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.
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Figure 4.13 LCD circuit
4.9 RS232 Debugging Serial Port Circuit
The A6G2C core board provides eight UART interfaces, all of which have interrupt mode and DMA mode,
among which UART1 is an important communication port for downloading and debugging programs. It is
recommended to ensure that UART1_TXD and UART1_RXD are dedicated to UART1 function during design.
Figure 4.14 shows the RS-232 interface reference circuit. The SP3232 has an efficient charge pump. When
the operating voltage is 3.3 V, the 0.1μF capacitor is enough for operation. The charge pump allows the SP3232 to
send RS-232C compliant signals at a voltage within +3.3 V to +5.0 V. The ESD protection inside the SP3232
device allows the pins of the driver and receiver to withstand ±15kV human body discharge and IEC61000-4-2 air
gap discharge. The SP3232 device includes a low-power shutdown mode. The device's driver outputs and charge
pump are disabled in this mode. In shutdown, the supply current is less than 1 µA.