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參數(shù)資料
| 型號： | RX-4045NBAA |
| 元件分類： | XO, clock |
| 英文描述： | REAL TIME CLOCK, PDSO22 |
| 封裝： | ROHS COMPLIANT, SON-22 |
| 文件頁數(shù)： | 20/37頁 |
| 文件大小： | 554K |
| 代理商： | RX-4045NBAA |
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RX - 4045 SA / NB
Page - 24
MQ442-01
8.8.4. Estimation of status based on detection results
The power supply status and clock status can be confirmed by reading the detection results indicated by the PON,
/XST, and VDET bits.
The following are status estimates based on various combinations of detection results.
Address F h
Control 2 Register
Estimated status
bit 4
bit 5
bit 6
PON
/ XST VDET
Status of power supply and
oscillation circuit
Status of clock and backup
0
No supply voltage drop,
but oscillation has
stopped.
Clock abnormality has occurred
→ Initialization is
required
Clock has stopped temporarily, possibly due to
condensation.
0
1
Supply voltage has
dropped and oscillation
has stopped.
Clock abnormality has occurred
→ Initialization is
required
Clock has stopped, perhaps due to drop in backup
power supply.
0
1
0
Normal status.
0
1
Supply voltage has
dropped but oscillation
continues.
Clock is normal, but an abnormality exists in the power
supply.
Backup power supply may have dropped to a
hazardous level.
1
0
Χ
Supply voltage has
dropped to 0 V.
1
Χ
Power supply flickering is
likely.
Initialization is required regardless of the clock status
and whether or not a voltage drop has occurred.
Initialization is required due to bits that are reset
when PON = "1".
The example shown above is when a "1" has already been written to /XST.
32768-Hz oscillation
Power-on reset (PON)
Oscillation stop detection
(/XST)
Threshold voltage ( 2.1 V or 1.3 V )
Normal voltage detector
VDET
←0
/XST
←1
Supply voltage
PON,VDET
←0
/XST
←1
Supply voltage monitor
(VDET)
Internal initialization
period (1 to 2 s)
PON, VDET
←0
/XST
←1
Internal initialization
period (1 to 2 s)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RX-4045SA | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-wire serial interface high-stability RTC module |
| RX-4045SA,(AA) | 制造商:Epson Toyocom 功能描述:Serial Interface RTC SOP 14pin |
| RX-4045SAAA | 制造商:Epson Toyocom Corporation 功能描述:Cut Tape 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL SMD SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14; Date Format:YYYY:MM:DD:Hr:Min:Secs; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:1.7V; Supply Voltage Max:5.5V; Digital IC Case Style:SOP; No. of Pins:14; Interface Type:Serial;;RoHS Compliant: Yes |
| RX-409 | 功能描述:烙鐵 SOLDERING TIP RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included |
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