参数资料
型号: RT5C348B
厂商: RICOH COMPANY LTD
元件分类: XO, clock
英文描述: 4-WIRE SERIAL INTERFACE
中文描述: REAL TIME CLOCK, PDSO10
封装: 4 X 2.90 MM, 0.85 MM HEIGHT, 0.50 MM PITCH, TSSOP-10
文件页数: 27/45页
文件大小: 1276K
代理商: RT5C348B
Rx5C348A/B
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 2.1 or 1.6v 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)
XSTP
VDD
2.1v or 1.6v
1s
VDET
←0
7.8ms
Sampling timing for
VDD supply voltage
Internal
initialization
period
(1 to 2sec.)
XSTP
←0
VDET
←0
12345
Rev.2.01
- 33 -
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