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DS1925 датащи(PDF) 23 Page - Maxim Integrated Products

номер детали DS1925
подробное описание детали  iButton High-Capacity Temperature Logger with 122KB Data-Log Memory
PDF  46 Pages
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производитель  MAXIM [Maxim Integrated Products]
домашняя страница  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1925 датащи(HTML) 23 Page - Maxim Integrated Products

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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
N
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?
N
Y
N
Y
Y
N
*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?
N
Y
Y
N
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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