基于24C64的e2prom的子程序，单片机用的是freescale的hcs12dg128芯片，已经在实际产品中用过，能存储一年的数据-Based on 24C64' s e2prom the subroutine, microcontroller using a freescale the hcs12dg128 chips have been used in actual products that can store data