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參數(shù)資料
| 型號： | R2033T |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 3 wire interface Real-Time Clock ICs |
| 中文描述： | 3線接口實時時鐘芯片 |
| 文件頁數(shù)： | 23/50頁 |
| 文件大?。?/td> | 542K |
| 代理商： | R2033T |
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R2033K/T
(2) Data Transfer Formats
Data transfer is commenced in the low to high transition of the CE pin input and completed in its high to low
transition. Data transfer is conducted serially in multiple units of 1 byte (8 bits). The former 4 bits are used to
specify in the Address Pointer a head address with which data transfer is to be commenced from the host. The
latter 4 bits are used to select either reading data transfer or writing data transfer, and to set the Transfer Format
Register to specify an appropriate data transfer format. All data transfer formats are designed to transfer the
most significant bit (MSB) first.
23
A2
CE
SCLK
6
A1
A0
C3
C2
C1
C0
A3
7
5
8
2
3
1
2
3
1
4
D7
D6
D3
D2
D1
D0
Setting
the Address Pointer
Writing or Reading data transfer
Setting the Transfer
Format Register
SIO
Two types of data transfer formats are available for reading data transfer and writing data transfer each.
Writing Data Transfer Formats
(1) 1-byte Writing Data Transfer Format
The first type of writing 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 writing data transfer is to be commenced and then
writing the setting of 8h to the transfer format register. This 1-byte writing 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 data
transfer format.
Example of 1-byte Writing Data Transfer (For Writing Data to Addresses Fh and 7h)
1
1
Data
Data
Data transfer from the host
CE
Data transfer from the RTCs
Specifying 7h
in the
Address
Pointer
0
1
0 0
1
1
Setting 8h in
the Transfer
Format
Register
Writing data to
address Fh
Writing data to
address 7h
0
1
1
0 0 0
1 1
Specifying Fh
in the
Address
Pointer
Setting 8h in
the Transfer
Format
Register
SIO
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R2033T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
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