參數資料
型號: EPM7256SRC208-7N
廠商: Altera
文件頁數: 5/66頁
文件大?。?/td> 0K
描述: IC MAX 7000 CPLD 256 208-RQFP
產品變化通告: Package Change 30/Jun/2010
標準包裝: 24
系列: MAX® 7000
可編程類型: 系統(tǒng)內可編程
最大延遲時間 tpd(1): 7.5ns
電壓電源 - 內部: 4.75 V ~ 5.25 V
邏輯元件/邏輯塊數目: 16
宏單元數: 256
門數: 5000
輸入/輸出數: 164
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 208-BFQFP 裸露焊盤
供應商設備封裝: 208-RQFP(28x28)
包裝: 托盤
Altera Corporation
13
MAX 7000 Programmable Logic Device Family Data Sheet
The compiler can allocate up to three sets of up to five parallel expanders
automatically to the macrocells that require additional product terms.
Each set of five parallel expanders incurs a small, incremental timing
delay (tPEXP). For example, if a macrocell requires 14 product terms, the
Compiler uses the five dedicated product terms within the macrocell and
allocates two sets of parallel expanders; the first set includes five product
terms and the second set includes four product terms, increasing the total
delay by 2 × tPEXP.
Two groups of 8 macrocells within each LAB (e.g., macrocells
1 through 8 and 9 through 16) form two chains to lend or borrow parallel
expanders. A macrocell borrows parallel expanders from lower-
numbered macrocells. For example, macrocell 8 can borrow parallel
expanders from macrocell 7, from macrocells 7 and 6, or from macrocells
7, 6, and 5. Within each group of 8, the lowest-numbered macrocell can
only lend parallel expanders and the highest-numbered macrocell can
only borrow them. Figure 6 shows how parallel expanders can be
borrowed from a neighboring macrocell.
Figure 6. Parallel Expanders
Unused product terms in a macrocell can be allocated to a neighboring macrocell.
Preset
Clock
Clear
Product-
Term
Select
Matrix
Preset
Clock
Clear
Product-
Term
Select
Matrix
Macrocell
Product-
Term Logic
From
Previous
Macrocell
To Next
Macrocell
Product-
Term Logic
36 Signals
from PIA
16 Shared
Expanders
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