本程序用于测试实时时钟模块SD2000的SRAM存储器D/E系列， 程序功能如下： 1. 关闭/INT1及/INT2的中断输出 2. 初始化时间(写时间数据) 3. 在BREAKPOINT1设断点时,依次读时间-写SRAM数据-读SRAM数据循环 4. 全速执行时,LED四位分别显示小时和分钟的值-procedures used to test the real-time clock module SD2000 SRAM memory D / E Series, procedures following functions : 1. Closed / INT1 and / INT2 the interruption of output 2. Initialization time (the time to write data) 3. Located in BREAKPOINT1 breakpoint, followed by time for-write SRAM data-reading cycle of four data SRAM. full speed of implementation, respectively, four LED display hours and minutes values