DS1992 Просмотр технического описания (PDF) - Maxim Integrated

Номер в каталоге

Компоненты Описание

производитель

DS1992

1Kb/4Kb Memory iButton

Maxim Integrated 

Figure 1. DS1992/DS1993 BLOCK DIAGRAM

1-WIRE

PORT

1-W

ROM

FUNCTION

CONTROL

64-BIT

LASERED

ROM

PARASITE-

POWERED

CIRCUITRY

DS1992/DS1993

MEMORY

FUNCTION

CONTROL

256-BIT

SCRATCHPAD

3V LITHIUM

SRAM

16 PAGES of 256-

BITs (1993)

4 PAGES of 256-

BITs (1992)

Figure 2. 64-BIT LASERED ROM

MSB

8-Bit CRC Code

48-Bit Serial Number

MSB

LSB MSB

LSB

8-Bit Family Code

(06h)1993

(08h)1992

LSB MSB

LSB

Figure 3. 1-Wire CRC CODE

Polynomial = X8 + X5 + X4 + 1

1st

2nd

3rd

4th

STAGE STAGE STAGE STAGE

X0

X1

X2

X3

5th

STAGE

X4

6th

7th

8th

STAGE STAGE STAGE

X5

X6

X7

X8

INPUT DATA

3 of 17

Share Link: