Two-Wire Serial Interface Smart Temperature Sensor TCN75 And 89C51 MCU Interface Circuit

Published:2011/5/18 6:49:00 Author:Robert | Keyword: Two-Wire, Serial, Interface, Smart, Temperature Sensor, MCU | From:SeekIC

The interface circuit of TCN75 and 89C51 is shown in the picture below. Byletting the TCN75's address input ports A2~A0 all connect to high voltage level UDD, the address code is changed to be 111. The 89C51 can achieve the chip-selection function by software. The 89C51's series data receiving port (RXD) and series data transmitting port (TXD) are connected to the TCN75's SDA port and SCL port separately. TCN75's interrupt/compare signal is connected to 89C51's interrupt port INT0.



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