2637 - ECP3: Can on-chip parallel termination to <!--[if gte mso 9]><xml>
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Description:An on-chip parallel termination to VTT can be used when implementing Generic DDR interface on LatticeECP3 device.
However, the same is not possible for DDR interfaces. External termination to VTT is required for DDR interfaces. All DQ and DQS pins must be terminated to VTT using an external termination resistor.