Datasheet

DS1922L/DS1922T
Temperature Logger iButton with 8KB
Data-Log Memory
18 ______________________________________________________________________________________
ADDRESS BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 FUNCTION ACCESS*
0219h 0 10 Seconds Single Seconds
021Ah 0 10 Minutes Single Minutes
021Bh 0 12/24
20 Hour
AM/PM
10 Hour Single Hours
021Ch 0 0 10 Date Single Date
021Dh CENT 0 0
10
Months
Single Months
021Eh 10 Years Single Years
Mission
Timestamp
R R
021Fh (No Function; Reads 00h) — R R
0220h Low Byte
0221h Center Byte
0222h High Byte
Mission
Samples
Counter
R R
0223h Low Byte
0224h Center Byte
0225h High Byte
Device
Samples
Counter
R R
0226h Configuration Code Flavor R R
0227h EPW PW Control R/W R
0228h First Byte
… …
022Fh Eighth Byte
Read
Access
Password
W —
0230h First Byte
… …
0237h Eighth Byte
Full
Access
Password
W —
0238h
…
023Fh
(No Function; All These Bytes Read 00h) — R R
Figure 6. Register Pages Map (continued)
* The left entry in the ACCESS column is valid between missions. The right entry shows the applicable access type while a
mission is in progress.