- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376957 > DS1689 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control PDF資料下載
參數(shù)資料
| 型號： | DS1689 |
| 英文描述： | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 321K |
| 代理商： | DS1689 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當(dāng)前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
DS1689/DS1693
12 of 32
REGISTER A
MSB LSB
BIT 7
BIT 6
BIT 5
BIT 4
UIP
DV2
DV1
DV0
BIT 3
RS3
BIT 2
RS2
BIT 1
RS1
BIT 0
RS0
UIP
- The Update In Progress (UIP) bit is a status flag that can be monitored. When the UIP bit is a 1, the
update transfer will soon occur. When UIP is a 0, the update transfer will not occur for at least 244 ms.
The time, calendar, and alarm information in RAM is fully available for access when the UIP bit is 0. The
UIP bit is read-only. Writing the SET bit in Register B to a one inhibits any update transfer and clears the
UIP status bit.
DV0, DV1, DV2
- These bits are defined as follows:
DV2 =
Countdown Chain
1 - resets countdown chain only if DV1=1
0 - countdown chain enabled
DV1 =
Oscillator Enable
0 - oscillator off
1 - oscillator on
DV0 =
Bank Select
0 - original bank
1 - extended registers
A pattern of 01X is the only combination of bits that will turn the oscillator on and allow the RTC to keep
time. A pattern of 11X will enable the oscillator but holds the countdown chain in reset. The next update
will occur at 500 ms after a pattern of 01X is written to DV2, DV1, and DV0.
RS3, RS2, RS1, RS0
- These four rate-selection bits select one of the 13 taps on the 15-stage divider or
disable the divider output. The tap selected can be used to generate an output square wave (SQW pin)
and/or a periodic interrupt. The user can do one of the following:
Enable the interrupt with the PIE bit;
Enable the SQW output pin with the SQWE bit;
Enable both at the same time and the same rate; or
Enable neither.
Table 2 lists the periodic interrupt rates and the square wave frequencies that can be chosen with the RS
bits.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1689S | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1689SN | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1693 | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1699-010 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-10 | ELECTRONIC DIGITAL RHEOSTAT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689_05 | 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 |
| DS1689S | 功能描述:實(shí)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 |
| DS1689S/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 |
| DS1689S/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 |
| DS1689S/T&R | 制造商:Rochester Electronics LLC 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。