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AS8510

Datasheet - Detailed Descr i p ti on

7.8.3 Read Command

For Read command C0=1. After the command code C0, the address of register to be read is provided from MSB to LSB. Then one or more data

bytes can be transferred from the SPI slave to the master, always from MSB to LSB. To transfer more bytes from consecutive addresses, SPI

master keeps CS signal LOW and SPI clock active as long as it desires to read data from the slave. Each bit of the command and address of the

frame is to be driven by the SPI master on the SPI clock transfer edge where SPI slave samples it on the next SPI clock edge.

Each bit of the data section of the frame is driven by the SPI slave on the SPI clock transfer edge and SPI master samples it on the next SPI

clock edge. These edges are determined as per Table 29 and examples of read command without and with address self-increment.

Figure 12. Protocol for Serial Data Read with Length = 1

Figure 13. Protocol for Serial Data Read with Length = 4

CS

SCLK

SDI

SDO

1

A6

A5

A4

A0

A1

A2

A3

D0

D1

D2

D3

D4

D5

D7

D6

Data D7 – D0 at

Address A4..A0 is

read here

CS

SCLK

SDI

SDO

1

A

6

A

5

A

4

A

0

A

1

A

2

A

3

D

0

D

1

D

2

D

3

D

4

D

5

D

7

D

6

D

0

D

1

D

2

D

3

D

4

D

5

D

6

D

0

D

1

D

2

D

3

D

4

D

5

D

6

D

7

D

7

D

0

D

1

D

2

D

3

D

4

D

5

D

6

D

7

D

0

D

1

D

2

D

3

D

4

D

5

D

6

D

7

Data D7-D0 at

Address A4-A0

is read here

Data D7-D0 at

Address A4-A0 +1

is read here

Data D7-D0 at

Address A4-A0 +2

is read here

Data D7-D0 at

Address A4-A0 +3

is read here

Data D7-D0 at

Address A4-A0 +4

is read here