Flashcards for:
I2C通讯介绍

I2C uses two lines: a clock line (SCL) and a data line (SDA). It operates in a master-slave configuration where the master (usually a microcontroller) controls the clock line.

During a stop condition, the data line (SDA) transitions from low to high while the clock line (SCL) remains high.

Devices on an I2C bus are identified by a unique 7-bit address. This allows for up to 128 distinct addresses or devices on the same bus.

1. Send the start condition. 2. Send the device address with the write bit (0). 3. Wait for acknowledgment. 4. Send the register address. 5. Send a restart condition. 6. Send the device address with the read bit (1). 7. Read the data from the slave. 8. Send acknowledgment if more data is needed or a non-acknowledgment to end. 9. Send the stop condition.

1. Send the start condition. 2. Send the device address with the write bit (0). 3. Wait for acknowledgment from the slave. 4. Send the register address. 5. Send the data to be written. 6. Wait for acknowledgment. 7. Send the stop condition.

The clock line (SCL) synchronizes the data transfer between the master and slave devices, ensuring that data bits are transmitted at the correct times.

The start condition indicates the beginning of a data transfer. It occurs when the data line (SDA) transitions from high to low while the clock line (SCL) is high.

An acknowledgment signal is sent by the receiving device (slave) to indicate successful receipt of data. A low signal (0) indicates acknowledgment, while a high signal (1) indicates no acknowledgment.

I2C stands for Inter-Integrated Circuit, and it is used for communication between integrated circuits or chips within a system.

The data line (SDA) must remain stable to ensure accurate data transmission. Changes during the high clock period could lead to errors in interpreting data bits.

During I2C communication, data on the data line (SDA) must remain stable while the clock line (SCL) is high. Changes to the data line should occur when the clock line is low.

Bus communication allows multiple devices to communicate over a shared connection, simplifying the wiring and increasing scalability.

In the idle state, both the data line (SDA) and the clock line (SCL) are held high (at high voltage).

The master signals the end of a data transfer with a stop condition, where the data line (SDA) transitions from low to high while the clock line (SCL) is high.

Serial communication can only occur between two devices, requiring multiple independent connections and increasing complexity as the number of devices grows.