RV5C338A datasheet(26/52 Pages) RICOH | 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION?

Part No.	RV5C338A

Description	3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION?

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Manufacturer	RICOH [RICOH electronics devices division]

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×5C338A

1.3-2 Burst Writing Data Transfer Format

The second type of writing data transfer format is designed to transfer a sequence of data serially and can be

selected by specifying in the address pointer a head address with which writing data transfer is to be commenced

and then writing the setting of 0h to the transfer format register. The address pointer is incremented for each

transfer of 1-byte data and cycled from Fh to 0h. This burst writing data transfer can be completed by driving the

CE pin low.

Example of Burst Writing Data Transfer

(For Writing Data to Addresses Eh, Fh, and Oh)

1 1 1 0 0

0

Specifying Eh

in the address

pointer

Writing data

to address Eh

Writing data

to address Fh

Data

Data transfer from the host

Data transfer from the real-time clocks

CE

SIO

Setting 0h

in the transfer

format register

Writing data

to address 0h

1 1 1 0 1

0

1

Specifying Eh

in the address

pointer

Reading data

from address Eh

Data transfer from the host

Data transfer from the real-time clocks

CE

SIO

Setting Ch

in the transfer

format register

Specifying 2h

in the address

pointer

Setting Ch

in the transfer

format register

Reading data

from address 2h

Data

0 0 1 0 1

0

1

1.4 Reading Data Transfer Formats

1.4-1 1-byte Reading Data Transfer Format

The first type of reading data transfer format is designed to transfer 1-byte data at a time and can be selected by

specifying in the address pointer a head address with which reading data transfer is to be commenced and then the

setting of writing Ch to the transfer format register. This 1-byte reading data transfer can be completed by driving

the CE pin low or continued by specifying a new head address in the address pointer and setting the transfer format.

Example of 1-byte Reading Data Transfer

(For Reading Data from Addresses Eh and 2h)

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RV5C338A Datasheet(PDF) 26 Page - RICOH electronics devices division

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