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參數資料
| 型號： | STK17TA8-R45 |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | REAL TIME CLOCK, PDSO48 |
| 封裝： | 0.300 INCH, 0.025 INCH PITCH, PLASTIC, SSOP-48 |
| 文件頁數： | 16/25頁 |
| 文件大?。?/td> | 285K |
| 代理商： | STK17TA8-R45 |
STK17TA8
April 2005
Document Control #ML0025 rev 1.1
23
Flags
0x1FFF0
D7
D6
D5
D4
D3
D2
D1
D0
WDF
AF
PF
OSCF
0
CAL
W
R
WDF
Watchdog Timer Flag. This read-only bit is set to 1 when the watchdog timer is allowed to reach 0
without being reset by the user. It is cleared to 0 when the Flags/Control register is read.
AF
Alarm Flag. This read-only bit is set to 1 when the time and date match the values stored in the
alarm registers with the match bits = 0. It is cleared when the Flags/Control register is read.
PF
Power-fail Flag. This read-only bit is set to 1 when power falls below the power-fail threshold
Vswitch. It is cleared to 0 when the Flags/Control register is read.
OSCF
Oscillator Fail Flag. Set to 1 on power-up only if the oscillator is not running in the first 5ms of
power-on operation. This indicates that time counts are no longer valid. The user must reset this
bit to 0 to clear this condition. The chip will not clear this flag. This bit survives power cycles.
CAL
Calibration Mode. When set to 1, a 512Hz square wave is output on the INT pin. When set to 0,
the INT pin resumes normal operation. This bit defaults to 0 (disabled) on power up.
W
Write Time. Setting the W bit to 1 freeze updates of the timekeeping registers. The user can then
write them with updated values. Setting the W bit to 0 causes the contents of the time registers to
be transferred to the timekeeping counters.
R
Read Time. Setting the R bit to 1 copies a static image of the timekeeping registers and places
them in a holding register. The user can then read them without concerns over changing values
causing system errors. The R bit going from 0 to 1 causes the timekeeping capture, so the bit must
be returned to 0 prior to reading again.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| STK17TA8-RF25 | 功能描述:NVRAM 128Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17TA8-RF25I | 功能描述:NVRAM 128Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17TA8-RF25IL | 制造商:Cypress Semiconductor 功能描述: |
| STK17TA8-RF25ITR | 功能描述:NVRAM 128Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK17TA8-RF25TR | 功能描述:NVRAM 128Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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