Both boards are designed for easy integration of digital and analogue audio into the target application. Key features include interfaces for digital audio via USB Mini-B or the Apple iOS interface, line-in and microphone-in for convenient connectivity to analogue audio sources such as microphones or instrument pickups, and line-out and headphone out, for line-level output and headphone connectivity. Each provides an excellent starting point for a portable music player dock design. Additionally, these features allow the mixing of digital and analog audio, utilising the power of the PIC32's advanced processing capabilities. The development boards are suitable for applications in the consumer and automotive markets, such as consumer audio docks (including those in stereo systems), noise-cancelling headsets, clock radios or A/V entertainment system sounds bars, as well as in automobiles that offer portable music player docking capabilities.
These two new boards demonstrate Microchip's commitment to making digital audio development easy with the PIC32 MX1 and MX2 microcontrollers. They feature 66 DMIPS of performance, up to 128 KB Flash, 32 KB of RAM, USB, I2S interfaces and an advanced clocking scheme that provides the signals needed for the external CODEC while eliminating the need for a CODEC with a built-in PLL. In addition, this series of MCUs offers an 8-bit Parallel Master Port (perfect for interface to an LCD), Microchip's mTouch™ capacitive touch technology support and numerous other general-purpose features.
To maximise the cost-effectiveness of designs that need to decode MP3 files, Microchip is also releasing a Compact MP3 Decode Library. This new code requires only 21 KB of RAM and can run on the PIC32MX250F128. Utilising these new boards and the available Compact MP3 Decode Library, designers can reduce development time and shorten their time to market.
"We have seen excellent traction for the PIC32 in audio applications,"
Development support: Developers can begin designing today with these boards, using the Microchip's MPLAB® X Integrated Development Environment. Both development boards can be programmed and debugged by the PICkit™3 (part # PG164130), which is available separately.
Packaging and availability: