R2023K datasheet(25/50 Pages) RICOH

25 / 50 page

R2023K/T

(4) Data Transmission Write Format in the R2023K/T

Although the I

2C-Bus standard defines a transmission format for the slave allocated for each IC, transmission

method of address information in IC is not defined.

The R2023K/T transmits data the internal address pointer

(4bit) and the Transmission Format Register (4bit) at the 1byte next to one which transmitted a Slave Address and

a write command.

For write operation only one transmission format is available and (0000) is set to the

Transmission Format Register.

The 3byte transmits data to the address specified by the internal address pointer

written to the 2byte.

Internal address pointer setting are automatically incremented for 4byte and after.

Note that

when the internal address pointer is Fh, it will change to 0h on transmitting the next byte.

Data

A P

Example of data writing (When writing to internal address Eh to Fh)

Master to slave

Slave to master

Start Condition

Stop Condition

Acknowledge signal

Address

Pointer

←Eh

R/W=0(Write)

Slave Address

←(0110010)

0 0 0

1 1

Transmission

Format

←

Writing of data to the

internal address Fh

Writing of data to the

internal address Eh

R2023K Datasheet(PDF) 25 Page - RICOH electronics devices division