Microsemi SmartFusion2 - 2 Core Parameters

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2 – Core Parameters
Table 2-1 lists the Normal mode Hard Multiplier Accumulator settings; Table 2-2 lists the Dot Product
mode settings.
Table 2-1 • Hard Multiplier Accumulator Normal Mode Configuration Description
Name Valid Range Description
Multiplier Functions
Function Multiplier
Accumulator
(Adder)
Multiplier
Accumulator
(Subtractor)
Multiplier
Accumulator
(Adder/Subtractor)
The Multiplier Accumulator with Adder/Subtractor exposes the SUB
control signal, which enables you to dynamically toggle between an
add or subtract operation.
Input Port A0
Use Constant Sets input port A0 to constant
Constant Value (Hex) -2
17
to (2
17
- 1) Two's complement value of A0, if A0 is constant. Values shorter than
18 bits are padded with zeros. Negative values must be a full 18 bits
wide. For example, 0x1FFFF means +131071 (2
17
- 1), while 0x3FFFF
means -1
Width 2 to 18 Width of input port A0; if shorter than 18 bits it is sign-extended. For
example, if the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1
Register Port Registers input port A0 (if A0 is not set to constant)
Input Port B0
Width 2 to 18 Width of input port B0; if shorter than 18 bits it is sign-extended. For
example, if the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1.
Register Port Registers input port B0
Input Port C
Use Constant Sets input port C to constant
Constant Value (Hex) -2
43
to (2
43
- 1) Two's complement value of C, if C is constant. Values shorter than 44
bits are padded with zeros. Negative values must be a full 44 bits wide.
Width 2 to 44 Width of input port C; if shorter than 44 bits it is sign-extended. For
example, If the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1.
Carry In Carry in for C (if C is not set to constant)