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UART1-4-PCB-SCH-PROTEL99-VK3214
- 串口一转四的模块，包括了原理图和PCB版图。另外还有主要芯片VK3214的资料和通信协议的介绍-Serial 1 turn four modules, including schematic and PCB layout. There is also the main chip VK3214 information and communication protocols introduced
VK3214_CP2102
- 一个是串口扩展的芯片的资料，支持1到4扩展；另一个是USB到RS232转换的芯片的资料。-One is the expansion of the chip serial data to support the expansion of 1-4 the other is the USB to RS232 converter chip information.
VK3214
- windows ce 平台上扩展串口驱动，使用芯片vk3214，同vk3222程序可相互移植。串口扩串口可用于低速领域，高速就需要用spi2serial或i2cToserial-windows ce platform expansion serial driver, use the chips vk3214, with vk3222 procedures and Transplantation. Expansion of low-speed serial port can be used in
vk3214_interface
- vk3214接口原理图,包括：RS232接口及与单片机接口-vk3214 interface circuit
four-serial-port-expansion
- 基于Atmega128微处理器，VK3214串口扩展芯片，RS232方式实现一转四串口扩展-Four serial port expansion to achieve a turn-based Atmega128 microprocessor, VK3214 serial port expansion chip, RS232 mode