PT7C4337 Datasheet, PDF (18/25 Pages) List of Unclassifed Manufacturers – Real-time Clock Module (I2C Bus)

Data Sheet
PT7C4337
Real-time Clock Module (I²C Bus)
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2) Read via I²C bus
a) Standard read
S
Slave address (7 bits)
write ^A
11010000
Addr. setting
A
Start
A
A
Slave address + write specification
C Address
C
K _{Specifies the read start address.}
K
Sr
Slave address (7 bits)
Read ^A
bit
7
bit
6
bit
5
bit
4
bit
3
bit
2
bit
1
bit
0
A ^{bit bit bit bit bit bit bit bit} /A
76543210
P
11 0 1 00 0 1
Restart
Slave address + read specification
A
C
Data read (1)
K _{Data is read from the specified start}
address and address auto increment.
A
C
Data read (2)
K _{Address auto increment to set the}
address for the next data to be read.
N Stop
O
A
C
K
b) Simplified read
S
Slave address (7 bits)
Read ^A
bit
7
bit
6
bit
5
bit
4
bit
3
bit
2
bit
1
bit
0
A ^{bit bit bit bit bit bit bit bit} /A
76543210
P
11 0 1 00 0 1
Start _{Slave address + read specification}
A
C
Data read (1)
K ^{Data is read from the address pointed}
by the internal address register and
address auto increment.
A
Data read (2)
N Stop
C
K
Address register auto increment to set
O
the address for the next data to be
A
read.
C
K
Note:
1. The above steps are an example of transfers of one or two bytes only. There is no limit to the number of bytes transferred
during actual communications.
2. 49H, 4AH are used as test mode address. Customer should not use the addresses.
PT0205(02/07)
18
Ver: 1