User Manual

EP7309/11/12 User’s Manual - DS508UM4 16-1
Copyright Cirrus Logic, Inc. 2003
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16
Chapter 16
16DAI/CODEC/SSI2
Introduction
The second channel is connected to a MUX which selects amongst the COD EC, DAI,
and SSI2 interfaces. Th e CODEC interface is intended for use with telephony-style
CODECS. High quality ADCs, DACs, or CODECs such as the Cirrus Logic
CS53L32A, CS43L42, and CS42L50 are easily added to an EP7309 or EP7312 design
via the DAI I2S standard interface. The SSI2 port provides an additional SPI port with
Master/Slave interface control. The EP7311 does not include the features described
in this chapter.
Features
• High quality DAI I2S standard ADC and DAC interface (DAI)
• Selectable 8-48 kHz sample rate
• Selectable 128 or 64-bit frame size
• Maximum 16 bit sample size
• 90.3168 M Hz on-chip PLL or external 11.2896 MHz clock source
• DAI subset of the I2S form at used by many manufacturers
• 12-deep receive FIFO
• 8-deep transmit FIFO
•
MCLK 256x oversam ple clock
• General purpose SPI/Microwire1-compatible mas ter/slave mode interface
(SSI2)
• Separate 16-deep half word wide T X and R X FIFOs
• Interrupt at half-empty/half-full
• Separate f rame sync sign als for asym metric traffic
• 512 kHz maximum clock
• CODEC interface for telephony CODECs
• MUXselectsDAI,CODEC,orSSI2foruse