PT7C4363_13 Datasheet, PDF (18/20 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4363
Real-time Clock Module (I²C Bus)
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Operation
Read
Write
Transfer data
Slave address
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1
A3 h
A2 h
1
0
1
0
0
0
1
R / W bit
bit 0
1 (= Read)
0 (= Write)
2. I²C Bus’s Basic Transfer Format
S Start indication
P Stop indication
A RTC Acknowledge
Sr Restart indication
A Master Acknowledge
a) Write via I²C bus
S
Slave address (7 bits)
write ^A
10 1 0 00 1 0
Addr. setting
Start
Slave address + write specification
A
C Address
K _{Specifies the write start address.}
A ^{bit bit bit bit bit bit bit bit} A P
76543210
A
C Write data
K
A Stop
C
K
b) Read via I²C bus
 Standard read
S
Slave address (7 bits)
write ^A
10100010
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
7
bit
6
bit
5
bit
4
bit
3
bit
2
bit
1
bit
0
/
A
P
10 1 0 00 1 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
2013-06-0002
PT0207-6 06/18/13
18