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DS2480S

更新时间： 2024-02-05 02:00:32

品牌	Logo	应用领域
达拉斯 - DALLAS		驱动器
页数	文件大小	规格书
26页	189K
描述
Serial 1.Wire Line Driver

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数据手册

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DS2480S 数据手册

DS2480

DS2480 BLOCK DIAGRAM Figure 1

MS BIT OF SPEED CONTROL

(1 = RXD IS INVERTED)

MUX

RXD

CONFIGURATION

1–W

POL

TXD

PROTOCOL

CONVERTER

1–WIRE

DRIVER

PROTOCOL

ANALYZER

TIMING

GENERATOR

the timing generator the DS2480 and is not translated

into any activity on the 1–Wire bus. After this first com-

mand byte the device is ready to receive and execute

any command as described later in this document.

DEVICE OPERATION

The DS2480 can be described as a complex state

machine with two static and several dynamic states.

Two device–internal flags as well as functions assigned

to certain bit positions in the command codes determine

the behavior of the chip, as shown in the state transition

diagram (Figure 2). The DS2480 requires and gener-

atesacommunicationprotocolof8databitspercharac-

ter, 1 stop bit and no parity. It is permissible to use two

stop bits on the TXD line. However, the DS2480 willonly

assert a single stop bit on RXD.

A master reset cycle can alsobegeneratedbymeansof

software. This may be necessary if the host for any rea-

son has lost synchronization with the device. The

DS2480 will perform a master reset cycle equivalent to

the power–on reset if it detects start polarity in place of

the stop bit. The host has several options to generate

this condition. These include making the UART gener-

ate a break signal, sending a NULL character at a data

rate of 4800 bps and sending any character with parity

enabled and selecting space polarity for the parity bit.

As with the power–on reset, the DS2480 requires a

1–Wire reset command sent by the host at a data rate of

9600 bps for calibration.

When powering up, the DS2480 performs a master

reset cycle and enters the Command Mode, which is

one of the two static states. The device now expects to

receive one 1–Wire reset command on the TXD line

sent by the host at a data rate of 9600 bits per second

(see section Communication Commands for details).

This command byte is required solely for calibration of

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与DS2480S相关器件

型号	品牌	描述	获取价格	数据表
DS2482-100	DALLAS	Single-Channel 1-Wire Master	获取价格
DS2482-100	MAXIM	Single-Channel 1-Wire Master	获取价格
DS2482-100	ADI	单通道1-Wire主控制器	获取价格
DS2482-100_12	MAXIM	Single-Channel 1-Wire Master	获取价格
DS2482-101	MAXIM	Single-Channel 1-Wire Master with Sleep Mode	获取价格
DS2482-101	ADI	单通道1-Wire?主控制器，带有休眠模式	获取价格