R2023K datasheet(26/50 Pages) RICOH

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R2023K/T

(5) Data transmission read format of the R2023K/T

The R2023K/T allows the following three read out method of data an internal register.

The first method to reading data from the internal register is to specify an internal address by setting the internal

address pointer and the transmission format register described P25 (4), generate the Repeated Start Condition

(See P24 (3)) to change the data transmission direction to perform reading.

The internal address pointer is set to

Fh when the Stop Condition is met. Therefore, this method of reading allows no insertion of Stop Condition before

the Repeated Start Condition.

Set 0h to the Transmission Format Register when this method used.

Data

/A P

Example 1 of Data Read (when data is read from 2h to 4h)

Master to slave

Slave to master

Start Condition

Repeated Start

Condition

Acknowledge signal

Address

Pointer

←2h

Repeated Start Condition

0 0 0

Transmission

Format

←0h

Slave Address

← (0110010)

0 0

Data

Reading of data from

the internal address 3h

R/W=1(Read)

R/W=0(Write)

Stop Condition

Slave Address

← (0110010)

Reading of data from

the internal address 4h

Reading of data from

the internal address 2h

R2023K Datasheet(PDF) 26 Page - RICOH electronics devices division

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