ADT7411ARQ データシートの表示（PDF） - Analog Devices

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ADT7411ARQ

SPI®-/I2C®-Compatible, 10-Bit Digital Temperature Sensor and 8-Channel ADC

Analog Devices 

ADT7411

CS

(START HIGH)

CS

(START LOW)

30ns MIN

A

B

C

30ns MIN

A

B

SPI LOCKED ON

THIRD RISING EDGE

C

SPI LOCKED ON

THIRD RISING EDGE

Figure 33. Serial Interface—Selecting and Locking SPI Protocol

SPI FRAMING

EDGE

SPI FRAMING

EDGE

1

9

1

9

SCL

SDA

START BY

MASTER

1

0

0

1

A2 A1 A0 R/W

P7 P6 P5 P4 P3 P2 P1 P0

FRAME 1

SERIAL BUS ADDRESS BYTE

ACK. BY

ADT7411

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY STOP BY

ADT7411 MASTER

Figure 34. I2C—Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation

1

9

1

9

SCL

SDA

1

START BY

MASTER

0

0

1 A2 A1 A0 R/W

P7

FRAME 1

SERIAL BUS ADDRESS BYTE

ACK. BY

ADT7411

1

SCL (CONTINUED)

P6 P5 P4 P3 P2 P1 P0

FRAME 2

ADDRESS POINTER REGISTER BYTE

9

ACK. BY

ADT7411

SDA (CONTINUED)

D7 D6 D5 D4 D3 D2 D1 D0

FRAME 3

DATA BYTE

ACK. BY STOP BY

ADT7411 MASTER

Figure 35. I2C—Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Register

1

9

1

9

SCL

SDA

1

START BY

MASTER

0

0

1 A2 A1 A0 R/W

D7 D6 D5 D4 D3 D2 D1 D0

ACK. BY

ADT7411

NO ACK. BY STOP BY

MASTER MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

SINGLE DATA BYTE FROM ADT7411

Figure 36. I2C—Reading a Single Byte of Data from a Selected Register

Rev. B | Page 31 of 36

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