SLG46121V datasheet(39/98 Pages) DIALOG

39 / 98 page

000-0046121--106

Page 38 of 97

SLG46121

10.0 Combination Function Macrocells

The SLG46121 has twelve combination function macrocells that can serve more than one logic or timing function. In elven of

these cases, they can serve as a Look Up Table (LUT), or as another logic or timing function. In the last case, it can serve as

either a programmable delay or deglitch filter. See the list below for the functions that can be implemented in these macrocells.

•

Four macrocells that can serve as either 2-bit LUTs or as D Flip Flops

•

Four macrocells that can serve as either 3-bit LUTs or as D Flip Flops

•

One macrocell that can serve as either 3-bit LUT or as Pipe Delay

•

Two macrocells that can serve as either 4-bit LUTs or as 8-Bit Counter / Delays

•

One macrocell that can serve as either a Programmable Delay or as a Deglitch Filter

Inputs/Outputs for the eleven combination function macrocells are configured from the connection matrix with specific logic

functions being defined by the state of NVM bits.

When used as a LUT to implement combinatorial logic functions, 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).

When used as a D Flip Flop / Latch, the source and destination of the inputs and outputs for the DFF/Latches are configured from

the connection matrix. All DFF/Latch macrocells have user selection for initial state, and all have the option to connect both the

Q and Q Bar outputs to the connection matrix. The macrocells DFF4, DFF5, DFF6 and DFF7 have an additional input from the

matrix that can serve as a nSet or nReset function to the macrocell.

The operation of the D Flip-Flop and Latch will follow the functional descriptions below:

DFF: CLK is rising edge triggered, then Q = D; otherwise Q will not change

Latch: if CLK = 0, then Q = D

10.1 2-Bit LUT or D Flip Flop Macrocells

There are four macrocells that can serve as either 2-bit LUTs or as D Flip Flops. When used to implement LUT functions, the 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. When used to implement D Flip Flop function, the two input signals from the connection matrix go to the data (d) and clock

(clk) inputs for the Flip Flop, with the output going back to the connection matrix.

SLG46121V 데이터시트(PDF) 39 Page - Dialog Semiconductor