DESCRIPTION

The WM8804 is a high performance consumer mode S/PDIF transceiver with support for 1 received channel and 1 transmitted channel.

A crystal derived, or externally provided high quality master clock is used to allow low jitter recovery of S/PDIF supplied master clocks.

Generation of all typically used audio clocks is possible using the high performance internal PLL. A dedicated CLKOUT pin provides a high drive clock output.

A pass through option is provided which allows the device simply to be used to clean up (de-jitter) the received digital audio signals.

The device may be used under software control or stand alone hardware control modes. In software control mode, both 2-wire with read back and 3-wire interface modes are supported.

FEATURES

• S/PDIF (IEC60958-3) compliant.

• Advanced jitter attenuating PLL with low intrinsic period

jitter of 50 ps RMS.

• S/PDIF recovered clock using PLL, or stand alone crystal

derived clock generation.

• Supports 10 – 27MHz crystal clock frequencies.

• 2-wire / 3-Wire serial or hardware control interface.

• Programmable audio data interface modes:

- I2S, Left, Right Justified or DSP

- 16/20/24 bit word lengths

• 1 channel receiver input and 1 channel transmit output.

• Auto frequency detection / synchronisation.

• Selectable output status data bits.

• Up to 3 configurable GPO pins.

• De-emphasis flag output.

• Non-audio detection including DOLBYTM and DTSTM.

• Channel status changed flag.

• Configurable clock distribution with selectable output

MCLK rate of 512fs, 256fs, 128fs and 64fs.

• 2.7 to 3.6V digital and PLL supply voltages.

• 20-lead SSOP package.

APPLICATIONS

• AV processors and Hi-Fi systems

• Music industry applications

• DVD-P/DVD-RW

• Digital TV