MBI5029 datasheet(7/31 Pages) ETC1

7 / 31 page

16-Bit Constant Current LED Sink Driver with

LED Error Detection and Run-Time Current Adjustment

April 2005, VA.02

- 7 -

MBI5029

Switching to Special Mode

The above shows an example of the signal sequence that can set the next operation mode of MBI5029 to be the

Special Mode. The LE/MOD/CA active pulse here would not latch any serial data.

Note:

After entering the Special Mode, MBI5029 can detect LED error and adjust current gain.

Writing Configuration Code (In Special Mode)

In the Special Mode, by sending the positive pulse of LE/MOD/CA, the content of the Shift Register with a

Configuration Code will be written to the 16-bit Configuration Latch.

Reading Error Status Code (In Special Mode)

When MBI5029 is working in the Special Mode, the above signal sequence example can let a system controller

read the Error Status codes via the pin SDO.

LE/MOD/CA

CLK

/SW/

: don’t care

Bit14

Error Status Code

Bit13 Bit12 Bit11

CLK

SDO

/SW/

Bit15

At least 2 µs

N = 0

Bit15 Bit14 Bit13 Bit12 Bit11

Bit3

Bit2

Bit1

Bit0

CLK

LE/MOD/CA

SDI

Bit10

16-Bit Configuration Code

MBI5029 Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers