rs5c338a RICOH Co.,Ltd., rs5c338a Datasheet - Page 24

• Manufacturer Part Number: rs5c338a
• Description: 3-wire Serial Interface Real-time Clock Ics With Voltage Monitoring Function
• Manufacturer: RICOH Co.,Ltd.

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1.4-2 Burst Reading Data Transfer Format
The second type of reading 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 reading data transfer is to be commenced
and then writing the setting of 4h 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 reading data transfer can be completed by driving the
CE pin low.
1.4-3 Combination of 1-byte Reading and Writing Data Transfer Formats
The 1-byte reading and writing data transfer formats can be combined together and further followed by any other
data transfer format.
Example of Combination of 1-byte Reading and Writing Data Transfer (For Reading and Writing Data from and to
Address Fh)
The reading and writing data transfer formats correspond to the settings in the transfer format register as shown in
the table below.
Example of Burst Reading Data Transfer (For Reading Data from Addresses Fh, 0h, and 1h)
Writing data transfer
(for writing to real-time clock)
Reading data transfer
(for reading from real-time clock)
×
5C338A
CE
SIO
CE
SIO
Specifying Fh
in the address
pointer
Specifying Fh
in the address
pointer
1 1 1 1 1
1 1 1 1 0
Setting Ch
in the transfer
format register
Setting 4h
in the transfer
format register
Data transfer from the host
Data transfer from the host
1
1
0
0
0
0
1-byte transfer
Reading data
from address Fh
Reading data
from address Fh
(1,0,0,0)
(1,1,0,0)
Ch
8h
Data
Data
Specifying Fh
in the address
pointer
1 1 1 1 1
Burst (Successive) transfer
Reading data
from address 0h
Data transfer from the real-time clocks
Data transfer from the real-time clocks
Data
(0,0,0,0)
(0,1,0,0)
Setting 8h
in the transfer
format register
0h
4h
0
0
0
Writing data
to address Fh
Reading data
from address 1h
Data
Data