Acting as a bridge between processors, IDT stated that the new devices allow handset designers to minimize device complexity, through increased design flexibility resulting in faster time to market. Moreover, by adding in power plane isolation functionality, the devices allow for a reduction in total system power consumption.
The IDT 70P2X5 dual-ports are designed to work with application processors and baseband processors that make use of an address-data mux (ADM) interface. The ADM interface has a lower input/output (I/O) count than other approaches, such as the standard asynchronous dual-port RAMs commonly found in high-end mobile handsets. The IDT dual-ports use 50 percent fewer processor I/O pins, freeing those pins to support desired differentiating functionality. Moreover, the IDT dual-ports also deploy eight dynamically programmable I/Os that the processor can use to control and/or monitor other devices, enabling the handset designer to add even more differentiating functionality.
"The high-end handset consumer demands high-speed downloads, as well as top-quality playback. However, this speed and quality must be delivered without draining the battery," said Fred Zust, vice president and general manager of the IDT Communications division. "We identified the interface between the baseband and application processors as a major performance bottleneck and battery drain. It was clear that a new interconnect architecture was needed to solve this problem, so we designed these dual-ports in close co-operation with leading high-end handset manufacturers and with the pre-eminent processor component provider in this application space."
All the new IDT dual-port devices are currently sampling and are offered in a 100-pin fpBGA package.
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