MAX7000AE ALTERA [Altera Corporation], MAX7000AE Datasheet - Page 12

• Manufacturer Part Number: MAX7000AE
• Description: Programmable Logic Device
• Manufacturer: ALTERA [Altera Corporation]

MAX 7000A Programmable Logic Device Data Sheet
Figure 4. MAX 7000A Parallel Expanders
12
Unused product terms in a macrocell can be allocated to a neighboring macrocell.
36 Signals
from PIA
Expanders
16 Shared
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 7000A 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.
into the LAB. An EEPROM cell controls one input to a 2-input AND gate,
which selects a PIA signal to drive into the LAB.
Product-
Product-
Select
Select
Matrix
Matrix
Term
Term
Macrocell
Previous
From
Figure 5
shows how the PIA signals are routed
Macrocell
To Next
Preset
Clock
Preset
Clear
Clock
Clear
Altera Corporation
Macrocell
Product-
Term Logic
Macrocell
Product-
Term Logic