i2c

heiio everyone;
i hav some queries regarding i2c communication

1.what is the range an i2c communication travel without affecting the data

2.how many devices can we connect on i2c-i have read 127 addresses, can u explain me this?

3. what is the difference between i2c,rs232 and rs484

thank u all

Parents
  • 1. are you even aware of the purpose of i2c? signal degradation can occur because of many reasons, but the protocol was invented to couple ICs hence devices in relative proximity. i2c will function as long as the distance is less than 12 feet. note that decreasing the clocks frequency below 500 Hz can increase the range to about 100 meters, if the bus load is kept under control.

    2. the original i2c implementation had an address space of 7 bits, which was later extended to 10 bits.

    3. please read the specifications and compare.

Reply
  • 1. are you even aware of the purpose of i2c? signal degradation can occur because of many reasons, but the protocol was invented to couple ICs hence devices in relative proximity. i2c will function as long as the distance is less than 12 feet. note that decreasing the clocks frequency below 500 Hz can increase the range to about 100 meters, if the bus load is kept under control.

    2. the original i2c implementation had an address space of 7 bits, which was later extended to 10 bits.

    3. please read the specifications and compare.

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