參數(shù)資料
型號: S-35390A-J8T1G
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝: LEAD FREE, SOP-8
文件頁數(shù): 29/56頁
文件大?。?/td> 529K
代理商: S-35390A-J8T1G
2-WIRE REAL-TIME CLOCK
Rev.3.0_00
S-35390A
Seiko Instruments Inc.
35
Reset After Communication Interruption
In case of communication interruption in the S-35390A, for example, during communication the power supply voltage
drops so that only the master device is reset; the S-35390A does not operate the next procedure because the internal
circuit keeps the state prior to interruption. The S-35390A does not have a reset pin so that users usually reset its internal
circuit by inputting a stop condition. However, if the SDA line is outputting “L” (during output of acknowledgment signal or
Read), the S-35390A does not accept a stop condition from the master device. In this case, users are necessary to finish
acknowledgment output or Read the SDA line. Figure 45 shows how to reset. First, input a start condition from the master
device (The S-35390A cannot detect a start condition because the SDA line in the S-35390A is outputting “L”). Next, input
a clock pulse equivalent to 7-byte data access (63-clock) from the SCL line. During this, release the SDA line for the
master device. By this procedure, SDA I/O before interruption is finished, so that the SDA line in the S-35390A is released.
After that, inputting a stop condition resets the internal circuit so that restore the regular communication. This reset
procedure is recommended to perform at initialization of the system after rising the master device’s power supply voltage.
1
2
62
63
8
9
Start
condition
Stop
condition
Clocks equivalent to 7-byte data access
SCL
“L”
“L” or High-Z
High-Z
SDA
(Output from
master device)
SDA
(Output from
S-35390A)
SDA
“L” or High-Z
“L”
Figure 45
How to Reset
相關(guān)PDF資料
PDF描述
S-35390A-T8T1 REAL TIME CLOCK, PDSO8
S-35392A-I8T1U 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35399A03-J8T2U 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35399A03-J8T2G 1 TIMER(S), REAL TIME CLOCK, PDSO8
S-35L32AEFSG REAL TIME CLOCK, PDSO10
相關(guān)代理商/技術(shù)參數(shù)
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