參數(shù)資料
型號(hào)： R2023K
廠商： Ricoh Co., Ltd.
英文描述： 2-wire Serial Interface Real Time Clock IC
中文描述： 2線串行接口實(shí)時(shí)時(shí)鐘芯片
文件頁(yè)數(shù)： 37/50頁(yè)
文件大小： 512K
代理商： R2023K
R2023K/T
37
32768Hz Oscillation
Power-on reset flag
(PON)
Oscillation halt
sensing flag (XST)
Threshold voltage (2.1V or 1.35V)
VDD
VDD supply voltage
monitor flag (VDET)
Internal initialization
period (1 to 2 sec.)
VDET
←
0
XST
←
1
PON
←
0
VDET
←
0
XST
←
1
PON
←
1
VDET
←
0
XST
←
1
PON
←
0
Internal initialization
period (1 to 2 sec.)
When the PON bit is set to 1 in the control register 2, the DEV, F6 to F0, WALE, DALE, 12 /24, CLEN2 , TEST,
CT2, CT1, CT0, VDSL, VDET, CLEN1 , CTFG, WAFG, and DAFG bits are reset to 0 in the oscillation adjustment
register, the control register 1, and the control register 2. The PON bit is also set to 1 at power-on from 0 volts.
< Considerations in Using Oscillation Halt Sensing Circuit >
Be sure to prevent the oscillation halt sensing circuit from malfunctioning by preventing the following:
1) Instantaneous power-down on the VDD
2) Condensation on the quartz crystal unit
3) On-board noise to the quartz crystal unit
4) Applying to individual pins voltage exceeding their respective maximum ratings
In particular, note that the
XST
bit may fail to be set to 0 in the presence of any applied supply voltage as
illustrated below in such events as backup battery installation. Further, give special considerations to prevent
excessive chattering in the oscillation halt sensing circuit.
VDD
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R2023K-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2-wire Serial Interface Real Time Clock IC
R2023T 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2-wire Serial Interface Real Time Clock IC
R2023T-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2-wire Serial Interface Real Time Clock IC
R2-0257-02 制造商:Southco 功能描述:
R2-0259-02 制造商:Southco 功能描述:
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