Installation Instructions
Table Of Contents
- 1. Function Introduction
- 2. Performance Parameters
- 3. Pin Function
- 4. System Hardware Design
- 5. Antenna Selection
- 6. Mechanical Dimensions
- 7. Disclaimer
Contribution to Technology · ZLG Electronics
A6G2C Series Core Board
MiniARM Core Board
Product Data Manual
©2020 Guangzhou ZHIYUAN Electronics Co., Ltd.
39
Figure 4.16 Indicator circuit
Due to the limited space, the preceding chapters only briefly introduce the peripheral design of the
A6G2C core board. For detailed application, see the A6G2C Industrial Control Core Board Reference Circuit
Diagram.
4.12 PCB Design Precautions
The integrated industrial communication and multimedia functions of the A6G2C series core boards involve
many high-frequency and high-speed signals. While ensuring the functional design of the schematic diagram, a
good PCB design will greatly improve the stability and reliability of peripheral functions.
For high-frequency and high-speed signals, the characteristic impedance is a key parameter on the PCB. The
A6G2C series core board is recommended to use no less than four layers for the bottom PCB stack-up, which
usually consists of two signal layers, top and bottom, one power layer, one ground layer, and other insulating
materials. Traces and layers constitute impedance control, and the impedance value is determined by their
physical structure and the electrical properties of the insulating material: the width and thickness of the signal
traces, the height of the core or pre-fill material on both sides of the trace, the configuration of the trace and the
board, the insulation constant of the core and pre-fill material, etc.
Table 4.2 describes the common signal cable impedance control of the A6G2C core board.
Table 4.2 Main signal impedance control description of the core board
Signal type
Differential trace
or not
Impedance control size
Description
RMII fast Ethernet
No
Single ended 50 ohms
The PHY chip should be as close as possible to the RMII
signal pins of the core board
NET cable
Yes
Differential 100 ohms
——
EMMC/SD/TF card
No
Single ended 50 ohms
Parallel signal traces of equal length and 10K resistors
increased on the signal cables
USB HOST/OTG
Yes
Differential 90 ohm
——
CSI camera
No
Single ended 50 ohms
Parallel signal cables routed in equal length
Onboard antenna
No
Single ended 50 ohms
It needs to be calculated based on the actual RF signal
frequency, usually 50 ohms
LCD
No
No
Equal length processing of parallel signal cables
Red, 0603
Green, 0603
Red, 0603