SSL3250A_3

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 03 — 30 June 2009

16 of 26

NXP Semiconductors

SSL3250A

Photo flash dual LED driver

8.7.1 Addressing

device. The address always has to be sent as the first byte after the start condition in the

There is one address byte required since 7-bit addresses are used. The last bit of the

address byte is the read/write-bit and should always be set according to the required

create an 8-bit write address of 60h and a read address of 61h.

The second byte sent to the SSL3250A is the subaddress of a specific register.

8.7.2 Data

After the subduers have been sent the data byte(s) are sent. The definition of the data

byte(s) is given in Figure 12. After each data byte an acknowledge is given and the

subduers is automatically incremented to the next subduers.

A description of the data that can be programmed in the registers is given in the register

map in Section 8.7.3.

8.7.3 Register map

01

1

0

0

0

0

R

W

MSB

LSB

014aaa288

Table 6.

Description of registers

Legend: * default register value

Address

Register

Bit

Symbol

Access

Value

Description

00h

Current control

7 to 3

MAIN_LEVEL

R/W

00000*

Off (default)

00001

Torch mode, see Section 8.3.3

00010

Torch mode, see Section 8.3.3

.....

.....

01010

Torch mode, see Section 8.3.3

01011

Torch mode, see Section 8.3.3

01100

Flash mode (armed), see Section 8.3.4

01101

Flash mode (armed), see Section 8.3.4

.....

.....

11110

Flash mode (armed), see Section 8.3.4

11111

Flash mode (armed), see Section 8.3.4

2 to 0

IND_LEVEL

R/W

000

*

Off (default)

001

Indicator on, 2.5 mA

011

Indicator on, 5 mA

.....

111

Indicator on, 17.5 mA