TSL2672

DIGITAL PROXIMITY DETECTOR

TAOS133 − MAY 2012

17

The LUMENOLOGY

r Company

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Copyright

E 2012, TAOS Inc.

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Command Register

The command register specifies the address of the target register for future read and write operations, as well

as issues special function commands.

Table 4. Command Register

6

75

4

ADDR/SF

2

31

0

COMMAND

CMD

TYPE

Reset

0x00

FIELD

BITS

DESCRIPTION

CMD

7

Select Command Register. Must write as 1 when addressing COMMAND register.

TYPE

6:5

Selects type of transaction to follow in subsequent data transfers:

FIELD VALUE

DESCRIPTION

00

Repeated byte protocol transaction

01

Auto-increment protocol transaction

10

Reserved — Do not use

11

Special function — See description below

Transaction type 00 will repeatedly read the same register with each data access.

Transaction type 01 will provide an auto-increment function to read successive register bytes.

ADDR/SF

4:0

Address field/special function field. Depending on the transaction type, see above, this field either

specifies a special function command or selects the specific control-status-data register for subsequent

read and write transactions. The field values listed below apply only to special function commands:

FIELD VALUE

DESCRIPTION

00100

Interrupt set — forces an interrupt

00101

Proximity interrupt clear

other

Reserved — Do not write

The interrupt set special function command sets the interrupt bits in the status register (0x13). For the

interrupt to be visible on the INT pin, the proximity interrupt enable bit (PIEN) in the enable register (0x00)

must be asserted.

The interrupt set special function must be cleared with an interrupt clear special function. The proximity

interrupt clear special function clears any pending interrupt and is self clearing.