參數(shù)資料
型號: R2023T
廠商: Ricoh Co., Ltd.
英文描述: 2-wire Serial Interface Real Time Clock IC
中文描述: 2線串行接口實時時鐘芯片
文件頁數(shù): 38/50頁
文件大?。?/td> 512K
代理商: R2023T
R2023K/T
Voltage Monitoring Circuit
38
The supply monitoring circuit is configured to conduct a sampling operation during an interval of 7.8ms per second
to check for a drop in supply voltage below a threshold voltage of 1.6 or 1.3v for the VDSL bit setting of 0 (the
default setting) or 1, respectively, in the Control Register 2, thus minimizing supply current requirements as
illustrated in the timing chart below. This circuit suspends a sampling operation once the VDET bit is set to 1 in
the Control Register 2. The supply voltage monitor is useful for back-up battery checking.
VDET
(D6 in Address Fh)
PON
VDD
1.6v or 1.3v
1s
VDET
0
7.8ms
Sampling timing for
VDD supply voltage
Internal
initialization
period
(1 to 2sec.)
PON
0
VDET
0
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