HC4GX15 Datasheet, PDF (579/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Design Examples: Dynamic Reconfiguration Controller (ALTGX_RECONFIG)
Figure 2–55 shows the ALTGX_RECONFIG instance connected to both
ALTGX instance 1 and ALTGX instance 2.
Figure 2–55. PMA Controls Reconfiguration for Example 1
2–121
reconfig_clk
Set the What is the number of
channels controlled by the
reconfig controller? option = 12
read
write_all
tx_vodctrl [2:0]
rx_eqctrl [3:0]
reconfig_fromgxb[50:0] (1)
ALTGX_RECONFIG Instance
reconfig_fromgxb[3:0]
data_valid
busy
rx_tx_duplex_sel[1:0]
logical_channel_address[3:0]
Set the What is the starting
channel number? option = 0
ALTGX Instance 1
(Number of Channels is 5)
reconfig_fromgxb1[33:0]
Set the What is the starting
channel number? option = 8
ALTGX Instance 2
(Number of Channels is 3)
reconfig_fromgxb2[16:0]
Note to Figure 2–55:
(1) reconfig_fromgxb[50:0] = {reconfig_fromgxb2[16:0], reconfig_fromgxb1[33:0]}.
Table 2–33 lists the ALTGX and ALTGX_RECONFIG Settings and Instances for
Example 1.
Table 2–33. ALTGX and ALTGX_RECONFIG Settings and Instances for Example 1 (Part 1 of 2)
ALTGX Settings and Instances
ALTGX_RECONFIG Settings and Instance
ALTGX Setting
What is the number of
channels? option in
the General screen
ALTGX Instance 1
5
(Regular transceiver
channels)
ALTGX Instance 2
3
(Regular transceiver
channels)
ALTGX_RECONFIG
Setting
ALTGX_RECONFIG
Instance 1
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
(10).
■ Round it up to the
next multiple of 4.
■ Set this option to
12.
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 3