Convolutional Encoder Evaluation Configurations avaiable for ORCA4 FPGAs and FPSCs1
| Config # |
ORCA4
PFUs2 |
LUTs |
Registers |
External I/Os |
SysMem EBRs |
fMAX (MHz) |
Latency3 |
| conv_enco_o4_1_001.lpc |
4 |
6 |
16 |
7 |
N/A |
342 |
3 |
1 Performance and utilization characteristics using ispLEVER software and targeting the OR4E02, package BA352, speed 2.
2 Programmable Function Unit (PFU) is a standard logic block of Lattice FPGA devices. For more information, check the data sheet of the device.
3 The latency values are for din to dout with din_valid is high whenever rfi is high. The din to dout latency relationship can be explained as follows. For non-punctured encoders, the latency value is 3 when constraint length is greater than 4, otherwise the value is 2. For punctured encoders, the latency value is (output rate + 6) when constraint length is greater than 4, otherwise the value is (output rate + 4).
Convolutional Encoder Evaluation Configurations avaiable for ispXPGA1
| Configuration |
XPGA
PFUs2 |
LUT-4s |
Registers |
External I/Os |
SysMem EBRs |
fMAX (MHz) |
Latency3 |
| conv_enco_xp_1_001.lpc |
6 |
6 |
22 |
7 |
N/A |
510 |
3 |
1 Performance and utilization characteristics using ispLEVER software and targeting the LFX1200B, package FE680, speed 4.
2 Programmable Function Unit (PFU) is a standard logic block of Lattice FPGA devices. For more information, check the data sheet of the device.
3 The latency values are for din to dout with din_valid is high whenever rfi is high. The din to dout latency relationship can be explained as follows: For Non-punctured encoders, the latency value is 3 when Constraint Length is greater than 4 or else the value is 2. For punctured encoders, the latency value is (Output Rate + 6) when Constraint Length is greater than 4 or else the value is (Output Rate + 4).