DS1922E-F5#【PDF 42/44 页】IBUTTON TEMP LOGGER 4KBit F5

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DS1922E

iButton High-Temperature Logger with

8KB Data-Log Memory

With only a single device connected to the bus master,

the communication of step 2 looks like this:

MASTER MODE

DATA (LSB FIRST)

(Reset)

(Presence)

CCh

0Fh

00h

02h

<25 Data Bytes>

<7 FFh Bytes>

(Reset)

(Presence)

CCh

AAh

00h

02h

1Fh

<32 Data Bytes>

(Reset)

(Presence)

CCh

99h

00h

COMMENTS

Reset pulse

Presence pulse

Issue “Skip ROM ” command

Issue “Write Scratchpad” command

TA1, beginning offset = 00h

TA2, address = 0200h

Write 25 bytes of data to scratchpad

Write through the end of the scratchpad

Reset pulse

Presence pulse

Issue “Skip ROM ” command

Issue “Read Scratchpad” command

Read TA1, beginning offset = 00h

Read TA2, address = 0200h

Read E/S, ending offset = 1Fh, flags = 0h

Read scratchpad data and verify

Reset pulse

Presence pulse

Issue “Skip ROM ” command

Issue “Copy Scratchpad” command

TA1

02h

TA2

(AUTHORIZATION CODE)

1Fh

<8 FFh Bytes>

(Reset)

(Presence)

E/S

Send dummy password

Reset pulse

Presence pulse

Step 3: Start the new mission.

With only a single device connected to the bus master,

the communication of step 3 looks like this:

If step 3 was successful, the MIP bit in the General

Status register is 1, the MEMCLR bit is 0, and the mis-

sion start delay counts down.

MASTER MODE

DATA (LSB FIRST)

(Reset)

(Presence)

CCh

<8 FFh Bytes>

FFh

(Reset)

(Presence)

COMMENTS

Reset pulse

Presence pulse

Issue “Skip ROM ” command

Issue “Start Mission ” command

Send dummy password

Send dummy byte

Reset pulse

Presence pulse

Maxim Integrated

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DS1922L-F5# 功能描述:iButton Temp Logger Ibutton w/8Kb Datalog Mem RoHS:否存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated

DS1922L-F5#A20 功能描述:iButton RoHS:否存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated

DS1922L-F5#A22 功能描述:iButton RoHS:否存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated

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