參數資料
型號: EPM3256ATI144-6
廠商: ALTERA CORP
元件分類: PLD
英文描述: EE PLD, 6 ns, PQFP144
封裝: TQFP-144
文件頁數: 42/43頁
文件大?。?/td> 716K
代理商: EPM3256ATI144-6
8
Altera Corporation
MAX 3000A Programmable Logic Device Family Data Sheet
Preliminary Information
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 (tSEXP) is incurred when
shareable expanders are used. Figure 3 shows how shareable expanders
can feed multiple macrocells.
Figure 3. MAX 3000A 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 5 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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