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参数资料
| 型号： | DS1682 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), TIME RECORDER, PDSO8 |
| 封装： | MICRO, SOP-8 |
| 文件页数： | 10/13页 |
| 文件大小： | 77K |
| 代理商： | DS1682 |
DS1682
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Over bit is set to a 1 the first time that the 2 byte Event Counter reaches FFh and rolls over to 00h. Once
the Event Roll Over bit is set to a 1 and the Event Counter reaches FFh, event counting will stop and the
event counter will not roll over to 00h again. This value is not erasable when the Reset Enable and the
AoR bits in the Configuration register are set to a zero and does not require a power source to maintain
the contents to insure the data’s integrity. This register can only be cleared when the Reset Enable bit is
set to a one or the AoR bit is set to a 1 and the Alarm# pin is held high, and the Reset command is sent
via the 2-wire bus.
RESET COMMAND
The DS1682 can only be reset when the Reset Enable bit is set to a one or the AoR bit is set to a one with
the Alarm# pin held high, and the Reset command is sent via the 2-wire bus by writing 55h into memory
location 1Dh. With the Reset Enable bit set to a 0, the AoR bit set to a 0 or the AoR bit set to a 1 and the
Alarm# pin held low, the Reset command is ignored by the DS1682. With the Write Disable flag set to a
1, the contents of the Alarm Trip Point and the Configuration register that are protected/locked by this bit
can not be written to or erased, even if the Reset Enable bit is set to a 1. The Reset command when the
Reset Enable bit is set to a one or the AoR bit set to a 1 and Alarm# held high, will erase the contents of
the Elapsed Time Counter, Total Time Accumulator, and Event Counter. The Reset Command will
always read 0 if the memory location is read by the user.
CONFIGURATION REGISTER
MSb
LSb
AoR
AF
WDF
WMDF
AOS
RE
AP
ERO
AoR – Alarm or Reset Enable - The Alarm or Reset Enable bit maps either the Alarm output or the Reset
Enable Input to the Alarm# pin. With the AoR bit set to a zero, the Alarm output will be mapped to the
Alarm# pin. When the AoR bit is set to a one, the Reset Enable input will be mapped to the Alarm# pin.
The standard factory setting for the AoR bit is 0. The Reset Enable input is OR’ed with the RE bit and
will perform the same function only from outside the device.
The Reset Enable input, if pulled high, will allow the D1682 to accept the Reset command via the 2-wire
bus to clear the Total Time Accumulator and Event Counter. If the Reset Enable input is pulled low, the
DS1682 will not respond to the 2-wire command to reset the Total Time Accumulator register or the
Event Counter to zero. This input allows the designer to permanently enable the reset function, enable
the function during the manufacturing process and then disable it, or turn it on and off when the
authorized repair person has completed repairing or calibrating the equipment. There is no security
provided to this pin to prevent someone from enabling the reset function at any time by pulling the pin
high. The security will have to be provided by the system and/or enclosure, if required. If a switch or
button is used to Configuration the Reset Enable input, a debounce capacitor should be used to prevent
spikes on the input.
AF – Alarm Flag - The Alarm Flag is set to a 1 when the Alarm# output is activated. If the Alarm# pin
is not activated or enabled, the Alarm Flag will be set to a 0. This bit can be cleared by the reset
command, but will be set again at the end of the next event in which the ETC and ATP values cause the
Alarm# pin to be enabled or activated. This bit can not be written by the user.
WDF – Write Disable Flag – When the Write Disable Command is written to AAh twice at memory
location 1Eh, the WDF will be set to a 1 and can not be cleared or reset. When the WDF is set to a 1, the
Alarm Trip Point and Configuration register are read-only. The Total Time Accumulator, Elapsed Time
Counter, and Event Counter will also be read only if the Reset Enable and AoR bits are set to a 0. When
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PDF描述 |
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| DS1685-3 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS1687-5 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS1685Q-3 | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1682_13 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Total-Elapsed-Time Recorder with Alarm |
| DS1682S | 功能描述:实时时钟 Total-Elapsed-Time Recorder w/Alarm RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1682S/GG8 | 制造商:Maxim Integrated Products 功能描述: |
| DS1682S/T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10BYTE 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER ALARM ELAPSE 8SOIC |
| DS1682S/T&R | 功能描述:实时时钟 Total-Elapsed-Time Recorder w/Alarm RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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