參數(shù)資料
型號(hào): MAX7000B
廠商: Altera Corporation
英文描述: Programmable Logic Device
中文描述: 可編程邏輯器件
文件頁(yè)數(shù): 7/66頁(yè)
文件大?。?/td> 421K
代理商: MAX7000B
Altera Corporation
7
MAX 7000B Programmable Logic Device Data Sheet
Macrocells
The MAX 7000B macrocell can be individually configured for either
sequential or combinatorial logic operation. The macrocell consists of
three functional blocks: the logic array, the product-term select matrix,
and the programmable register.
Figure 2
shows the MAX 7000B
macrocell.
Figure 2. MAX 7000B 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
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
D/T
CLRN
Q
ENA
Register
Bypass
To I/O
Control
Block
From
I/O pin
To PIA
Programmable
Register
Fast Input
Select
VCC
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