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参数资料
| 型号： | DS2423P/T&R |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Memory IC:Other |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, PDSO6 |
| 封装： | 3.70 X 4 MM, 1.50 MM HEIGHT, TSOC-6 |
| 文件页数： | 6/25页 |
| 文件大小： | 581K |
| 代理商： | DS2423P/T&R |
DS2423
14 of 25
HARDWARE CONFIGURATION Figure 8
Note: Depending on the 1-Wire communication speed and the bus load characteristics, the optimal pull-
up resistor (RPU) value will be in the 1.5kΩ to 5kΩ range.
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
DS2423 is a slave device. The bus master is typically a microcontroller. 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.
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 DS2423 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 16.3kbits per second. The speed can be boosted
to 142kbits per second by activating the Overdrive mode. The 1-Wire bus requires a pullup resistor of
approximately 5k. The 1-Wire bus requires a pullup resistor range of 1.5k
Ω to 5kΩ, depending on the
bus load characteristics.
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 16s (Overdrive speed) or more than 120s (regular speed), one or more devices on the bus
may be reset.
TRANSACTION SEQUENCE
The protocol for accessing the DS2423 via the 1-Wire port is as follows:
Initialization
ROM Function Command
Memory Function Command
Transaction/Data
RPU
DS2423
Not
Recommended
for
New
Design
相关PDF资料 |
PDF描述 |
|---|---|
| DS2423P | SPECIALTY MEMORY CIRCUIT, PDSO6 |
| DS2423X | SPECIALTY MEMORY CIRCUIT, UUC |
| DS2423 | 4K X 1 STANDARD SRAM, PDSO6 |
| DS2422 | 1K X 1 STANDARD SRAM, PDSO6 |
| DS2430AP | 256 X 1 1-WIRE SERIAL EEPROM, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2423V | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Serial SRAM |
| DS2423X | 功能描述:静态随机存取存储器 RoHS:否 制造商:Cypress Semiconductor 存储容量:16 Mbit 组织:1 M x 16 访问时间:55 ns 电源电压-最大:3.6 V 电源电压-最小:2.2 V 最大工作电流:22 uA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TSOP-48 封装:Tray |
| DS243 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS2430 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:256-Bit 1-Wire EEPROM |
| DS2430A | 功能描述:电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
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