Datasheet

1-Wire 4Kb EEPROM
DS24B33 Tx
PRESENCE PULSE
BUS MASTER Tx
RESET PULSE
BUS MASTER Tx ROM
FUNCTION COMMAND
DS24B33 Tx
CRC BYTE
DS24B33Tx
FAMILY CODE
(1 BYTE)
DS24B33 Tx
SERIAL NUMBER
(6 BYTES)
OD = 0
RC = 0
MASTER Tx BIT 0
RC = 0 RC = 0
OD
RESET PULSE?
YY
Y
Y
Y
Y
N
33h
READ ROM
COMMAND?
N
55h
MATCH ROM
COMMAND?
BIT 0 MATCH? BIT 0 MATCH?
N
N N
N N
N N
F0h
SEARCH ROM
COMMAND?
NN
Y
RC = 1
MASTER Tx BIT 1
MASTER Tx BIT 63
BIT 1 MATCH?
BIT 63 MATCH?
Y
Y
RC = 1
FROM MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
TO MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
DS24B33 Tx BIT 0
DS24B33 Tx BIT 0
MASTER Tx BIT 0
BIT 1 MATCH?
BIT 63 MATCH?
DS24B33 Tx BIT 1
DS24B33 Tx BIT 1
MASTER Tx BIT 1
DS24B33 Tx BIT 63
DS24B33 Tx BIT 63
MASTER Tx BIT 63
Y
FROM FIGURE 9b
TO FIGURE 9b
TO FIGURE 9b
FROM FIGURE 9b
RC = 0
Y
CCh
SKIP ROM
COMMAND?
Figure 9a. ROM Functions Flowchart
Maxim Integrated
15
DS24B33