LFEC3E-3QN208I Lattice, LFEC3E-3QN208I Datasheet - Page 365

• Manufacturer Part Number: LFEC3E-3QN208I
• Description: IC FPGA 3KLUTS 208PQFP
• Manufacturer: Lattice
• Series: EC3r

Specifications of LFEC3E-3QN208I

• Number Of Logic Elements/cells: 3100
• Number Of Labs/clbs: -
• Total Ram Bits: 56320
• Number Of I /o: 145
• Number Of Gates: -
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 208-BFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q6377645

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Lattice Semiconductor
LatticeECP-DSP sysDSP Usage Guide
MAC Module
The MAC Module configures multiply accumulate elements to be packed into the primitives. The Basic mode,
shown in Figure 15-4, consists of one clock (optional), one clock enable and one reset tied to all registers. Because
of the Accumulator, the output register is automatically enabled. The SRI and SRO ports can only be enabled if
inputs are less than 18 bits. The Accumsload loads the accumulator with the value from the multiplier. This is
required to initialize and load the first value of the accumulation. The Advanced mode, shown in Figure 15-5, allows
finer control over the registers. In the Advanced mode you can control each register with independent clocks, clock
enables and resets.
Figure 15-4. MAC Mode Basic Set-up
Figure 15-5. MAC Mode Advanced Set-up
15-4