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參數(shù)資料
| 型號： | DS2422 |
| 英文描述： | 1-Wire Temperature/Datalogger with 8kB Datalog Memory |
| 中文描述： | 1-Wire®溫度/數(shù)據(jù)記錄器，帶有8KB數(shù)據(jù)記錄存儲器 |
| 文件頁數(shù)： | 8/48頁 |
| 文件大小： | 444K |
| 代理商： | DS2422 |
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DS2422
8 of 48
Figure 3. DS2422 Block Diagram
All circuitry is powered by the battery
unless otherwise specified
Internal
Timekeeping &
Control Reg. &
Counters
3V Lithium
General-Purpose
SRAM
(512 Bytes)
Register Pages
(64 Bytes)
Calibration Memory
(64 Bytes)
Datalog
Memory
8k Bytes
32.768kHz
Oscillator
Control
Logic
256-Bit
Scratchpad
Memory
Function
Control
ROM
Function
Control
64-Bit
Lasered
ROM
Parasite
Powered
Circuitry
1-Wire
Port
I/O
ADC1
Thermal
Sense
VPAD
CNVST
SCLK
SDATA
PUMP_ONZ
5V Pad
Structures
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OVERVIEW
The block diagram in Figure 3 shows the relationships between the major control and memory sections of the
DS2422. The device has six main data components: 1) 64-bit lasered ROM, 2) 256-bit scratchpad, 3) 512-byte
general-purpose SRAM, 4) two 256-bit register pages of timekeeping, control, status, and counter registers and
passwords, 5) 64 bytes of calibration memory, and 6) 8192 bytes of data-logging memory. Except for the ROM and
the scratchpad, all other memory is arranged in a single linear address space. The data-logging memory, counter
registers and several other registers are read-only for the user. Both register pages are write-protected while the
device is programmed for a mission. The password registers, one for a read password and another one for a
read/write password can only be written to, never read.
The hierarchical structure of the 1-Wire protocol is shown in Figure 4. The bus master must first provide one of the
eight ROM function commands: 1) Read ROM, 2) Match ROM, 3) Search ROM, 4) Conditional Search ROM, 5)
Skip ROM, 6) Overdrive-Skip ROM, 7) Overdrive-Match ROM or 8) Resume. Upon completion of an Overdrive
ROM command byte executed at standard speed, the device will enter Overdrive mode, where all subsequent
communication occurs at a higher speed. The protocol required for these ROM function commands is described in
Figure 14. After a ROM function command is successfully executed, the memory and control functions become
accessible and the master may provide any one of the eight available commands. The protocol for these memory
and control function commands is described in Figure 12.
All data is read and written least significant bit first.
相關PDF資料 |
PDF描述 |
|---|---|
| DS2422S | 1-Wire Temperature/Datalogger with 8kB Datalog Memory |
| DS2482-800 | Eight-Channel 1-Wire Master |
| DS2482-100 | Single-Channel 1-Wire Master |
| DS2482S-100 | Single-Channel 1-Wire Master |
| DS2482S-800 | Eight-Channel 1-Wire Master |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2422P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Serial SRAM |
| DS2422S | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS2422S+ | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS2422X | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| DS2423 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:4kbit 1-Wire RAM with Counter |
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