Question Regarding I2C Address

Bill_Sev · Post by **Bill_Sev** » Mon Apr 12, 2004 6:40 pm

If the display is preset to 50h. Is it necessary to set the I2C address thru the microcontroller or can I select it as follows?

MainSend:
mov A,#LCDW ; set slave address (8

Miles · Post by **Miles** » Tue Apr 13, 2004 10:20 am

Hello...

The display's I2C default address is 50h, however this can be changed up to 16 or 127 different addresses, depending upon the unit you have. The only way a "slave" device will accept communication is if it's accessed by it's identity, the address.

Bill_Sev · Post by **Bill_Sev** » Tue Apr 13, 2004 11:25 am

Miles I understand that......

I was wondering if it had to be accessed via 0FEh 50H or can I just use 50h alone when selecting the slave?

Miles · Post by **Miles** » Tue Apr 13, 2004 11:43 am

You can define the address by simply using 0x50.