Rainbow-electronics DS1631 Manual do Utilizador descarregar pdf (Página 9)

DS1631

9 of 14

2-WIRE INTERFACE TIMING Figure 6

a) Issue a "Start Convert T” or “Stop Convert T” Command

S 11

A2 A1 A0

AC7C6C5C4 A

C1 C0

Control Byte

Command Byte

START

STOP

ACK

(DS1631)

SCL

SDA

ACK

(DS1631)

AD2D6 D5 D4

D1 D0A0

AA1 1 0 1 0

100AD7A2

b) Write to the Configuration Register

S 11

Control Byte

START

SCL

SDA

ACK

(DS1631)

Command Byte

Data Byte

(from Master)

STOP

ACK

(DS1631)

ACK

(DS1631)

A1S1 1

A2 A1 A0

010 A

100

D6 D5 D4

D2 D1 D0

S1 1

A2 A1 A0

c) Read From the Configuration Register

ACK

(DS1631)

Repeat

START

SCL

SDA

Control Byte

START

Command Byte

Data Byte

(from DS1631)

STOP

NACK

(Master)

Control Byte

ACK

(DS1631)

ACK

(DS1631)

A2 A1 A0 C2

SCL

SDA

d) Write to the T

or T

S 11

Control Byte

START

ACK

(DS1631)

AC7 C6 C5 C4

C1 C0

Command Byte

ACK

(DS1631)

D6 D5

D2 D0D7D6 D5 D4

D2 D1 D0D7 AD1

LS Data Byte

(from Master)

MS Data Byte

(from Master)

STOP

ACK

(DS1631)

ACK

(DS1631)

AD2D1D0D6 D5 D4

A2 A1 A0

AC4

C2 C1C7

C6 C5A2 A1 A0

e) Read From the Temperature, T

, or T

ACK

(DS1631)

Repeat

START

SCL

SDA

S 11

Control Byte

START

Command Byte

S 11

Control Byte

MS Data Byte

(from DS1631)

…

ACK

(DS1631)

ACK

(DS1631)

ACK

(Master)

D6 D4

D2 D1 D0

LS Data Byte

(from DS1631)

STOP

…

NACK

(Master)

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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