Specifications

86 Intel

Atom™ processor CE4100 Ref# 420826

Platform Design Guide

Intel Confidential

7.3 I

S Audio Output Interface

This interface includes I2S0 interface (I2S0_BCK_OUT, I2S0_LRWS_OUT and

I2S0_SDATA_OUT) and I2S1 interface (I2S1_BCK_OUT, I2S1_LRWS_OUT and

I2S1_SDATA_OUT0~3).

Figure 7-2. I

S Audio Output Interconnects Topology

The Audio Output channels are designed to transfer the decoded audio samples between the

unified memory buffers and audio digital-to-analog converters with I

S interfaces. They take

data from the circular buffers in unified memory and convert the samples to serial bit

streams sent to the DACs. Port I2S0 supports Stereo or Mono mode only. Port I2S1 has four

pins i2s_sdata_out[3:0] to support up to 7.1 audio.

Table 7-2. I2S Audio Input Interconnects

Traces Layer Min Length

Max

Length

Trace:

Width/Spacing

Spacing from other

signals

W_TL1

CM Breakout

0.1” 0.5” 4 mils >=8 mils

W_TL2

Micro strip

0.5” 9” 4 mils >=8 mils

Notes:

• All trace impedance required to be 55 Ω +/- 10%.

• All signals prefer to reference to ground plane and routed over a continuous plane.

• Simulation data based on Cin = 10pF (no IBIS models).