EPM3032ATC44-10N Datasheet, PDF (10/46 Pages) Altera Corporation – Programmable Logic Device Family

MAX 3000A Programmable Logic Device Family Data Sheet
Figure 4. MAX 3000A Parallel Expanders
Unused product terms in a macrocell can be allocated to a neighboring macrocell.
From
Previous
Macrocell
Product-
er
Select
Matrix
Preset
Clock
Clear
Macrocell
Product-
Term Logic
36 Signals 16 Shared
from PIA Expanders
Product-
Term
Select
Matrix
Preset
Clock
Clear
Macrocell
Product-
Term Logic
To Next
Macrocell
Programmable Interconnect Array
Logic is routed between LABs on the PIA. This global bus is a
programmable path that connects any signal source to any destination on
the device. All MAX 3000A dedicated inputs, I/O pins, and macrocell
outputs feed the PIA, which makes the signals available throughout the
entire device. Only the signals required by each LAB are actually routed
from the PIA into the LAB. Figure 5 shows how the PIA signals are routed
into the LAB. An EEPROM cell controls one input to a two-input AND gate,
which selects a PIA signal to drive into the LAB.
10
Altera Corporation