中文摘要：

应答器（Balise）和地面电子单元（LEU）是CTCS2级和以上各级列控系统中的重要组成部分。介绍应答器编程和测试工具的报文存储部分。重点介绍大容量存储器AT45DB642D的软硬件设计，实现应答器报文的写入和读取功能。

英文摘要：

Balise and Line side Electronic Unit（LEU） were the important components of CTCS level 2 to level 4. The balise telegram storage part of balise programming and testing device was described in this paper, foucsing on the design of hardware and software of large capacity memory AT45DB642D, to implement writing and reading of the balise telegram.