The CRD4202-2 reference design eliminates the cost of the 24.567 MHz crystal by operating the CS4202 in Phase Locked Loop (PLL) mode. This reference design also features six channel analog audio outputs, an optical S/PDIF digital output, and Communication and Networking Riser (CNR) interface. This design uses the CS4202 audio codec which has several advanced features including a built-in headphone amplifier, simultaneous six channel analog and S/PDIF optical digital output, GPIO for headphone detection, and up to 30 dB of internal microphone boost.