本文详细分析了COOLRUNNER系列CPLD的结构,特点及功能,使用VHDL语言实现数字逻辑,实现了水下冲击波记录仪电路的数字电路部分.-In this paper, a detailed analysis of the CoolRunner CPLD series structure, characteristics and functions, the use of VHDL language digital logic, the realization of the underwater