Datasheet > 驱动程序和接口 > 线路驱动器或接收器> DS2480S

DS2480S

更新时间： 2024-01-11 07:27:46

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

COMMUNICATION COMMAND CODES Table 1

FUNCTION

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3, BIT 2

BIT 1

BIT 0

Single Bit

0 = write 0

1 = write 1

00 reg. speed

01 flex. speed

10 OD. speed

11 reg. speed

See Text

Accelerator

Control

0 = accelerator off

1 = accelerator on

See Text

00 reg. speed

01 flex. speed

10 OD. speed

11 reg. speed

Reset

(don’t care)

00 reg. speed

01 flex. speed

10 OD. speed

11 reg. speed

Pulse

0 = 5V strong pull–up

1 = 12V prog. pulse

11 pulse

See Text

COMMUNICATION COMMAND RESPONSE Table 2

FUNCTION

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

Single Bit

same as sent

1–Wire read back,

both bits same value

Reset

Pulse

See

Text

00 = 1–Wire shorted

01 = presence pulse

10 = alarming presence

pulse

11 = no presence pulse

same as sent

undefined

(The Search Accelerator Control command does not generate a response byte.)

endof the time slot reveal the value found on the 1–Wire

bus when reading.

Reset

The Reset command must be used to begin all 1–Wire

communication. The speed selection included in the

commandcode immediately takes effect. The response

byte includes a code for the reaction on the 1–Wire bus

(bits0and1)andacodeforthechiprevision(bits2to4).

If bit 5 of the response byte reads ‘1’, a programming

Foratimeslotwithoutasubsequentstrongpull–up, bit1

ofthecommandmustbesetto0. Foratimeslotimmedi-

ately followed by a strong pull–up bit 1 must be set to 1.

As soon as the strong pull–up is over, the device will

sendasecondresponsebyte, codeEFh(read1)orECh

(read 0), depending on the value found on the 1–Wire

bus when reading. The strong pull–up directly following

the single bit is used in conjunction with the Crypto

iButton.

voltage is present on the V pin, indicating that one

may try programming EPROM devices.

Single Bit

The Single Bit command is used to generate a single

time slot on the 1–Wire bus at the speed indicated by

bits 2 and 3. The type of the time slot (write zero or write

one)isdeterminedbythelogicvalueofbit4. Areaddata

time slot is identical to the write one time slot. Bits 0 and

1 of the response byte transmitted by the DS2480 at the

Search Accelerator Control

TheSearchAcceleratorControlcommandisusedtoset

or reset the Search Accelerator control flag. Bit 4 of the

command code contains the state to which the acceler-

042498 6/26

1...3 4 567 8 9...26

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与DS2480S相关器件

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DS2482-100	DALLAS	Single-Channel 1-Wire Master	获取价格
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DS2482-100_12	MAXIM	Single-Channel 1-Wire Master	获取价格
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