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40MX and 42MX FPGA Families
1- 2
v6.0
The 42MX devices contain three types of logic modules:
combinatorial (C-modules), sequential (S-modules) and
decode
(D-modules).
Figure 1-2
illustrates
the
combinatorial logic module. The S-module, shown in
Figure 1-3, 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.
Figure 1-2 • 42MX C-Module Implementation
D00
D01
D10
D11
S0
S1
Y
A0
B0
A1
B1
Figure 1-3 • 42MX S-Module Implementation
CLR
Up to 7-Input Function Plus D-Type Flip-Flop with Clear
Up to 4-Input Function Plus Latch with Clear
D0
D1
S
Y
D
Q
GATE
CLR
OUT
Up to 8-Input Function (Same as C-Module)
D00
D01
D10
D11
S1
S0
Y
OUT
Up to 7-Input Function Plus Latch
D00
D01
D10
D11
S1
S0
Y
OUT
GATE
D
Q
D00
D01
D10
D11
S1
S0
Y
D
Q
OUT