The forth chapter introduces the mainboard's hardware design of tax controlled receiver. The mainboard contains common facility, such as CPU, LCD drive, FLASH, serial interface , and so on.
第四章详细介绍了税控收款机主板的硬件设计，主板包括CPU、LCD液晶驱动、FLASH、串口等常用的外设。
A text file is a sequence of characters stored on a permanent medium like a hard drive, flash memory, or CD-ROM.
文本文件就是一系列的字符串，存储在一个永久介质中，比如硬盘、闪存或者光盘之类的东西里面。
A text file is a sequence of characters stored on a permanent medium like a hard drive, flash memory, or CD-ROM.
文本文件就是一系列的字符串，存储在一个永久介质中，比如硬盘、闪存或者光盘之类的东西里面。
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