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參數(shù)資料
| 型號： | DS2417 |
| 英文描述： | 1-Wire Time Chip With Interrupt |
| 中文描述： | 1-Wire時(shí)鐘芯片，帶有中斷 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 260K |
| 代理商： | DS2417 |
DS2417
4 of 15
TIMEKEEPING
A 32.768 kHz crystal oscillator is used as the time base for the real-time clock counter. The oscillator can
be turned on or off under software control. The oscillator must be on for the real time clock to function.
The real-time clock counter is double buffered. This allows the master to read time without the data
changing while it is being read. To accomplish this, a snapshot of the counter data is transferred to a
read/write buffer, which the user accesses.
DEVICE CONTROL BYTE
The DS2417 can generate interrupt pulses to trigger activities that have to occur at regular intervals. The
selection of this interval and the on/off control of the 32.768 kHz crystal oscillator are done through the
device control byte. This byte can be read and written through the Clock Function commands.
Device Control Byte
7
IE
IS2
6
5
4
3
2
1
0
0
0
IS1
IS0
OSC
OSC
Bit 0 - 1
Bits 0 and 1 are hard-wired to read all 0’s.
0
No function
Bit 2 - 3
These bits control/report whether the 32.768 kHz crystal oscillator is running. If the oscillator is running,
both OSC bits will read 1. If the oscillator is turned off these bits will all read 0. When writing the
device control byte both occurrences of the OSC bit should have identical data. Otherwise the value in
bit address 3 (bold) takes precedence.
OSC
Oscillator Enable/Disable
Bit 4 - 6
These bits determine the time between interrupt pulses. The values available are shown below.
IS2
IS1
IS0
Interrupt Interval
0
0
0
1s
0
0
1
4s
0
1
0
32s
= 0.53 min
0
1
1
64s
= 1.07 min
1
0
0
2048s
= 34.13 min
1
0
1
4096s
= 68.27 min
1
1
0
65536s = 18.20 hours
1
1
1
131072s= 36.41 hours
IS
Interval Select
Bit 7
IE
Interrupt Enable
This bit controls whether the interrupt pulse will be generated at the selected interval. To enable
interrupts this bit needs to be 1.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2417P | 1-Wire Time Chip With Interrupt |
| DS2417V | 1-Wire Time Chip With Interrupt |
| DS2423 | 4kbit 1-Wire RAM with Counter |
| DS2423P | 4kbit 1-Wire RAM with Counter |
| DS2423X | 4kbit 1-Wire RAM with Counter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2417_07 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1-Wire Time Chip with Interrupt |
| DS2417MP000 | 制造商:Thomas & Betts 功能描述:DS2417MP000 200A,PLG,3P4W,MG,417 制造商:Thomas & Betts 功能描述:200A,PLG,3P4W,MG,417,3P208V |
| DS2417P | 功能描述:實(shí)時(shí)時(shí)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(shí)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 |
| DS2417P/T&R | 制造商:Maxim Integrated Products 功能描述:IC TIMECHIP W/INTRPT 1WIRE 6TSOC |
| DS2417P/T&R | 功能描述:實(shí)時(shí)時(shí)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(shí)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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