EPM7256BUC169-10N Altera, EPM7256BUC169-10N Datasheet - Page 11

• Manufacturer Part Number: EPM7256BUC169-10N
• Description: MAX 7000/S/AE/B
• Manufacturer: Altera

Figure 4. MAX 7000B Parallel Expanders
Altera Corporation
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 7000B 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 two-input AND gate,
which selects a PIA signal to drive into the LAB.
Product-
Product-
Select
Matrix
Select
Matrix
Term
Term
Macrocell
MAX 7000B Programmable Logic Device Data Sheet
Previous
From
Figure 5
shows how the PIA signals are routed
Macrocell
To Next
Preset
Clock
Clear
Preset
Clock
Clear
Macrocell
Product-
Term Logic
Macrocell
Product-
Term Logic
11