Specifications

L506 Hardware Design

3.6.2 PCM interface application

L506 only support the host mode, PCM_SYNC,PCM_CLK is the output pin，PCM_SYN as the

synchronizing output 8kHz sync signal. PCM Data support 8bit or 16bit data.

L506

（ DCE（

CODEC

PCM_IN

PCM_SYNC

PCM_OUT

PCM_CLK

GND

PCM_DIN

PCM_DOUT

PCM_SYNC

PCM_CLK

Figure 3-10 PCM application circuit（L506 in host mode）

Note:1.L506 PCM port DC character is base on 1.8 voltage, please pay attention the voltage

matching.

2. If your design need this function, you should add the crystal for PCM clock. About the

crystal type please contact our market.

3. L506 default design base on NAU8814 as the codec chip, the detail design please refer to

《

L506 reference design

》

3.7 USB2.0 interface

3.7.1 USB interface pin definition

L506 integrated a USB 2.0 port and low speed mode full speed mode and high speed mode

transmission speed between the AP and the host. Below table is the module USB pin definition

Table 3-13 USB interface pin definition

Pin No.

Signal name

I/O type

DC characteristic（V）

Min.

Typ.

Max.

USB_DM

USB2.0 dateD-

USB_DP

USB2.0data D+

3.7.2 USB Interface application

USB bus is mainly used for data transmission, software upgrading, module testing. Work in the

high-speed mode of the USB line, if you need ESD design, ESD protection device must meet the