DS28DS28E01-100 データシートの表示（PDF） - Maxim Integrated

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DS28DS28E01-100

1Kb Protected 1-Wire EEPROM with SHA-1 Engine

Maxim Integrated 

ABRIDGED DATA SHEET

DS28E01-100

1Kb Protected 1-Wire EEPROM

with SHA-1 Engine

COMMAND LEVEL:

1-Wire ROM FUNCTION COMMANDS

(SEE FIGURE 10)

DS28E01-100

AVAILABLE COMMANDS:

DATA FIELD AFFECTED:

READ ROM

MATCH ROM

SEARCH ROM

SKIP ROM

RESUME

OVERDRIVE-SKIP ROM

OVERDRIVE-MATCH ROM

64-BIT REG. #, RC-FLAG

64-BIT REG. #, RC-FLAG

64-BIT REG. #, RC-FLAG

RC-FLAG

RC-FLAG

RC-FLAG, OD-FLAG

64-BIT REG. #, RC-FLAG, OD-FLAG

DEVICE-SPECIFIC MEMORY

FUNCTION COMMANDS

(SEE FIGURE 8)

Refer to the full data sheet.

Figure 2. Hierarchic Structure for 1-Wire Protocol

MSB

8-BIT

CRC CODE

MSB

LSB MSB

Figure 3. 64-Bit Lasered ROM

48-BIT SERIAL NUMBER

POLYNOMIAL = X8 + X5 + X4 + 1

LSB

8-BIT FAMILY CODE

LSB MSB

LSB

1ST

STAGE

2ND

STAGE

3RD

STAGE

4TH

STAGE

X0

X1

X2

X3

Figure 4. 1-Wire CRC Generator

5TH

STAGE

X4

6TH

STAGE

7TH

STAGE

8TH

STAGE

X5

X6

X7

X8

INPUT DATA

Maxim Integrated

7

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