SLG46170 datasheet(45/87 Pages) DIALOG

45 / 87 page

000-0046170-103

Page 44 of 86

SLG46170

11.0 Digital Storage Elements (DFFs/Latches)

There are six D Flip Flop / Latches (DFF/Latch logic cells within the SLG46170 available for design. 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. DFF0 has the option to connect both the Q and Q Bar outputs to the connection matrix, DFF1, DFF2,

DFF3, DFF5 and DFF6 can only connect the Q output to the matrix. The macrocells DFF0, DFF1, DFF2 and DFF3 have an

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

Note that one of the Combination Function Macrocells (LUT 2_0 / DFF4) can also operate as a DFF or a 2-bit LUT please see

Section 10.1 2-Bit LUT or D Flip Flop Macrocells for the description of this Combination Function 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

if CLK = 1, then Q will not change

Figure 11. DFF/Latch0

DFF/Latch0

reg <693>

From Connection Matrix Output <20>

To Connection Matrix Input <19>

From Connection Matrix Output <19>

To Connection Matrix Input <18>

nRSTZ

nSETZ

From Connection Matrix Output <21>

reg <694>

reg <695>

Initial Polarity Select

DFF or Latch Select

SLG46170 Datasheet(PDF) 45 Page - Dialog Semiconductor