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DS20006363D-page 26

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5.2.2

I2C BURST READ/WRITE

Burst Read and Write are very similar to Byte Read and Write.

Burst Read. Figure 5-6 illustrates the Burst Read. The I2C server acknowledges after each received byte and finally

sends a Not Acknowledge (NACK) followed with Stop Condition.

FIGURE 5-6:

I2C Bus Burst Read.

Burst Write. Figure 5-7 illustrates Burst Write operation. The I2C server will send the Stop Condition after the last data

byte.

FIGURE 5-7:

I2C Bus Burst Write.

T

Slave

Command

r

Slave

A

Wr

Rd

Start

Condi on

Repeat Start

Acknowledge

Master

drives Bus

Slave

drives Bus

A

A

N

P

Not Ack

Stop

Condi on

Data Byte 2

Data Byte 1

Data Byte 0

A

A

Register address to read

MSB = 1

{1'b1,register_address[6:0]}

Byte

Byte

Byte

Byte

Byte

Byte

Rd/Wr Command

Rd/Wr Command

T

Slave

Command

Wr

Start

Condi on

Stop

Master

drives Bus

Slave

drives Bus

A

A

P

Acknowledge

Data Byte 2

A

Data Byte 1

A

Data Byte 0

A

Acknowledge

Register address to write

MSB = 1

{1'b1,register_address[6:0]}

Byte

Byte

Byte

Byte

Byte

Rd/Wr Command