TSL4531

DIGITAL AMBIENT LIGHT SENSOR

TAOS112 − OCTOBER 2011

7

The LUMENOLOGY

r Company

r

r

Copyright

E 2011, TAOS Inc.

www.taosinc.com

a set of registers that provide access to device control functions and output data. The devices support the 7-bit

During a write operation, the first byte written is a command byte followed by data. In a combined protocol, the

first byte written is the command byte followed by reading a series of bytes. If a read command is issued, the

register address from the previous command will be used for data access. Likewise, if the MSB of the command

is not set, the device will write a series of bytes at the address stored in the last valid command with a register

address. The command byte contains either control information or a 5-bit register address. The control

commands can also be used to clear interrupts.

A

Acknowledge (0)

N

Not Acknowledged (1)

P

Stop Condition

R

Read (1)

S

Start Condition

Sr

Repeated Start Condition

W

Write (0)

...

Continuation of protocol

Master-to-Slave

Slave-to-Master

W

7

Data Byte

Slave Address

S

1

AA

A

8

11

1

8

Command Code

1

P

1

...

R

7

Data

Slave Address

S

1

AA

A

8

11

1

8

Data

1

P

1

...

W

7

Slave Address

Slave Address

S

1

AR

A

8

11

1

7

1

1

Command Code

Sr

1

A

Data

A

A

81

8

Data

1

P

1

...