以AT89C52 單片機(jī)為核心，直接利用P0 口進(jìn)行了鍵盤擴(kuò)展，利用高靈敏度的壓力傳感器進(jìn)行信號(hào)提取，利用高速、高靈敏度串行A/D 芯片CS5511，配有液晶圖形屏顯示和微型漢字打印機(jī)。具有標(biāo)定、校零數(shù)據(jù)保存、打印購物清單、超重報(bào)警等功能。
關(guān)鍵詞：電子稱; AT89C52; LCD; CS5511; 微型打印機(jī)
Abstract: AT89c52 is the kernel in the system. The keyboard of the design is extended by p0 port. We get the signal from the sensitive pressure sensor and amplify it. The A/D transformer is cs5511. The dot matrix LCD module is used as the monitor. The smart CH character printer could output purchase lists. The system has achieved all the basic and the improved demands. In addition we improved its function base on above such as system demarcate, zero rectify and so on. Moreover, the data is stored in flash memory. In this way the design can avoid losing data when the electricity is cut off suddenly.
Key words: Electron balance; AT8952; LCE; CS5511; Mini-Printer