Micro Crystal

Real Time Clock / Calendar Module

RV-8564

24/40

10.3.SYSTEM CONFIGURATION

Since multiple devices can be connected with the I2C bus, all I2C bus devices have a fixed and unique device

number built-in to allow individual addressing of each device.

The device that controls the I2C bus is the Master; the devices which are controlled by the Master are the Slaves.

A device generating a message is a Transmitter; a device receiving a message is the Receiver. The RV-8564 acts

as a Slave-Receiver or Slave-Transmitter.

Before any data is transmitted on the I2C bus, the device which should respond is addressed first. The addressing

is always carried out with the first byte transmitted after the start procedure. The clock signal SCL is only an input

signal, but the data signal SDA is a bidirectional line.