DS24B33+ MAXIM [Maxim Integrated Products], DS24B33+ Datasheet - Page 10

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

4Kb 1-Wire EEPROM with
200k Write/Erase Cycles
Figure 7a. Memory Function Flowchart
10
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SCRATCHPAD
INCREMENTS
BUS MASTER
DS24B33
OFFSET
Rx "1"s
N
N
DS24B33 SETS SCRATCHPAD
AND DATA BYTES AS THEY
BUS MASTER Tx MEMORY
ARRAY TARGET ADDRESS
TA1 (T[7:0]), TA2 (T[15:8])
TO SCRATCHPAD OFFSET
BUS MASTER Tx EEPROM
DS24B33 CLEARS PF, AA
DS24B33 SETS (E[4:0]) =
WERE SENT BY THE BUS
DS24B33 Tx CRC-16 OF
MASTER Tx DATA BYTE
COMMAND, ADDRESS,
FUNCTION COMMAND
SCRATCHPAD OFFSET
WRITE SCRATCHPAD?
SCRATCHPAD OFFSET
MASTER Tx RESET?
MASTER Tx RESET?
OFFSET = (T[4:0])
= 11111b?
MASTER
0Fh
FLOWCHART (FIGURE 9)
TO ROM FUNCTIONS
Y
N
Y
Y
N
Y
PARTIAL BYTE?
FROM ROM FUNCTIONS
FLOWCHART (FIGURE 9)
PF = 1
Y
SCRATCHPAD
INCREMENTS
BUS MASTER
DS24B33
OFFSET
Rx "1"s
N
N
N
DS24B33 SETS SCRATCHPAD
BUS MASTER Rx DATA BYTE
TA1 (T[7:0]), TA2 (T[15:8]),
TO SCRATCHPAD OFFSET
READ SCRATCHPAD?
SCRATCHPAD OFFSET
MASTER Tx RESET?
MASTER Tx RESET?
OFFSET = (T[4:0])
BUS MASTER Rx
AND E/S BYTE
= 11111b?
AAh
Y
N
Y
Y
N
Y
FROM FIGURE 7b
TO FIGURE 7b