VD5377 datasheet(42/88 Pages) STMICROELECTRONICS

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Additional features

VD5377

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Doc ID 022952 Rev 2

7.3

BACKLED[2:0]

Three pads are provided to optionally drive up to three backlight LEDs. Each pad is a 4 mA

(current limited), digital I/O with open-drain capability which can drive up to three LEDs

independently or can be combined to drive a single LED up to 12 mA (see Figure 18.). Each

output can be controlled by an independent PWM controller to provide a versatile dimming

function. When combined, all three pads are driven by PWM0. The PWM signals are

automatically gated during pixel integration to ensure there is no light pollution of the

tracking function. BACKLED control registers are shown in Table 26. These pads can also

be used as GPIO.

Note:

The BACKLED[2:0] pads are tri-state by default and should be connected to ground if not

used.

ADAPTCPI_RANGES

adaptcpi_log_

motion_range

2:0

PRW

Log value of motion range from

which the CPI is adaptive (that is

max motion = min +

2^adaptcpi_log_motion_range)

0 = motion range = 1

1 = motion range = 2

2 = motion range = 4

3 = motion range = 8

4 = motion range = 16

5 = motion range = 32

6 = motion range = 64

7 = motion range = 128

adaptcpi_log_

scaling_range

6:4

PRW

Log value of motion scaling range

from which the CPI is adaptive

(that is max scaling = min +

2^adaptcpi_log_scaling_range)

0 = scaling range = 1

1 = scaling range = 2

2 = scaling range = 4

3 = scaling range = 8

4 = scaling range = 16

5 = scaling range = 32

6 = scaling range = 64

7 = scaling range = 128

Table 25. Adaptive CPI (continued)

Addr

(Hex)

Signal name

Bit

Type

Default

(Hex)

Comment

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