1-Wire 4Kb EEPROM

______________________________________________________________________________________

11

DS24B33 Tx "1"

Y

N

AUTHORIZATION

CODE MATCH?

BUS MASTER Rx

TA1 (T[7:0]), TA2 (T[15:8]),

AND E/S BYTE

BUS MASTER Tx

TA1 (T[7:0]), TA2 (T[15:8])

55h

COPY SCRATCHPAD?

N

Y

F0h

READ MEMORY?

N

Y

DS24B33 COPIES

SCRATCHPAD DATA

TO ADDRESS

*

TO FIGURE 7a

FROM FIGURE 7a

BUS MASTER

Rx "1"s

MASTER Tx RESET?

N

Y

MASTER Tx RESET?

MASTER Tx RESET?

N

DS24B33 Tx "0"

Y

N

N

Y

AA = 1

BUS MASTER

Rx "1"s

MASTER Tx RESET?

N

Y

BUS MASTER

Rx "1"s

DS24B33 SETS MEMORY

ADDRESS = (T[15:0])

BUS MASTER Rx

DATA BYTE FROM

MEMORY ADDRESS

Y

N

N

MASTER Tx RESET?

ADDRESS < 1FFh?

N

Y

MASTER Tx RESET?

DS24B33

INCREMENTS

ADDRESS

COUNTER

Y

Figure 7b. Memory Function Flowchart (continued)