SSM3582ACPZ-R7 datasheet(29/58 Pages) AD

29 / 58 page

Data Sheet

SSM3582A

Rev. A | Page 29 of 58

I2C Read and Write Operations

Figure 72 shows the timing of a single-word write operation.

Every ninth clock, the SSM3582A issues an acknowledge by

pulling SDA low.

Figure 73 shows the timing of a burst mode write sequence.

This figure shows an example where the target destination

registers are two bytes. The SSM3582A knows to increment its

subaddress register every byte because the requested subaddress

corresponds to a register or memory area with a byte word

length.

The timing of a single-word read operation is shown in Figure 74.

Note that the first R/W bit is 0, indicating a write operation,

because the subaddress must still be written to set up the internal

address. After the SSM3582A acknowledges the receipt of the

subaddress, the master must issue a repeated start command,

followed by the chip address byte with the R/W set to 1 (read).

This repeated command causes the SSM3582A SDA to reverse

and to begin driving data back to the master. The master then

responds every ninth pulse with an acknowledge pulse to the

SSM3582A. Refer to Table 17 for a list of abbreviations in Figure 72

through Figure 75.

Table 17. Abbreviations for Figure 72 Through Figure 75

Symbol

Meaning

Start bit

Stop bit

Acknowledge (ACK used in Figure 72 through Figure 75) by master

Acknowledge (ACK used in Figure 72 through Figure 75) by slave

R/W

SCL

SDA

(CONTINUED)

SCL

(CONTINUED)

START BY

MASTER

FRAME1

CHIP ADDRESS BYTE

FRAME 2

SUBADDRESS BYTE

FRAME 3

DATA BYTE 1

FRAME 4

DATA BYTE 2

STOP BY

MASTER

ACK

Figure 71. I2C Read/Write Timing

START

BIT

STOP

BIT

R/W

= 0

ACK BY

SLAVE

ACK BY

SLAVE

IC ADDRESS

(7 BITS)

SUBADDRESS

(8 BITS)

DATA BYTE 1

(8 BITS)

Figure 72. Single-Word I2C Write Format

CHIP ADDRESS,

R/W = 0

SUBADDRESS

DATA-

WORD 1

DATA-

WORD 2

…

Figure 73. Burst Mode I2C Write Format

CHIP

ADDRESS,

R/W = 0

CHIP

ADDRESS,

R/W = 1

SUBADDRESS

DATA

BYTE 1

DATA

BYTE N

Figure 74. Single-Word I2C Read Format

CHIP

ADDRESS,

R/W = 0

CHIP

ADDRESS,

R/W = 1

SUBADDRESS

DATA-

WORD 1

...

Figure 75. Burst Mode I2C Read Format

SSM3582ACPZ-R7 数据表(PDF) 29 Page - Analog Devices

SSM3582ACPZ-R7 数据表(HTML) 29 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

数据表下载

链接网址

SSM3582ACPZ-R7 数据表(PDF) 29 Page - Analog Devices

SSM3582ACPZ-R7 数据表(HTML) 29 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

数据表 下载

链接网址

数据表下载