la-ispmach4032v Lattice Semiconductor Corp., la-ispmach4032v Datasheet - Page 4

• Manufacturer Part Number: la-ispmach4032v
• Description: 3.3v/1.8v In-system Programmable Superfast High Density Plds Tm
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Figure 3. AND Array
Enhanced Logic Allocator
Within the logic allocator, product terms are allocated to macrocells in product term clusters. Each product term
cluster is associated with a macrocell. The cluster size for the LA-ispMACH 4000V/Z automotive family is 4+1 (total
5) product terms. The software automatically considers the availability and distribution of product term clusters as it
fits the functions within a GLB. The logic allocator is designed to provide three speed paths: 5-PT fast bypass path,
20-PT Speed Locking path and an up to 80-PT path. The availability of these three paths lets designers trade tim-
ing variability for increased performance.
The enhanced Logic Allocator of the LA-ispMACH 4000V/Z automotive family consists of the following blocks:
Figure 4 shows a macrocell slice of the Logic Allocator. There are 16 such slices in the GLB.
Figure 4. Macrocell Slice
• Product Term Allocator
• Cluster Allocator
• Wide Steering Logic
Individual Product
Term Allocator
Cluster
In[34]
In[35]
In[0]
n
Note:
Indicates programmable fuse.
n+1
to
n-1
to
LA-ispMACH 4000V/Z Automotive Family Data Sheet
n-2
to
Allocator
Cluster
4
5-PT
from
n+2
from
n-1
from
from
n+1
n-4
PT0
PT1
PT2
PT3
PT4
PT75
PT76
PT77
PT78
PT79
From
n-4
PT80
PT81
PT82
Cluster 0
Cluster 15
Shared PT Clock
Shared PT Initialization
Shared PTOE
Steering Logic
SuperWIDE™
1-80
PTs
To n+4
To XOR (MC)
Fast 5-PT
Path