TSC2003: about start-up sequence

Hi ACGUY,

for this device VIH on I2C is VDD*0.7. So the Vi2c should be greater than 70% of VDD.

this section of the datasheet is stating that to ensure the device is powering on correctly and reliably, SDA, and SCL should be stable before VDD reaches 0.9V.

Regards,

Arthur

Hi Arthur,

In other words,
When VDD is 0.9V, I2C bus voltage needs 0.9V*0.7=0.63V.
Is this correct?

Regards,
ACGUY

I think it is more accurate to say

"I2C lines need to be powered up and stable before VDD =0.9V"

Regards,

Arthur

I am asking the concrete voltage value of I2C bus for "stable operation" when start-up VDD=0.9V.
It is not listed that voltage on datasheet, threfor I am asking on E2E.

I2C should be pulled up to Vcc.

Regards,
Arthur

In other wards,
"If the I2C_bus tied to VDD with pull-up resistor, This device can meet POWER-ON SEQUENCE TIMING requirements."
Is it correct?