MSP430F6736: I2C,VOH,VIH,VOL & VIL

Hi,

The VIT+ and VIT- in table 5-1 can be considered as VIH and VIL. 

The VOH and VOL is listed in table 5-4

Bet regards,

Cash Hao

Hi Cash hao,
     Thanks for your replay
      I have another doubt, if I consider VIH and VIL in as per table 5-1,max voltage is 2.1V but my slave operating @ 3.3VCC,if i exist 2.1V what happen, In this case i cannot use level shifter because VOH max is 3.3V.plase resolve this query.

Thanks you,
Darvin.R
       

Hi Darvin,

What do you mean by exist 2.1V? 

The 2.1V VIH means for input voltage, it is better to keep your input signal within the range from 2.1V to VDD, so the MCU can consider the input signal as High without issues. If you apply an exact 2.1V on an input pin, I would say the MCU can still consider this input signal as High for most cases. 

Since you are using I2C interface, it has external pull ups. The VIH VIL should not be an issue in I2C applications. 

Best regards,

Cash Hao

Hi Cash Hao,
    
    1. As per above the image  VIT+ max is 2.1V.
    2.In my condition VCC i am going to operate msp 430 and slave device at 3.3V,at that condition my VIH is 3.3V max.
    3.As per the datasheet VIT+ max 2.10.if exceeding 2.10V what happen? it will damage the pin or work fine?


Thanks and regards,
Darvin.R  

Hi Darvin,

2.1V is the threshold voltage for the MCU consider the input voltage is High or Low. You can defiantly input a voltage between 2.1V to VCC on the MCU pin.

Best regards,

Cash Hao