TSL2581, TSL2583

LIGHT-TO-DIGITAL CONVERTER

TAOS134A − JULY 2012

10

r

r

Copyright

E 2012, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

Command Register

The command register specifies the address of the target register for subsequent read and write operations and

contains eight bits as described in Table 3. The command register defaults to 00h at power on.

Table 3. Command Register

6

75

4

ADDRESS

2

31

0

CMD

TRANSACTION

Reset

00h

Bit :

FIELD

BIT

DESCRIPTION

CMD

7

Select command register. Must write as 1 when addressing COMMAND register.

Select type of transaction to follow in subsequent data transfers:

FIELD VALUE

DESCRIPTION

00

Repeated byte protocol transaction

TRANSACTION

6:5

01

Auto-increment protocol transaction

TRANSACTION

6:5

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.

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-register for following write and

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

FIELD VALUE

DESCRIPTION

00000

Reserved. Write as 0000b.

ADDRESS

40

00001

Clear any pending interrupt and is a write−once−to−clear bit

ADDRESS

4:0

00010

When the Timing Register is set to 00h, a SendByte command with the ADDRESS field

set to 0010b will stop a manual integration. The actual length of the integration cycle

may be read in the MANUAL INTEGRATION TIMER Register.

00011

When the Timing Register is set to 00h, a SendByte command with the ADDRESS field

set to 0011b will start a manual integration. The actual length of the integration cycle

may be read in the MANUAL INTEGRATION TIMER Register.

x11xx

Reserved. Write as 11xxb.

interrupts.