tk25平台默认的是128Mbit flash memory 和 32Mbit SRAM，因为1BYTE等于8BIT，所以就是我们通常所说的是16M ROM和4M RAM，不过由于文件系统占用2M，这2M一般又被分为系统盘和用户盘，系统盘存储NV文件和MMS相关文件，对用户不可见，-tk25 platform, the default is 128Mbit flash memory and 32Mbit SRAM, because the 1BYTE equal 8BIT, so that we usually are talking about 16M ROM and 4M RAM, but because the file system occupied by 2M, which generally has been divided into 2M system disk and user disk , the system disk storage NV files and MMS related documents, the user is not visible,