Datasheet

DS2431
1024-Bit, 1-Wire EEPROM
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BUS MASTER Tx
TA1 (T[7:0]), TA2 (T[15:8])
APPLICABLE TO ALL R/W
MEMORY LOCATIONS.
DURATION: t
PROG
*
* 1-Wire IDLE HIGH FOR POWER.
DS2431 COPIES
SCRATCHPAD
DATA TO ADDRESS
BUS MASTER
Rx "1"s
AA = 1
BUS MASTER
Rx "1"s
MASTER Tx RESET?
N
Y
N
N
MASTER Tx RESET?
Y
MASTER Tx RESET?
BUS MASTER Tx
TA1 (T[7:0]), TA2 (T[15:8])
AND E/S BYTE
55h
COPY SCRATCHPAD?
N
Y
Y
Y
N
DS2431 Tx "0"
DS2431 Tx "1"
F0h
READ MEMORY?
N
Y
Y
N
AUTH. CODE
MATCH?
Y
N
Y
N
N
T[15:0] < 0090h?
PF = 0?
ADDRESS < 90h?
Y
COPY PROTECTED?
BUS MASTER
Rx "1"s
MASTER Tx RESET?
N
Y
DS2431 SETS MEMORY
ADDRESS = (T[15:0])
BUS MASTER Rx
DATA BYTE FROM
MEMORY ADDRESS
Y
N
N
MASTER Tx RESET?
ADDRESS < 8Fh?
N
Y
MASTER Tx RESET?
DS2431
INCREMENTS
ADDRESS
COUNTER
Y
TO FIGURE 7a
FROM FIGURE 7a
Figure 7b. Memory Function Flowchart (continued)