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I2C High speed Adapter ( 1MHz and above)

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ashwin.rao@maximintegrate

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Hi ,

I am looking for i2c master adapter which supports 1Mhz speed or above with no clock stretching and no delay between inter bytes or inter bits ?

i checked with Total Phase and their adapter doesn't support more than 800kHz.
 

Tantalos is correct on this. Originally a low speed bus used for data transfer in consumer electronics. USB is a faster variant but protocols may not suit your requirements.
 

Hi,

Seems you can do super hi speed I2C according to this, however doubt you will want to pay that price ..
https://www.telos.de/traciixl20/

Also begs the question as to what device you want to connect the master to and if they can handle that speed ?

What about distance, on or off board ?

Any reason you could not use SPI or USB ?
 

There is no problem to make it works even for 10Mhz, if both devices support this speed and fall/rise times is small enought. The maximum I2c speed specified by formula t=r*c, where r - pullup resistance and c - line capacity. You can use 100 Ohm pullup resistors, if your devices output logic allow this and the 1Mhz speed will not be a problem.
I tryied to run i2c for 800Khz clock with 1.5k pullup whith MPU6050 accelerometer. It works.
 

hello,


New EEPROM 24FC1026 are designed for I2C 1MHz !
but MCU must follow...
 

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