EVAL-ADP5520
Rev. 0 | Page 10 of 24
c.
In the
LED 3 Current
drop-down box, select the LED 3
sink current setting (for example, 14 mA); then pro-
gram this setting by clicking the
Program 0x16
button.
d.
In the
LED (ALL) Fade OUT Time
drop-down box,
select a fade-out time (for example, 1.8 sec).
In the
LED (ALL) Fade IN Time
drop-down box,
select a fade-in time (for example, 1.8 sec).
e.
Then program these settings by clicking the
Program
0x13
button.
Set Bit 3 (square fade) in Register 0x11 high.
Set Bit 0, Bit 1, and Bit 2 in Register 0x11 high.
Then program these settings by clicking the
Program
0x11
button.
All three auxiliary LEDs start to turn on and fade into
the current programmed levels.
f.
To turn off and fade out the LEDs, clear Bit 0, Bit 1,
and Bit 2 in Register 0x11; then program these settings
by clicking the Program 0x11 button.
All three auxiliary LEDs start to turn off and fade out
to zero.
You can experiment with different fade-in/fade-out times.
AUXILIARY LED BLINKING
First press the reset button (S17) on the evaluation board to put
the device in a known state; then complete the following steps.
1.
On the motherboard, do the following:
a.
Move the jumper on Block J8 to the LED 2 position.
b.
Move the jumper on Block J4 to the LED 3 position.
2.
On the
BackLight Config
tab, set Bit 7 in Register 0x00
high; then program this setting by clicking the
Program
0x00
button.
3.
On the
Aux LEDs Config
tab, do the following:
a.
In the
LED 1 Current
drop-down box, select the LED
1 sink current (for example, 14 mA); then program
this setting by clicking the
Program 0x14
button.
b.
In the
LED 2 Current
drop-down box, select the LED
2 sink current (for example, 14 mA); then program
this setting by clicking the
Program 0x15
button.
c.
In the
LED 3 Current
drop-down box, select the LED
3 sink current (for example, 14 mA); then program
this setting by clicking the
Program 0x16
button.
d.
In the
LED (All) ON Timer
drop-down box, select a
blink on time (for example, 1.2 sec).
In the
LED 3 OFF Timer
drop-down box, select a
blink off time for LED 3 (for example, 1.2 sec).
In the
LED 2 OFF Timer
drop-down box, select a
blink off time for LED 2 (for example, 1.2 sec).
On the
LED 1 OFF Timer
drop-down box, select a
blink off time for LED 1 (for example, 1.2 sec).
Then program these settings by clicking the
Program
0x12
button.
e.
Set Bit 0, Bit 1, and Bit 2 in Register 0x11 high; then
program these settings by clicking the
Program 0x11
button.
All three auxiliary LEDS start to blink on and off.
You can also enable the fade timers for smooth transition
between on and off.
