A Pseudo-Random Noise code generator module is configured to generate PRN codes operating with different navigation standards for use with a GNSS receiver. The generator includes a number of linear shift registers including a respective number of feedback taps and a channel selection network including an output multiplexer. A first register includes a first number of taps and a second register includes a second number of taps. The first register and second register are associated with a respective feedback network to combine signals at the feedback taps to obtain a feedback signal that is selectably fed back through a selection circuit at an input of the respective register. A network can selectably concatenate the first register with the second register.