option.
Enable this option.
Use the
rx_tx_duplex_
sel port to enable the
RX only, TX only, or
duplex reconfiguration
option in the Error
checks/Data rate
switch screen.
■ Select this option.
■ The
ALTGX_RECONFIG
MegaWizard
Plug-In Manager
enables the
rx_tx_duplex_
sel[1:0] input
port.
The various analog ■ Select the
controls in the Analog tx_vodctrl
controls screen.
control.
■ tx_vodctrl is
3 bits wide.
reconfig_
fromgxb output
reconfig_
fromgxb is 34 bits
wide (2 * 17)
reconfig_
fromgxb is 17 bits
wide (1 * 17)
reconfig_
fromgxb input
reconfig_
fromgxb is 34 bits
wide (2 * 17, 8
channels can logically
fit into three
transceiver blocks).
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation