User's Manual
Table Of Contents
- 1 Document information
- 2 Hardware design block diagram
- 3 Power Consumption
- 4 Hardware capabilities
- 5 Connector datasheet
- 6 PCB production information
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4.7 Audio Circuits
The board is equipped with an audio decoder chip, ES8323(24-bit DAC,8 to 96 kHz sampling
frequency), which is used to output audio signals. The ES8323 communicates with the RK3288
via I2S and I2C, HPOL and HPOR is the left and right audio signals of the output.
Figure 22 Audio Circuit
4.8 Ethernet
The RTL8211E-VB-CG is a network transceiver PHY chip that uses an RGMII interface and uses
four twisted pair channels for 1000Mbps transmission.
The Gigabit Ethernet physical layer connection path:
RJ45 interface (built-in network isolation transformer)- > network PHY chip - >
RK3288(MAC).
Figure 23 Ethernet Interface Circuit