I2C Address Problem with Micromite


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robert.rozee
Guru

Joined: 31/12/2012
Location: New Zealand
Posts: 1987
Posted: 03:26pm 14 Jan 2022      

typing "i2c reserved addresses" (without quote marks) into google reveals:

"A seven bit wide address space theoretically allows 128 I2C addresses - however, some addresses are reserved for special purposes. Thus, only 112 addresses are available with the 7 bit address scheme. To get rid of this a special method for using 10 bit addresses is defined.

The following table shows I2C addresses reserved for special purposes:

0000000 0      General Call
0000000 1      Start Byte
0000001 X      CBUS Addresses
0000010 X      Reserved for Different Bus Formats
0000011 X      Reserved for future purposes
00001XX X      High-Speed Master Code
...
11110XX X      10-bit Slave Addressing
11111XX X      Reserved for future purposes"

from:
https://www.i2c-bus.org/addressing/


what exactly is the device you have that has address 0x78?


cheers,
rob   :-)
Edited 2022-01-15 01:37 by robert.rozee