HC4GX15 Datasheet, PDF (586/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–128
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Design Examples: Dynamic Reconfiguration Controller
Table 2–35. Data Rate Division in TX Dynamic Reconfiguration Mode for Example 4 (Part 2 of 3)
ALTGX Settings and Instances
ALTGX_RECONFIG Settings and Instance
ALTGX Setting
ALTGX Instance 1
(Basic Functional Mode,
Receiver and Transmitter
Operation Mode)
ALTGX_RECONFIG Setting
ALTGX_RECONFIG
Instance 1
What is the input clock
frequency? option
Set the input frequency to
106.25 MHz.
Use the
rate_switch_out port
to read out the current data
rate division option in the
Error checks/Data rate
switch screen.
■ You can optionally enable
the
rate_switch_out
[1:0] output signal by
selecting this option.
■ For more information,
refer to “Total Number of
Channels Controlled by
the ALTGX_RECONFIG
Instance” on page 2–35,
which shows the values
for each of the
rate_switch_ctrl
[1:0] settings.
■ Use the
rate_switch_ctrl
[1:0] signal only for
dividing the data rate of
the transmit side. To
divide the data rate for
both transmit and receive
sides, a .mif-based
approach is required.
What is the starting channel
number? option in the
Reconfig screen. (For more
information, refer to “Total
Number of Channels
Controlled by the
ALTGX_RECONFIG Instance”
on page 2–35).
■ Set this option to 0.
■ The logical channel
addresses of the 1st and
2nd channels are 0 and 1,
respectively.
The logical_channel_
address[1:0] port
■ This port is enabled
automatically because the
number of channels
controlled is more than 1.
■ Specify the channel to be
reconfigured at this
logical_channel_
address [1:0] port.
reconfig_
fromgxb1 output
■ reconfig_fromgxb1 reconfig_fromgxb
is 17 bits wide (1 * 17). input
■ Connect
reconfig_fromgxb1
[16:0] to the
reconfig_fromgxb
[16:0] input of the
ALTGX_RECONFIG
instance.
■ reconfig_fromgxb
is 17 bits wide (1 * 17, 4
regular transceiver
channels can logically fit
into one transceiver
block).
■ Connect
reconfig_fromgxb
[16:0] to the
reconfig_fromgxb1
[16:0] output of the
ALTGX instance.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation