Debuchy will have little time to bed down given the Toon's dismal form.
"It has been a very difficult time for me over the last six months. But I have got here in the end and that's all that counts," he told the Sunday Sun.
"The Premier League is going to be a test in a sense for me because it's more physical than Ligue 1.
"The lads I already know at Newcastle have already told me about these demands.
"I will find all of this out for myself, but I've seen it from watching games on television, and I also know about the high quality of players in this league.
"I have watched a lot of the Premier League when back in France. So I know what to expect."