DocID025366 Rev 2

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AN4374

LED power-on at maximum current and 50% duty cycle

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Figure 11. LED1642GW and ALED1642GW brightness register: first word example

Figure 12. LED1642GW and ALED1642GW brightness register: last word example

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As last pattern, the output switch power-on has to be sent. SDI=1 on switch register

has to be sent 16 times (see previous example) to have all 16 outputs ON.

The result of the above eighteen 16-bit words is the LED power-on at ILED=36 mA and 50%

duty cycle.

Clk

SDI

LE

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

first bit

last bit

(BRT reg. output 15 = 0x0800)

Global Latch

Key

AM16861v1

Clk

SDI

LE

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

first bit

last bit

(BRT reg. output 0 = 0x0800)

Global Latch

Key

AM16860v1