User's Manual

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1）The audio output signals, a pair of difference signal, export to two receivers. And they are not the real traditional
dimensional sound.
2）It is recommended to use the smoothing capacitor or smoothing circuit for reducing the
undesired signal between
different frequency bands. Just like what is shown in figure 2-9.
3）For avoiding the electro-static, it is recommended to use the ESD element. Just like the voltage dependent resistors
RV501, RV502 and RV503 in figure 2-10.
4）Designers needs gets up the acoustic train signaling analogous circuit ground terminal and the entire digital circuit
earth end connection, bead or 0 ohm resistance can be used.
5）In the chart J501 is a four section of earphone jack schematic diagram electric circuit, you can see audio output
signal connecting difference signal while audio input signal connecting one negative signal.
2.2.6 PCM interface and IIC interface*
U6300 offers Micro the PCM interface and the SPI interface by Mini PCIe Interface. And the SPI interface is simulated
by GPIO PIN.
2.2.6.1 PCM interface description
The information about PCM interface offered by U6300 is described in table 2.10 below.
Table 2.10 U6300 PCM interface description
Signals offered
by PCM
The name of the correlative pins in
Mini PCIe Interface
SN. of the Mini
PCIe Interface
Description
SYNC PCM_SYNC 51 PCM Synchronous Signal
CLK PCM_CLK 45 PCM CLK
D ATA_IN PCM_DIN 47 PCM Input
D ATA_OUT PCM_DOUT 49 PCM Output
2.2.6.2 IIC interface description
U6300 offers the IIC interface for user. Two operating modes with different transfer rates, Standard-mode: up to
~100 kbps
, Fast-mode: up to ~400 kbps.The detail information is given in table 2.11 below.
Table 2.11 U6300 IIC interface description