參數(shù)資料
型號(hào): M4A3-256/128-7VI
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: PLD
英文描述: CAP 1500UF 100V ELECT KMH SNAP
中文描述: EE PLD, 7.5 ns, PQFP176
封裝: TQFP-176
文件頁(yè)數(shù): 2/62頁(yè)
文件大小: 2620K
代理商: M4A3-256/128-7VI
10
MACH 4 Family
Each PAL block consists of:
x
Product-term array
x
Logic allocator
x
Macrocells
x
Output switch matrix
x
I/O cells
x
Input switch matrix
x
Clock generator
Product-Term Array
The product-term array consists of a number of product terms that form the basis of the logic
being implemented. The inputs to the AND gates come from the central switch matrix (Table 9),
and are provided in both true and complement forms for efcient logic implementation.
Because the number of product terms available for a given logic function is not xed, the full
sum of products is not realized in the array. The product terms drive the logic allocator, which
allocates the appropriate number of product terms to generate the function.
Logic Allocator
Within the logic allocator, product terms are allocated to macrocells in “product term clusters.”
The availability and distribution of product term clusters are automatically considered by the
software as it ts functions within a PAL block. The size of a product term cluster has been
optimized to provide high utilization of product terms, making complex functions using many
product terms possible. Yet when few product terms are used, there will be a minimal number
Table 9. PAL Block Inputs
Device
Number of Inputs to PAL Block
M4-32/32 and M4LV-32/32
M4-64/32 and M4LV-64/32
M4-96/48 and M4LV-96/48
M4-128/64 and M4LV-128/64
M4-128N/64 and M4LV-128N/64
33
M4-192/96 and M4LV-192/96
M4-256/128 and M4LV-256/128
34
M4A3-32/32 and M4A5-32/32
M4A3-64/32 and M4A5-64/32
M4A3-96/48 and M4A5-96/48
M4A3-128/64 and M4A5-128/64
33
M4A3-192/96 and M4A5-192/96
M4A3-256/128 and M4A5-256/128
34
M4A3-64/64
M4A3-128/96 and M4A3-128/128
M4A3-192/68 and M4A3-192/128
M4A3-256/160 and M4A3-256/192
M4A3-384
M4A3-512
36
相關(guān)PDF資料
PDF描述
M4A3-384/192-10AC High Performance E 2 CMOS In-System Programmable Logic
M4A3-384/192-10AI High Performance E 2 CMOS In-System Programmable Logic
M4A3-384/192-14AI High Performance E 2 CMOS In-System Programmable Logic
M4A3-384/192-65AC High Performance E 2 CMOS In-System Programmable Logic
M4A3-256/128-12AI High Performance E 2 CMOS In-System Programmable Logic
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