HC4GX15 Datasheet, PDF (487/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 2: HardCopy IV GX Dynamic Reconfiguration
2–29
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic Reconfiguration
For Case 3, do not set the What is the starting channel number? option to 4 for
ALTGX instance 2 (as in Case 1) because the logical channel addresses 4 and 5 are
used already for the fifth and sixth channels of ALTGX instance 1. Instead, use the
next multiple of 4 to assign it as the starting channel number of ALTGX instance 2.
Figure 2–10 shows the logical channel addresses of all the channels within ALTGX
instance 1 and ALTGX instance 2.
Figure 2–10. Block Diagram of the ALTGX Instances and ALTGX_RECONFIG Instance for Case 3 (Note 1)
ALTGX Instance 1
Six Channel Instance
The What is the starting channel number? option = 0
Set the What is the number of
channels controlled by the
(1)
reconfig controller? option = 16
reconfig_fromgxb [67:0] (2)
ALTGX_RECONFIG Instance
Case 3
reconfig_fromgxb [33:0]
Tx only Channel 0
(logical_address_channel = 0)
Tx only Channel 1
(logical_address_channel = 1)
Tx only Channel 2
(logical_address_channel = 2)
Tx only Channel 3
(logical_address_channel = 3)
Tx only Channel 4
(logical_address_channel = 4)
Tx only Channel 5
(logical_address_channel = 5)
ALTGX Instance 2
Six Channel Instance
The What is the starting channel number? option = 8
Rx only Channel 0
(logical_address_channel = 8)
Rx only Channel 1
(logical_address_channel = 9)
reconfig_fromgxb [33:0]
Rx only Channel 2
(logical_address_channel = 10)
Rx only Channel 3
(logical_address_channel = 11)
Rx only Channel 4
(logical_address_channel = 12)
Rx only Channel 5
(logical_address_channel = 13)
reconfig_togxb [3:0]
Notes to Figure 2–10:
(1) For more information, refer to “Regular Transceiver Channels: Case 3” on page 2–28.
(2) reconfig_fromgxb[67:0] = {reconfig_fromgxb[33:0], reconfig_fromgxb[33:0]}.
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 3