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參數(shù)資料
| 型號： | DS1689SN |
| 英文描述： | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| 中文描述： | 3-Volt/5-Volt序列實時時鐘的非易失RAM控制 |
| 文件頁數(shù)： | 6/32頁 |
| 文件大?。?/td> | 321K |
| 代理商： | DS1689SN |
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DS1689/DS1693
6 of 32
When 5-volt operation is selected, the device is fully accessible and data can be written and read only
when V
CCI
is greater than 4.5 volts. When V
CCI
is below 4.5 volts, read and writes are inhibited. However,
the timekeeping function continues unaffected by the lower input voltage. As V
CC
falls below the greater
of V
BAT
and V
BAUX
, the RAM and timekeeper are switched over to a lithium battery connected either to
the V
BAT
pin or V
BAUX
pin.
When 3-volt operation is selected and applied within normal limits, the device is fully accessible and data
can be written or read. When V
CCI
falls below V
PF
, access to the device is inhibited. If V
PF
is less than
V
BAT
and V
BAUX
, the power supply is switched from V
CCI
to the backup supply (the greater of V
BAT
and
V
BAUX
) when V
CCI
drops below V
PF
. If V
PF
is greater than V
BAT
and V
BAUX
, the power supply is switched
from V
CCI
to the backup supply when V
CCI
drops below the larger of V
BAT
and V
BAUX
.
When V
CC
falls below V
PF
, the chip is write-protected. With the possible exception of the
KS
,
PWR
, and
SQW pins, all inputs are ignored and all outputs are in a high impedance state.
RTC ADDRESS MAP
The address map for the RTC registers of the DS1689/DS1693 is shown in Figure 2. The address map
consists of the 14-clock/calendar registers. Ten registers contain the time, calendar, and alarm data, and
four bytes are used for control and status. All registers can be directly written or read except for the
following:
1.
Registers C and D are read-only.
2.
Bit 7 of Register A is read-only.
3.
The high order bit of the seconds byte is read-only.
DS1689 REAL TIME CLOCK ADDRESS MAP
Figure 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1693 | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1699-010 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-10 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-100 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-50 | ELECTRONIC DIGITAL RHEOSTAT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689SN/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689SN/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689SN/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC SER NV RAM CTRL IN 28SOIC |
| DS1689SN/T&R | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689SN+ | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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