參數(shù)資料
型號(hào)： R2043T
廠(chǎng)商： Ricoh Co., Ltd.
英文描述： 4-wire Serial Interface
中文描述： 4線(xiàn)串行接口
文件頁(yè)數(shù)： 41/48頁(yè)
文件大小： 458K
代理商： R2043T
R2043K/T
12345
Rev.2.05 - 41 -
O
Connection of /INTR and 32KOUT Pin
The /INTR pin follows the N-channel open drain output logic and contains no protective diode on the power
supply side. As such, it can be connected to a pull-up resistor of up to 5.5v regardless of supply voltage.
The 32KOUT pin follows the N-channel open drain output logic, too. However, it contains protective diode on the
power supply side. As such, it cannot be connected to a pull-up resistor over VDD+0.3v. Such connection
involves considerations for the supply current requirements of a pull-up resistor, which can be roughly calculated
by the following equation:
I = 0.5
×
(VDD or VCC) / Rp
System power supply
(VDD)
VSB
OSCIN
OSCOUT
/INTR or 32KOUT
*1)
32768Hz
B
A
Backup power supply
(VCC)
VSS
O
Connection of CE Pin
Connection of the CE pin requires the following considerations:
1)
The CE pin is configured to enable the oscillation halt sensing circuit only when driven low. As such, it
should be driven low or open at power-on from 0v.
2)
The CE pin should also be driven low or open immediately upon the host going down (see "P.25
O
Considerations in Reading and Writing Time Data under special condition").
I/O
CONTROL
SO
SCLK
CE
SI
CE
Min.0
μ
s
VDD
Lower limit operating
voltage for the CPU
Min.0
μ
s
Min.0
μ
s
0.2
×
VDD
Backup power supply
*1) Depending on whether the /INTR or 32KOUT
pins are to be used during battery backup, it
should be connected to a pull-up resistor at
the following different positions:
(1) Position A in the left diagram when it is not to
be used during battery backup.
(2) Position B in the left diagram when it is to be
used during battery backup.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R2043T-E2 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:4-wire Serial Interface
R20440 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 400V 12A 2PIN DO-4 - Bulk
R2045D 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:4-wire Serial Interface Real Time Clock Module
R2045S 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:4-wire Serial Interface Real Time Clock Module
R20460 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 600V 12A 2PIN DO-4 - Bulk
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