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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 2/15頁(yè) |
| 文件大?。?/td> | 260K |
| 代理商： | DS2417 |
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DS2417
2 of 15
is successfully executed, the real-time clock functions become accessible and the master may then
provide one of the real-time clock function commands. The protocol for these commands is described in
Figure 5. All data is read and written least significant bit first.
DETAILED PIN DESCRIPTION
PIN
SYMBOL
1
GND
2
1-Wire
3
INT
4
V
DD
5, 6
X1, X2
DESCRIPTION
Ground Pin
Data input/output
Open drain.
Interrupt pin
Open drain.
Power input pin
. 2.5V to 5.5V.
Crystal pins.
Connections for a standard 32.768 kHz quartz crystal, EPSON
part number C-002RX or C-004R (be sure to request 6 pF load capacitance).
NOTE:
X1 and X2 are very high impedance nodes. It is recommended that they
and the crystal be guard-ringed with ground and that high frequency signals be
kept away from the crystal area. See Figure 10 and Application Note 58 for de-
tails.
BLOCK DIAGRAM
Figure 1
X1
X2
32.768 kHz
OSC./DIVIDER
1-WIRE
ROM
CONTROL
FUNCTION
64-BIT
LASERED
ROM
CLOCK
FUNCTION
CONTROL
RTC COUNTER (32-BIT)
OSCILLATOR
CONTROL
VDD
READ/WRITE BUFFER
1 Hz
INT. GENERATOR
INT\
64-BIT LASERED ROM
Each DS2417 contains a unique ROM code that is 64 bits long. The first eight bits are a 1-Wire family
code. The next 48 bits are a unique serial number. The last eight bits are a CRC of the first 56 bits. (See
Figure
3.) The 1-Wire CRC is generated using a polynomial generator consisting of a shift register and
XOR gates as shown in Figure 4. The polynomial is X
8
+ X
5
+ X
4
+ 1. Additional information about the
Dallas Semiconductor 1-Wire Cyclic Redundancy Check is available in the Book of DS19xx iButton
Standards. The shift register bits are initialized to zero. Then starting with the least significant bit of the
family code, one bit at a time is shifted in. After the 8th bit of the family code has been entered, then the
serial number is entered. After the 48th bit of the serial number has been entered, the shift register
contains the CRC value. Shifting in the eight bits of CRC should return the shift register to all zeros. The
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(chǔ)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(chǔ)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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