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SLG46140
11.0 Combinatorial Logic
Combinatorial logic is supported via nine Lookup Tables (LUTs) within the SLG46140. There are four 2-bit LUTs and four 3-bit
LUTs. The device also includes eight Combination Function Macrocells that can be used as LUTs. For more details, please see
Section
12.0 Combination Function Macrocells
.
Inputs/Outputs for the eight LUTs are configured from the connection matrix with specific logic functions being defined by the state
of NVM bits. The outputs of the LUTs can be configured to any user defined function, including the following standard digital logic
devices (AND, NAND, OR, NOR, XOR, XNOR).
11.1 2-Bit LUT
The four 2-bit LUTs each take in two input signals from the connection matrix and produce a single output, which goes back into
the connection matrix.
Figure 38. 2-bit LUTs
2-bit LUT0
OUT
IN1
IN0
reg <851:848>
From Connection
Matrix Output <0>
From Connection
Matrix Output <1>
To Connection
Matrix Input <1>
2-bit LUT1
OUT
IN1
IN0
reg <855:852>
From Connection
Matrix Output <2>
From Connection
Matrix Output <3>
To Connection
Matrix Input <2>
2-bit LUT2
OUT
IN1
IN0
reg <859:856>
From Connection
Matrix Output <4>
From Connection
Matrix Output <5>
To Connection
Matrix Input <3>
2-bit LUT3
OUT
IN1
IN0
reg <863:860>
From Connection
Matrix Output <6>
From Connection
Matrix Output <7>
To Connection
Matrix Input <4>
Table 37. 2-bit LUT0 Truth Table
IN1
IN0
OUT
0
0
reg <848>
0
1
reg <849>
1
0
reg <850>
1
1
reg <851>
Table 38. 2-bit LUT1 Truth Table
IN1
IN0
OUT
0
0
reg <852>
0
1
reg <853>
1
0
reg <854>
1
1
reg <855>
Table 39. 2-bit LUT2 Truth Table
IN1
IN0
OUT
0
0
reg <856>
0
1
reg <857>
1
0
reg <858>
1
1
reg <859>
Table 40. 2-bit LUT3 Truth Table
IN1
IN0
OUT
0
0
reg <860>
0
1
reg <861>
1
0
reg <862>
1
1
reg <863>
Содержание GreenPAK SLG46140
Страница 102: ...000 0046140 111 Page 101 of 169 SLG46140 14 1 Initial Polarity Operations Figure 54 DFF Polarity Operations ...
Страница 103: ...000 0046140 111 Page 102 of 169 SLG46140 Figure 55 DFF Polarity Operations with nReset ...
Страница 104: ...000 0046140 111 Page 103 of 169 SLG46140 Figure 56 DFF Polarity Operations with nSet ...