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MAX3000A_06 Datasheet(数据表) 6 Page - Altera Corporation

部件型号  MAX3000A
说明  Programmable Logic Device Family
下载  46 Pages
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制造商  ALTERA [Altera Corporation]
网页  http://www.altera.com
标志 ALTERA - Altera Corporation

MAX3000A Datasheet(HTML) 6 Page - Altera Corporation

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Altera Corporation
MAX 3000A Programmable Logic Device Family Data Sheet
Macrocells
MAX 3000A macrocells can be individually configured for either
sequential or combinatorial logic operation. Macrocells consist of three
functional blocks: logic array, product–term select matrix, and
programmable register. Figure 2 shows a MAX 3000A macrocell.
Figure 2. MAX 3000A Macrocell
Combinatorial logic is implemented in the logic array, which provides
five product terms per macrocell. The product–term select matrix
allocates these product terms for use as either primary logic inputs (to the
OR
and XOR gates) to implement combinatorial functions, or as secondary
inputs to the macrocell’s register preset, clock, and clock enable control
functions.
Two kinds of expander product terms (“expanders”) are available to
supplement macrocell logic resources:
Shareable expanders, which are inverted product terms that are fed
back into the logic array
Parallel expanders, which are product terms borrowed from adjacent
macrocells
The Altera development system automatically optimizes product–term
allocation according to the logic requirements of the design.
Product-
Term
Select
Matrix
36 Signals
from PIA
16 Expander
Product Terms
LAB Local Array
Parallel Logic
Expanders
(from other
macrocells)
Shared Logic
Expanders
Clear
Select
Global
Clear
Global
Clocks
Clock/
Enable
Select
2
PRN
CLRN
Q
ENA
Register
Bypass
To I/O
Control
Block
To PIA
Programmable
Register
VCC
D/T




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