- 您现在的位置：买卖IC网 > PDF目录98148 > STK17TA8-W25 REAL TIME CLOCK, PDIP40 PDF资料下载
参数资料
| 型号： | STK17TA8-W25 |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDIP40 |
| 封装： | 0.600 INCH, 0.100 INCH PITCH, PLASTIC, DIP-40 |
| 文件页数： | 16/25页 |
| 文件大小： | 285K |
| 代理商： | STK17TA8-W25 |
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 This indicates that time counts are no longer valid.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.
相关PDF资料 |
PDF描述 |
|---|---|
| STK17TA8-R45 | REAL TIME CLOCK, PDSO48 |
| STK17TA8-R25 | REAL TIME CLOCK, PDSO48 |
| STK17TA8RF25I | REAL TIME CLOCK, PDSO48 |
| STLED316SMTR | 4 X 17 SEGMENTS SEGMENT LED DRVR AND DSPL CTLR, PDSO24 |
| STM32F101C8T6 | 32-BIT, FLASH, 36 MHz, RISC MICROCONTROLLER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STK190-110 | 制造商:Panasonic Industrial Company 功能描述:IC |
| STK2 | 制造商:Eaton Corporation 功能描述:Seltronic And Series C 310 Tes 制造商:Eaton Corporation 功能描述:Seltronic And Series C 310 Test Kit |
| ST-K2 | 制造商:SYNERGY 制造商全称:SYNERGY MICROWAVE CORPORATION 功能描述:TRRANSSFFORRMEERRS |
| STK2025 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:OUTPUT STAGE OF AF POWER AMP |
| STK2029 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:OUTPUT STAGE OF AF POWER AMP |
发布紧急采购，3分钟左右您将得到回复。