參數(shù)資料
型號(hào): EPM7256E
廠商: Altera Corporation
英文描述: Programmable Logic Device Family
中文描述: 可編程邏輯器件系列
文件頁(yè)數(shù): 12/62頁(yè)
文件大?。?/td> 1173K
代理商: EPM7256E
12
Altera Corporation
MAX 7000 Programmable Logic Device Family Data Sheet
Shareable Expanders
Each LAB has 16 shareable expanders that can be viewed as a pool of
uncommitted single product terms (one from each macrocell) with
inverted outputs that feed back into the logic array. Each shareable
expander can be used and shared by any or all macrocells in the LAB to
build complex logic functions. A small delay (
t
SEXP
) is incurred when
shareable expanders are used.
Figure5
shows how shareable expanders
can feed multiple macrocells.
Figure 5. Shareable Expanders
Shareable expanders can be shared by any or all macrocells in an LAB.
Parallel Expanders
Parallel expanders are unused product terms that can be allocated to a
neighboring macrocell to implement fast, complex logic functions.
Parallel expanders allow up to 20 product terms to directly feed the
macrocell
OR
logic, with five product terms provided by the macrocell and
15 parallel expanders provided by neighboring macrocells in the LAB.
Macrocell
Product-Term
Logic
Product-Term Select Matrix
Macrocell
Product-Term
Logic
36 Signals
from PIA
16 Shared
Expanders
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