The lawsuit is part of an ongoing legal battle between the two companies.

However, Qualcomm alleges that Apple tried to share the confidential information with Intel, which now supplies a baseband modem found in iPhones.

Qualcomm has done a lot of things to squeeze Apple into giving in to its demands, from asking the Federal Trade Commission to ban all sales of iPhones in the making the Chinese market inhospitable for the Cupertino firm.

In its complaint, Qualcomm alleged that Apple was required under its contract to ensure that Apple engineers working with Qualcomm did not communicate details about Qualcomm chips to Apple engineers working on competing chips from Intel.

Qualcomm filed another lawsuit against Apple on Wednesday accusing the company of breaching the terms of its software license and using its unprecedented access to that code to help Intel, reports Bloomberg.

The contract Apple allegedly broke surrounds software created to make Qualcomm chips work with other iPhone components, Bloomberg first reported.

Apple declined to comment on the suit.

Qualcomm claim that Apple hasn't protected their software sufficiently, which they legally agreed to, and say Apple aren't allowing for a proper audit to review how the iPhone handles their software.

Shah said that these statements were "materially false", "misleading" and "failed to disclose adverse facts pertaining to Qualcomm's business, operational and financial results, which were known to [Qualcomm] or recklessly disregarded by them". Apple requested that its contract manufacturers withhold royalties to Qualcomm until the dispute is resolved.

However, Apple has now cut off those payments, costing Qualcomm an estimated $2 billion a year in revenue.