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SLG46140
12.6 4-Bit LUT or 14-Bit Counter / Delay Macrocells
There is one macrocell that can serve as a 4-bit LUT or as Counter / Delay. When used to implement LUT functions, the 4-bit
LUTs each take in four input signals from the connection matrix and produce a single output, which goes back into the connection
matrix. When used to implement 14-Bit Counter / Delays function, two of the four input signals from the connection matrix go to
the external clock (ext_CLK) and reset (DLY_In/CNT_Reset) for the counter/delay, with the output going back to the connection
matrix.
Figure 48. 4-bit LUT1 or CNT/DLY2/FSM0
CNT/DLY2/
FSM0
OUT
CLK
DLY_In/CNT_Reset
4-bit LUT1
OUT
IN0
IN1
2-bit NVM
IN2
IN3
To Connection
Matrix Input <39>
From Connection Matrix Output <70>
reg <698:680>
reg <702:701>
From Connection
Matrix Output <67>
UP
KEEP
Clk Select
reg <698:695>
From Connection
Matrix Output <71>
From Connection Matrix Output <72>
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 ...