SC7283 datasheet(41/89 Pages) SITRONIX

41 / 89 page

SC7283

Version 1.0

Page 41 of 89

2018/11

7.2.3 System Configuration

The system configuration is illustrated above and some word-definitions are explained below:

a. Transmitter: the device which sends the data to the bus.

b. Receiver: the device which receives the data from the bus.

c. Master: the device which initiates a transfer generates clock signals and terminates a transfer.

d. Slave: the device which is addressed by a master.

e. Multi-Master: more than one master can attempt to control the bus at the same time without corrupting the

message.

f. Arbitration: the procedure to ensure that, if more than one master tries to control the bus simultaneously,

only one is allowed to do so and the message is not corrupted.

g. Synchronization: procedure to synchronize the clock signals of two or more devices.

7.2.4 Acknowledgment

Each byte of eight bits is followed by an acknowledge-bit. The acknowledge-bit is a HIGH signal put on SDA

by the transmitter during the time when the master generates an extra acknowledge-related clock pulse. A

slave receiver which is addressed must generate an acknowledge-bit after the reception of each byte. A

master receiver must also generate an acknowledge-bit after the reception of each byte that has been

clocked out of the slave transmitter. The device that acknowledges must pull-down the SDA line during the

acknowledge-clock pulse, so that the SDA line is stable LOW during the HIGH period of the

acknowledge-related clock pulse (set-up and hold times must be taken into consideration). A master receiver

must signal an end-of-data to the slave transmitter by not generating an acknowledge-bit on the last byte that

has been clocked out of the slave. In this event the transmitter must leave the data line HIGH to enable the

master to generate a STOP condition. Acknowledgement on the I2C Interface is illustrated as follows.

Data output by

Transmitter

SCL from

Master

Data output by

Receiver

START

Condition

Clock pulse for acknowledgement

Acknowledge

Not

acknowledge

SC7283 Datasheet(PDF) 41 Page - Sitronix Technology Co., Ltd.