DS1820S Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

DS1820S

1–Wire™ Digital Thermometer

Dallas Semiconductor -> Maxim Integrated 

ROM FUNCTIONS FLOW CHART Figure 6

MASTER TX

RESET PULSE

DS1820 TX

PRESENCE

PULSE

MASTER TX ROM

FUNCTION COMMAND

33h

N

READ ROM

COMMAND

Y

55h

N

MATCH ROM

COMMAND

Y

DS1820 TX FAMILY

CODE

1 BYTE

MASTER TX BIT 0

DS1820 TX

SERIAL NUMBER

6 BYTES

DS1820 TX

CRC BYTE

BIT 0

N

MATCH?

Y

MASTER TX BIT 1

F0h

N

SEARCH ROM

COMMAND

Y

DS1820 TX BIT 0

DS1820 TX BIT 0

MASTER TX BIT 0

N

BIT 0

MATCH?

Y

DS1820 TX BIT 1

DS1820 TX BIT 1

MASTER TX BIT 1

ECh

N

ALARM SEARCH

COMMAND

Y

ALARM

N

CONDITION

?

Y

BIT 1

N

MATCH?

Y

N

BIT 1

MATCH?

Y

MASTER TX BIT 63

N

BIT 63

MATCH?

Y

DS1820 TX BIT 63

DS1820 TX BIT 63

MASTER TX BIT 63

N

BIT 63

MATCH?

Y

DS1820

CCh

N

SKIP ROM

COMMAND

Y

MASTER TX MEMORY OR CONTROL

FUNCTION COMMAND

030598 7/27

Share Link: