TSL4531 TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS], TSL4531 Datasheet - Page 7

• Manufacturer Part Number: TSL4531
• Description: DIGITAL AMBIENT LIGHT SENSOR
• Manufacturer: TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

I
The LUMENOLOGY r Company
A
N
P
R
S
Sr
W
...
2
1
S
C Protocol
Slave Address
Interface and control are accomplished through an I
a set of registers that provide access to device control functions and output data. The devices support the 7-bit
I
The I
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.
The I
review the NXP I
2
Acknowledge (0)
Not Acknowledged (1)
Stop Condition
Read (1)
Start Condition
Repeated Start Condition
Write (0)
Continuation of protocol
Master-to-Slave
Slave-to-Master
C addressing protocol.
2
2
C bus protocol was developed by Philips (now NXP). For a complete description of the I
C standard provides for three types of bus transaction: read, write, and a combined protocol (Figure 6).
7
1
S
1
S
Slave Address
Slave Address
1
W
2
C design specification at http://www.i2c−bus.org/references/.
A
1
7
7
Command Code
I
2
C Read Protocol — Combined Format
W
1
1
R
8
r
A
A
1
1
Figure 6. I
Command Code
www.taosinc.com
1
A
I
I
2
2
C Write Protocol
C Read Protocol
Data
Sr
1
8
8
2
C Protocols
2
C serial compatible interface (standard or fast mode) to
Slave Address
1
A
1
A
7
Data
8
DIGITAL AMBIENT LIGHT SENSOR
Data Byte
Data
8
8
r
1
R
1
A
1
A
1
A
1
A
Data
8
...
...
Copyright E 2011, TAOS Inc.
TAOS112 − OCTOBER 2011
2
C protocol, please
1
P
1
P
1
A
TSL4531
...
1
P
7