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Hi , I have problems with interfacing DS1820 to LPC2368. i can see only "127" on display. Thnks.
what is maximum frequency you want to use?
Well, that depends of a lot of things:
Which frequency you are using to clock the code? What is the language you will use in the project when you worked? Assembler ?, C ? Basic? Who long is the code inside the interrupt?
Did you post in the wrong thread?
You can't choose the communication frequency for the DS1820. You can choose how long to pause between each bit (infinity is ok as long as the device stays powered), but the bit timing for the communication is dictated by the datasheet. It isn't like I2C where you configure a baudrate, and then clock the data synchronously.
i use c language.
Here are the frequencies :
/* Clock Definitions */ #define Fosc 12000000 /* System frequence,should be less than 80MHz. */ #define Fcclk 57600000 #define Fcco 288000000
i testes several pauses , but at all of them there is no different result.