2.3.4 RS Latch

The RS latch has basically the same functions as an SR latch, except in the Forbidden state where both S and R equal ‘1’. In this state, an SR latch output will become ‘1’, but on the RS the output will be ‘0’.

The S-input is driven by the even LUT output (LUT0), and the R-input is driven by the odd LUT output (LUT1).

Figure 2-22. RS Latch
Table 2-15. RS Latch Behavior
SROUT
00Hold state (no change)
01Clear
10Set
11Forbidden