EVAL-ADP5520
Rev. 0 | Page 15 of 24
4.
On the
BackLight Config
tab, do the following:
a.
Set Bit 0 of Register 0x02 high; then program this
setting by clicking the
Program 0x02
button.
This allows the backlight to turn on due to a key press.
b.
In the
Daylight Max Current
drop-down box, select
a backlight maximum current setting (for example,
30 mA); then program this setting by clicking the
Program 0x05
button.
5.
On the
BackLight Config
tab, set Bit 7 in Register 0x00
high; then program this setting by clicking the
Program
0x00
button.
This takes the ADP5520 out of standby mode.
6.
On the motherboard, press and release the S1 switch
(Keypad A).
The backlight now turns on after the switch is pressed. You can
turn off the backlight by clearing Bit 6 in Register 0x00 (or
optionally using the backlight off timer). To turn the backlight
on again with a subsequent key press, you must first clear any
bits set in Register 0x20 through Register 0x23 on the
Keypad
Status
tab and then clear Bit 0 and Bit 1 in Register 0x00 on the
BackLight Config
tab.
