DS1922E-F5- MAXIM [Maxim Integrated Products], DS1922E-F5- Datasheet - Page 25

• Manufacturer Part Number: DS1922E-F5-
• Description: High-Temperature Logger iButton with 8KB
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 9b. Memory/Control Function Flowchart (continued)
FROM FIGURE 9a
TO FIGURE 9a
DECISION MADE
DECISION MADE
BY DS1922E
BY MASTER
MASTER Tx RESET
High-Temperature Logger iButton with 8KB
______________________________________________________________________________________
Y
N
MEMORY ADDRESS = [T15:T0]
MASTER Rx DATA BYTE FROM
(1ST PASS); CRC-16 OF DATA
COMMAND, ADDRESS, DATA
TA1 [T7:T0], TA2 [T15:T8]
(SUBSEQUENT PASSES)
MASTER Rx CRC-16 OF
READ MEMORY [WITH
64 BITS [PASSWORD]
MEMORY ADDRESS
MASTER Tx RESET?
MASTER Tx RESET?
END OF MEMORY?
DS1922E SETS
END OF PAGE?
PW] AND CRC
ACCEPTED?
MASTER Tx
MASTER Tx
PASSWORD
CRC OK?
Y
69h
Y
Y
N
Y
Y
Y
N
N
N
N
N
MASTER Rx "1"s
INCREMENTS
ADDRESS
COUNTER
DS1922E
N
MISSION SAMPLES COUNTER,
MISSION TIMESTAMP,
64 BITS [PASSWORD]
MASTER Tx RESET?
FFh DUMMY BYTE
DS1922E CLEARS
CLEAR MEMORY
ALARM FLAGS
DS1922E SETS
MEMCLR = 1
ACCEPTED?
PROGRESS?
MASTER Tx
MASTER Tx
PASSWORD
MISSION IN
[WITH PW]
96h
Y
Y
N
Y
N
N
Y
Data-Log Memory
N
TEMPERATURE CONVERSION
DS1922E COPIES RESULT TO
FORCED CONVERSION?
DS1922E PERFORMS A
MASTER Tx RESET?
ADDRESS 020C/Dh
FFh DUMMY BYTE
PROGRESS?
MASTER Tx
MISSION IN
55h
Y
N
Y
N
Y
FROM FIGURE 9c
TO FIGURE 9c
25