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3. TECHNICAL BRIEF
(2) Key Backlight Illumination
There are 10 blue LEDs for key backlight illumination which are driven by KEY_BL signal from
AD6525.
KEY BACKLIGHT
VBAT
R604
R605
R606
20
20
20
LD600
LD601
LD602
KEY_BL1
KEY_BL2
R607
R608
R609
R610
R611
20
20
20
20
20
LD603
LD604
LD605
LD606
LD607
Figure 3-16 Circuit Diagram of Key backlight illumination
VBAT
KEY_BL1
KEY_BL2
R612
R613
20
20
R230
KEY_BL
1.5K
LD608 LD609
- 32 -
Q202
IMX9T110
SP206
1
6
2
5
3
4
R233
100K
R234
R235
20
20
R231
R232
20
20
SP207
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