參數(shù)資料
型號(hào)： STK17T88-RF45
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： PROGRAMMABLE TIMER, PDSO48
封裝： 0.300 INCH, ROHS COMPLIANT, PLASTIC, SSOP-48
文件頁(yè)數(shù)： 18/29頁(yè)
文件大?。?/td> 535K
代理商： STK17T88-RF45
25
STK17T88
Jan, 2008
Document Control #ML0024 Rev 2.0
0x7FF0
Flags
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 register is
read or on power-up
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
register is read or on power-up
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 register is read or on power-up.
OSCF
Oscillator Fail Flag. Set to 1 on power-up only if the oscillator is enabled and not
running in the first 5ms of operation. This indicates that the RTC backup power failed
and the clock value is no longer valid. The user must reset this bit to 0 to clear this
condition.
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 freezes updates of the RTC registers. The user can
then write to the RTC registers, Alarm registers, Calibration register, Interrupt register
and Flags register. Setting the W bit to 0 disables writes to the registers and causes the
contents of the real time clock registers to be transferred to the timekeeping counters if
the time has changed (a new base time is loaded). The bit defaults to 0 on power up.
R
Read Time. Setting the R bit to 1 captures the current time in holding registers so that
clock updates are not during the reading process. Set the R bit to 0 to enable the
holding register to resume clock updates. The bit defaults to 0 on power up.
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STK17T88-RF45ITR 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)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
STK17T88-RF45TR 功能描述:NVRAM 32Kbx8+RTC 2.7-3.6V RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時(shí)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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