Datasheet

ManualsBrandsANALOG DEVICES ManualsPMICsADT7411ARQZ

ADT7411

Rev. B | Page 31 of 36

A B

(START HIGH)

SPI LOCKED ON

THIRD RISING EDGE

SPI FRAMING

EDGE

A B

(START LOW)

SPI LOCKED ON

THIRD RISING EDGE

SPI FRAMING

EDGE

02882-032

30ns MIN

Figure 33. Serial Interface—Selecting and Locking SPI Protocol

01100 R/W

SCL

SDA

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY

ADT7411

ACK. BY

ADT7411

STOP BY

MASTER

START BY

MASTER

A2A1A P7P6P5P4P3P2P1P0

191

02882-033

Figure 34. I

C—Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

ADDRESS POINTER REGISTER BYTE

ACK. BY

ADT7411

ACK. BY

ADT7411

ACK. BY

ADT7411

STOP BY

MASTER

FRAME 3

DATA BYTE

SDA (CONTINUED)

SCL (CONTINUED)

SCL

START BY

MASTER

1 0 0 1 A2 A1 A0 P7 P6 P5 P4 P3 P2 P1 P0

D7 D6 D5 D4 D3 D2 D1 D0

R/W

191

02882-034

Figure 35. I

C—Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Register

1SDA

START BY

MASTER

STOP BY

MASTER

NO ACK. BY

MASTER

ACK. BY

ADT7411

SCL

0 0 1 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

SINGLE DATA BYTE FROM ADT7411

191

02882-035

Figure 36. I

C—Reading a Single Byte of Data from a Selected Register