Contents
What are disadvantages of I2C?
What are the disadvantages?
- Conflicts – Due to chip addressing, there’s always a possibility of an address conflict.
- Slower speeds – I2C protocol uses pull-up resistors rather than the push-pull ones used by its peers.
- Requires more space – Now, as an embedded system engineer, you know how valuable PCB real estate is.
What are I2C errors?
I2C Bus Error Condition The bus error condition is a generic error that indicates a hardware issue. In this case, a bus error occurs when a START or STOP condition occurs at an illegal position in the format frame. Bus errors rarely occur.
Are there any problems with an I2C device?
I2C devices can also be constructed with a single transistor per line, because the two lines are pulled up by an external resistor (or resistors). This sounds good, but can cause problems with high-speed signals and high-capacitance lines. So let’s get down to details. The problem with relying on pullup resistors is “parasitic capacitance”.
Why do I2C devices have one transistor per line?
There is a price for this simplicity when interfacing systems that run at different voltages. I2C devices can also be constructed with a single transistor per line, because the two lines are pulled up by an external resistor (or resistors). This sounds good, but can cause problems with high-speed signals and high-capacitance lines.
How does an I2C sensor work in slave Arduino?
The I2C (a.k.a. TwoWire or Wire) is a bus. Many devices can be wired to the same pair of pins. They must listen on different addresses. So wire both devices to the D1, D2 and use in slave Arduino an address different then the address of the sensor.
What’s the low level voltage on the I2C bus?
Further diagnostics is possible with Vcc, SCL and SDA connected to an oscilloscope and/or an appropriate I2C monitor device: Are the high and low-level voltages on SDA and SCL correct during I2C transfers? The I2C standard defines the low-level threshold with 0.3 Vcc, the high-level threshold with 0.7 Vcc.