DS1925 datasheet(23/46 Pages) MAXIM

부품명	DS1925

상세설명	iButton High-Capacity Temperature Logger with 122KB Data-Log Memory

PDF	46 Pages

Scroll/Zoom	100%

제조업체	MAXIM [Maxim Integrated Products]

홈페이지	https://www.maximintegrated.com/en.html

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23 / 46 page

Figure 9c. Memory/Control Function Flowchart—XPC Subcommands Flowchart (continued)

DS1925

iButton High-Capacity Temperature Logger

with 122KB Data-Log Memory

www.maximintegrated.com

Maxim Integrated │ 23

99h

XPC COPY

SCRPD.

BBh

XPC STOP

MISSION?

FROM FIGURE 9

2nd PART, XPC

MASTER Rx CRC16

MASTER Tx

TA1 (T7:T0), TA2 (T15:T8)

MASTER WAITS

(tLSTD OR tLSTD + tSRTC) +

MASTER Tx

FFh RELEASE BYTE

DS1925 COPIES

SCRATCHPAD DATA TO

MEMORY

MASTER WAITS tSTD

MASTER Tx E/S BYTE

MASTER Rx REPEAT

RESULT BYTE

PASSWORD

ACCEPTED?

*STRONG PULLUP REQUIRED

MASTER Tx 64-BITS

[PASSWORD]

MASTER

Tx RESET?

MASTER Tx 64-BITS

[PASSWORD]

MASTER Rx CRC16

MASTER Tx

FFh RELEASE BYTE

DS1925 SETS

MIP = 0, WFTA = 0,

WRITE STOP RTC VALUE

TO MISSION BACKUP

MASTER Rx REPEAT

RESULT BYTE

PASSWORD

ACCEPTED?

MASTER

Tx RESET?

+ANY DS1925 DEVICE THAT IS IN AN UNKNOWN STATE SHOULD BE ASSUMED TO REQUIRE THE

ADDITIONAL DELAY OF tSRTC TO ENSURE PROPER OPERATION UNTIL THE DEVICE STATE IS ESTABLISHED

BY COMMAND OR QUERY. FAILURE TO DO SO MAY CAUSE THE DEVICE TO EXPERIENCE A POWER-ON

RESET OR BATTERY-FAIL EVENT, SET THE BOR ALARM FLAG, AND DISABLE DEVICE FEATURES.

AUTH

CODE

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