外文资料翻译---利用多重单片集成电路的液位监测仪(编辑修改稿)

外文资料翻译---利用多重单片集成电路的液位监测仪(编辑修改稿)内容摘要：

rdware architecture and division of labor: The hardware design is divided the following several parts: Monolithic integrated circuit。 A/D conversion fraction。 Control signal output unit。 The nonvolatile storage (makes the RAM expansion)。 Presses a key the part。 Demonstrates the part。 Prints the I/O port part。 Analog switch part. The monolithic integrated circuit selects 89C52, its characteristic is internal includes 8KB ROM, does not need outside the piece to expand ROM。 A/D switch selects MC14433, its characteristic is the conversion accuracy is high, antijamming ability, each second may transform about 20 times, because the fluid position change is not very quick, therefore may satisfy the monitor fluid position change the need。 The control signal output uses the monolithic integrated circuit to control the 74LS373 latch39。 s way, This may fluctuate the control output port quantity through the fluctuation latch integer way。 Because each group request can roll demonstrates in 1 year each class, every day, each month39。 s input output total quantity (on 1st 3 classes), normal or the accident power cut data does not lose, therefore has used AT29LV040A (512KB) dodges the fast memory (also to be possible to use FRAM). 3 Because 89C52 are most may outside expand 64KB RAM, to guarantee that has the enough storage space to be possible AT29LV040A A16, A17 and a18 address wire and the 1 monolithic integrated circuit39。 s some port connection, like this through controls these 3 address wires the change to be possible to achieve uses AT29LV040The 512KB space goal. Presses a key the part to use conventional the noncode keyboard way then. In order to enhance the manmachine interactive ability, de。