參數(shù)資料
型號: R2043T-E2
廠商: RICOH COMPANY LTD
元件分類: XO, clock
英文描述: 4-wire Serial Interface
中文描述: REAL TIME CLOCK, PDSO10
封裝: 4 X 2.9 MM, 1 MM HEIGHT, TSSOP-10
文件頁數(shù): 36/48頁
文件大小: 458K
代理商: R2043T-E2
R2043K/T
O
Voltage Monitoring Circuit
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.
12345
Rev.2.06 - 36 -
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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