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參數(shù)資料
| 型號(hào)： | DS2433S |
| 英文描述： | 4k-Bit 1-Wire EEPROM |
| 中文描述： | 4K的位的1 - Wire的EEPROM |
| 文件頁數(shù)： | 10/19頁 |
| 文件大小： | 588K |
| 代理商： | DS2433S |
DS2433
10 of 19
HARDWARE CONFIGURATION
Figure 8
*5k
is adequate for reading the DS2433. To write to a single device, a 2.2k
resistor and V
PUP
of at
least 4.0V is sufficient. For writing multiple DS2433s simultaneously or operation at low V
PUP
, the
resistor should be bypassed by a low-impedance pullup to V
PUP
while the device copies the scratchpad to
EEPROM.
1-WIRE BUS SYSTEM
The 1-Wire bus is a system which has a single bus master and one or more slaves. In all instances the
DS2433 is a slave device. The bus master is typically a micro-controller. The discussion of this bus
system is broken down into three topics: hardware configuration, transaction sequence, and 1-Wire
signaling (signal types and timing). A 1-Wire protocol defines bus transactions in terms of the bus state
during specific time slots that are initiated on the falling edge of sync pulses from the bus master. For a
more detailed protocol description, refer to Chapter 4 of the Book of DS19xx iButton Standards.
HARDWARE CONFIGURATION
The 1-Wire bus has only a single line by definition; it is important that each device on the bus be able to
drive it at the appropriate time. To facilitate this, each device attached to the 1-Wire bus must have open
drain or 3-state outputs. The 1-Wire port of the DS2433 is open drain with an internal circuit equivalent
to that shown in Figure 8. A multidrop bus consists of a 1-Wire bus with multiple slaves attached. At
regular speed the 1-Wire bus has a maximum data rate of 16.3k bits per second. The speed can be
boosted to 142k bits per second by activating the Overdrive Mode. The 1-Wire bus requires a pullup
resistor of approximately 5k
.
The idle state for the 1-Wire bus is high. If for any reason a transaction needs to be suspended, the bus
MUST be left in the idle state if the transaction is to resume. If this does not occur and the bus is left low
for more than 16
μ
s (Overdrive Speed) or more than 120
μ
s (regular speed), one or more devices on the
bus may be reset.
TRANSACTION SEQUENCE
The protocol for accessing the DS2433 via the 1-Wire port is as follows:
§
Initialization
§
ROM Function Command
§
Memory Function Command
§
Transaction/Data
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2433T | 4k-Bit 1-Wire EEPROM |
| DS2433X | 4k-Bit 1-Wire EEPROM |
| DS2433Y | 4k-Bit 1-Wire EEPROM |
| DS2434 | Battery Identification Chip |
| DS2435 | Battery Identification Chip with Time/Temperature Histogram |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2433S/T&R | 功能描述:電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| DS2433S/TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| DS2433S+ | 功能描述:電可擦除可編程只讀存儲(chǔ)器 4Kb 1-Wire 電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| DS2433S+T&R | 制造商:Maxim Integrated Products 功能描述:EEPROM 制造商:Maxim Integrated Products 功能描述:IC EEPROM 4KBIT 8SO |
| DS2433S+T&R | 功能描述:電可擦除可編程只讀存儲(chǔ)器 4Kb 1-Wire 電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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