Datasheet > M5-192/104-6AC

M5-192/104-6AC

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
莱迪思 - LATTICE		/
页数	文件大小	规格书
47页	1091K
描述
Fifth Generation MACH Architecture

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M5-192/104-6AC 数据手册

OE Generator

Control Generator

Block

Feeder

Product-term

Array

Input Register

Path

Interconnect Feeder

20446G-002

Figure 2. PAL Block Structure

Product-Term Array and Logic Allocator

The product-term array uses the same sum-of-products architecture as PAL devices and consists of

32 inputs (plus their complements) and 64 product terms arranged in 16 clusters. A cluster is a sum-

of-products function with either 3 of 4 product terms.

Logic allocators assign the clusters to macrocells. Each macrocell can accept up to eight clusters of

three or four product terms, but a given cluster can only be steered to one macrocell (Table 4). If

only three product terms in a cluster are steered, the fourth can be used as an input to an XOR

gate for separate logic generation and/or polarity control.

The wide logic allocator is comprised of all 16 of the individual logic allocators and acts as an output

switch matrix by reassigning logic to macrocells to retain pinout as designs change. The logic

allocation scheme in the MACH 5 device allows for the implementation of large equations (up to

32 product terms) with only one pass through the logic array.

Table 4. Product Term Steering Options for PT Clusters and Macrocells

Macrocell

Available Clusters

C , C , C , C , C

Macrocell

Available Clusters

C , C , C , C , C , C , C , C

10 11 12

C , C , C , C , C , C

C , C , C , C , C , C , C , C

6 7 8 9 10 11 12 13

C , C , C , C , C , C , C

C , C , C , C , C , C , C , C

7 8 9 10 11 12 13 14

C , C , C , C , C , C , C , C

8 9 10 11 12 13 14 15

C , C , C , C , C , C , C , C

8 9 10 11 12 13 14 15

C , C , C , C , C , C , C , C

C , C , C , C , C , C , C

9 10 11 12 13 14 15

C , C , C , C , C , C , C , C

C , C , C , C , C , C

10 11 12 13 14 15

C , C , C , C , C , C , C , C

C , C , C , C , C

11 12 13 14 15

MACH 5 Family

1 2 3 456 7 8...47

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