lc51024vg Lattice Semiconductor Corp., lc51024vg Datasheet - Page 4

• Manufacturer Part Number: lc51024vg
• Description: 3.3v In-system Programmable Superbig, Superwide High Density Plds Tm Tm
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Figure 3. ispMACH 5000B Dual-OR Array
Product Term Sharing Array
The Product Term Sharing Array (PTSA) consists of 32 inputs from the Dual-OR Array and 32 outputs directly to
the macrocells. Each output is the OR term of any combination of the seven PTSA OR terms connected to that out-
put. Every Nth macrocell is connected to N-3, N-2, N-1, N, N+1, N+2, and N+3 PTSA OR terms via a programma-
ble connection. Figure 4 shows the graphical representation of the PTSA.
Figure 4. ispMACH 5000B PTSA
From PT0
From PT1
From PT2
From PT3
From PT4
PTSA OR 29
PTSA OR 30
PTSA OR 31
PTSA OR 0
PTSA OR 1
PTSA OR 2
PTSA OR 3
n
4
PTSA Bypass
ispMACH 5000B Family Data Sheet
PT Preset
PT Reset
PT Clock
PT OE
Macrocell 0
Macrocell 1
Macrocell 2
Macrocell 29
Macrocell 30
Macrocell 31
To I/O Block
To Macrocell
To PTSA
To Macrocell
To Macrocell
To Macrocell