皮皮学，免费搜题
登录
搜题
【单选题】
CC2530与LCD1602通过四根数据线连接时,读忙子程序如下: uchar lcd_1602_busy() { uchar busy_state; P1DIR&=0XF0;//P0地4位置输入功能,准备读 rs=0; delay_nus(16); rw=1; delay_nus(16);e=1; delay_nus(16); busy_state=P1&0x0f; delay_nus(16);//等待数据稳定 e=0; delay_nus(16); busy_state=busy_state<<4;//扩充为8位数据 e=1;delay_nus(16); busy_state+=P1&0x0f; delay_nus(16);//等待数据稳定 e=0;delay_nus(16); return busy_state; } 请问:先读入的四位数据是( )A.
高半字节
B.
低半字节
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】New inventions make old ones ____obsolete____. For instance, because of the compact disk, the phonograph record is now outdated. ____
【单选题】The area of a de Laval Nozzle is directly proportional to the ratio v/V, where v is the flow velocity and V is the specific volume.
A.
True
B.
False
【简答题】电子商务的服务功能有哪些?
【简答题】Which quantity does the area of velocity-time graph represent?
【简答题】电子商务的服务功能有哪些？
【简答题】电子商务的服务功能有哪些?
【简答题】Write the synonym of the italicized word in the space provided New inventions make old ones obsolete. For instance, because of the compact disk, the phonograph record is now outdated. _______________.
【单选题】Industrial leaders are Worried lest new inventions make their plants unprofitable to operate they therefore wish to protect themselves against possible ______.
A.
depreciation
B.
obsolescence
C.
casualties
D.
bankruptcies
相关题目：
参考解析：
知识点：
题目纠错 0
发布
