40MX and 42MX FPGA Families
The 42MX devices contain three types of logic modules:
combinatorial (C-modules), sequential (S-modules) and
decode
(D-modules).
illustrates
the
combinatorial logic module. The S-module, shown in
implements the same combinatorial logic
function as the C-module while adding a sequential
element. The sequential element can be configured as
either a D-flip-flop or a transparent latch. The S-module
register can be bypassed so that it implements purely
combinatorial logic.
A0
B0
D00
D01
D10
D11
S1
A1
B1
Y
S0
Figure 1-2 •
42MX C-Module Implementation
D00
D01
D10
D11
S1
S0
Y
D
CLR
Q
OUT
D00
D01
D10
D11
S1
S0
Y
D
GATE
Q
OUT
Up to 7-Input Function Plus D-Type Flip-Flop with Clear
Up to 7-Input Function Plus Latch
D00
D0
Y
D1
S
D
GATE
CLR
Q
OUT
D01
D10
D11
S1
S0
Y
OUT
Up to 4-Input Function Plus Latch with Clear
Up to 8-Input Function (Same as C-Module)
Figure 1-3 •
42MX S-Module Implementation
1 -2
v6.0
ACTEL [ Actel Corporation ]
