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參數(shù)資料
| 型號： | RS5C372B-E2 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | I2C-bus Serial Interface Real Time Clock (8pin SSOP) |
| 中文描述： | REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.65 MM PITCH, SSOP-8 |
| 文件頁數(shù)： | 20/39頁 |
| 文件大?。?/td> | 474K |
| 代理商： | RS5C372B-E2 |
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RS5C372B
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1.2.4. Data transmission write format in the RS5C372B
Although the I
2
C-bus standard defines a transmission format for the slave address allocated for each IC,
transmission method of address information in IC is not defined. The RS5C372B transmits data the
internal address pointer (4bit) and the transmission format register (4bit) at the 1byte next to one which
transmitted a slave address and a write command. For write operation only one transmission format is
available and (0000) is set to the transmission format register. The 3byte transmits data to the address
specified by the internal address pointer written to the 2 byte. Internal address pointer settings are
automatically incremented for 4byte and after. Note that when the internal address pointer is Fh, it will
change to 0h on transmitting the next byte.
1
A
S
0
A
Data
A
Data
A P
Example of data writing
(When writing to internal address Eh-Fh)
Master to slave
Slave to master
S
Start condition
P
Stop condition
A
A
/A
Acknowledge
Setting of Eh
to the Internal
Address
pointer
R/W=0(Write)
Transmission of
slave address
(0110010)
1
1
0
0
0
0
0
0 0 0
0
1 1
1
Setting of 0h
to the trans-
missionfor-
mat register
Writing of data to
the Internal
Address Fh
Writing of data to
the Internal
Address Eh
1.2.5. Data transmission read format of the RS5C372B
The RS5C372B allows the following three readout methods of data from internal registers.
1) 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 1.2.4., generate the repeated
start condition (see section 1.2.3.) 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 the stop condition before the resend start condition. Set 0h to the
transmission format register when this method is used.
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