DS24B33+ MAXIM [Maxim Integrated Products], DS24B33+ Datasheet - Page 15

• Manufacturer Part Number: DS24B33+
• Description: 4Kb 1-Wire EEPROM with 200k Write/Erase Cycles
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 9a. ROM Functions Flowchart
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FUNCTION COMMAND
BUS MASTER Tx ROM
SERIAL NUMBER
FAMILY CODE
COMMAND?
DS24B33 Tx
DS24B33 Tx
DS24B33Tx
READ ROM
(6 BYTES)
CRC BYTE
(1 BYTE)
RC = 0
33h
Y
FROM MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
N
MASTER Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
BIT 0 MATCH?
BIT 1 MATCH?
MATCH ROM
COMMAND?
RC = 0
RC = 1
55h
Y
Y
Y
Y
TO MEMORY FUNCTIONS
FLOWCHART (FIGURE 7)
PRESENCE PULSE
BUS MASTER Tx
RESET PULSE?
RESET PULSE
DS24B33 Tx
N
N
N
Y
N
OD
4Kb 1-Wire EEPROM with
N
N
N
DS24B33 Tx BIT 63
DS24B33 Tx BIT 63
MASTER Tx BIT 63
200k Write/Erase Cycles
DS24B33 Tx BIT 0
DS24B33 Tx BIT 0
DS24B33 Tx BIT 1
DS24B33 Tx BIT 1
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
SEARCH ROM
BIT 0 MATCH?
BIT 1 MATCH?
COMMAND?
RC = 0
RC = 1
N
F0h
Y
Y
Y
Y
OD = 0
N
COMMAND?
SKIP ROM
RC = 0
CCh
Y
N
FROM FIGURE 9b
FROM FIGURE 9b
TO FIGURE 9b
TO FIGURE 9b
15