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參數(shù)資料
| 型號： | DS1685Q-5 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 39/39頁 |
| 文件大?。?/td> | 290K |
| 代理商： | DS1685Q-5 |
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DS1685/DS1687
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CONTROL REGISTERS
The four control registers A, B, C, and D reside in both bank 0 and bank 1. These registers are accessible
at all times, even during the update cycle.
REGISTER A
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
UIP
DV2
DV1
DV0
RS3
RS2
RS1
RS0
UIP - The Update In Progress (UIP) bit is a status flag that can be monitored. When the UIP bit is a one,
the update transfer will soon occur. When UIP is a 0, the update transfer will not occur for at least 244
s. 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 1 inhibits any update transfer and clears
the UIP status bit.
DV2, DV1, DV0 - 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
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 or E32K bits;
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1685Q-5/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC 5V 64-BIT Y2KC 28-PLCC |
| DS1685Q-5/T&R | 功能描述:實時時鐘 3V/5V RTC 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 |
| DS1685Q-5/TR | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685Q-5_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
| DS1685Q-5+ | 功能描述:實時時鐘 3V/5V RTC 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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