MAX 9000 Programmable Logic Device Family Data Sheet
Parallel Expanders
Parallel expanders are unused product terms that can be allocated to a
neighboring macrocell to implement fast, complex logic functions.
Parallel expanders allow up to 20 product terms to directly feed the
macrocell ORlogic, with five product terms provided by the macrocell and
15 parallel expanders provided by neighboring macrocells in the LAB.
Figure 5 shows how parallel expanders can feed the neighboring
macrocell.
Figure 5. MAX 9000 Parallel Expanders
Unused product terms in a macrocell can be allocated to a neighboring macrocell.
33 Row
FastTrack
Interconnect
Signals
LAB Local
Array
From
Previous
Macrocell
Preset
Product-
Term
Select
Matrix
Macrocell
Product-
Term Logic
Clock
Clear
Preset
Product-
Term
Select
Matrix
Macrocell
Product-
Term Logic
Clock
Clear
To Next
Macrocell
16 Local
16 Shared
Feedbacks Expanders
Altera Corporation
11
ALTERA [ ALTERA CORPORATION ]
