Datasheet

DS1922L/DS1922T
Temperature Logger iButton with 8KB
Data-Log Memory
40 ______________________________________________________________________________________
MASTER Tx BIT 0
RC = 0; OD = 1 RC = 0; OD = 1
OD = 0
(SEE NOTE)
NOTE: THE OD FLAG REMAINS AT 1 IF THE DEVICE WAS ALREADY AT OVERDRIVE SPEED BEFORE THE OVERDRIVE-MATCH ROM COMMAND WAS ISSUED.
(SEE NOTE)
(SEE NOTE)
RC = 1?
Y
N
Y
A5h
RESUME
COMMAND?
N
Y
3Ch
OVERDRIVE-
SKIP ROM?
N
RC = 0
Y
CCh
SKIP ROM
COMMAND?
Y
69h
OVERDRIVE-
MATCH ROM?
N
N
OD = 0
N
OD = 0
N
MASTER Tx BIT 1
MASTER Tx BIT 63
Y
Y
RC = 1
Y
BIT 0 MATCH?
MASTER Tx
RESET?
BIT 63 MATCH?
BIT 1 MATCH?
N
Y
N
Y
MASTER Tx
RESET?
N
TO FIGURE 11a
FROM FIGURE 11a
FROM FIGURE 11a
TO FIGURE 11a
Figure 11b. ROM Functions Flowchart (continued)