DS1922L_11 Datasheet, PDF (40/52 Pages) Maxim Integrated Products – Temperature Logger iButton with 8KB Data-Log Memory

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