def_pin.h

W78E516实现高速公路收费站语音费额显示器资料之三:产品的语音,通讯,显示全套源代码程序.

/**********************51引脚定义************************/
//看门狗
sbit wdi=P1^5;

//外部ROM
sbit rom_wr=P3^6;
sbit rom_rd=P3^7;
sbit rom_ce=P1^2;
sbit rom_a17=P1^1;
sbit rom_a16=P1^0;

//与CPU2相连
sbit pin_wrram=P1^7;
sbit pin_full=P1^6;

//外部RAM
sbit ram_wr=P3^6;
sbit ram_rd=P3^7;
sbit ram_ce=P3^5;

//语音芯片ISD25xx引脚定义
sbit isd_ce = P3^3;
sbit isd_a9 = P1^1;
sbit isd_a8 = P1^0;