CH451是键盘显示芯片，需要处理器写控制字和读取数据，此程序即是CH451的内部接收发送初始化处理，具体可以参考说明-CH451 is the keyboard display chip, need to control the word processor to write and read data, this procedure is CH451 internal receiver sends initialization process, specific instructions c

LCD5110驱动程序，5110的字库存放在外部EEPROM中，所以此程序中会有一段数据缓冲区，用来存放从外部存储器读取的数据-LCD5110 driver, 5110 word stock in external EEPROM, so the program will have a data buffer, used to store the data read from external storage