HC4GX15 Datasheet, PDF (580/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–122
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Design Examples: Dynamic Reconfiguration Controller
Table 2–33. ALTGX and ALTGX_RECONFIG Settings and Instances for Example 1 (Part 2 of 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 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 8.
■ The logical channel
addresses of the
1st to 3rd channels
are 8, 9, and 10,
respectively.
Use the
'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
controls in the Analog
controls screen.
■ Select the
tx_vodctrl and
rx_eqctrl
controls.
■ tx_vodctrl is
3 bits wide
■ rx_eqctrl is
4 bits wide.
reconfig_
fromgxb1 and
reconfig_
fromgxb2 outputs.
reconfig_
reconfig_
reconfig_
fromgxb1 is 34 bits fromgxb2 is 17 bits fromgxb input
wide (2 * 17)
wide (1 * 17)
reconfig_
fromgxb is 51 bits
wide (3 * 17, 12
channels can logically
fit into three
transceiver blocks)
ALTGX Instances and ALTGX_RECONFIG Instances Connections
Use the following steps to connect the ALTGX and ALTGX_RECONFIG instances:
1. Connect the reconfig_fromgxb1[33:0] output port from ALTGX instance 1 to
the reconfig_fromgxb [33:0] input port of the ALTGX_RECONFIG instance.
2. Similarly, connect the reconfig_fromgxb2[16:0] output port from ALTGX
instance 2 to the reconfig_fromgxb[50:34] input port of the
ALTGX_RECONFIG instance.
3. Connect the reconfig_togxb[3:0] output port of the ALTGX_RECONFIG
instance to the reconfig_togxb[3:0] input ports of both ALTGX instance 1
and ALTGX instance 2.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation