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參數(shù)資料
| 型號： | LP5526TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | 4 Mbit Uniform Sector, Serial Flash Memory |
| 中文描述： | LED DISPLAY DRIVER, PBGA25 |
| 封裝： | 2.54 X 2.54 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, BGA-25 |
| 文件頁數(shù)： | 12/33頁 |
| 文件大小： | 1150K |
| 代理商： | LP5526TL |
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Functionality of Color LED
Outputs (RLED, GLED, BLED)
LP5526 has one RGB/color LED output, consisting of three
individual LED output pins. Output pins can be used in
switch mode or constant current mode. Output mode can be
selected with the control register (address 00H) bit CC_SW.
If the bit is set high, then RGB outputs are in switch mode,
otherwise in constant current mode. These modes are de-
scribed later in separate chapters.
RGB LED output control can be done in three ways:
1.
Defining the expected color and brightness with internal
PWM in RGB register (address 01H)
2.
Direct setting each LED ON/OFF via RGB Control reg-
ister (address 00H)
3.
External PWM control
1. BRIGHTNESS CONTROL WITH RGB REGISTER
If the RGB LED output is used by defining the balance and
brightness in the RGB register, then one needs to set EN-
_RGB bit high and RGB_PWM bit high in the Control register
(address 00H). RSW, GSW and BSW are used to enable
each LED output, enabled when written high. CC_SW de-
fines the LED output mode. A single register is used for
defining the color and brightness for the RGB LED output.
OVL bit selects overlapping/non-overlapping mode. Overlap-
ping mode is selected when OVL = 1.
CONTROL REGISTER (00H)
Bit
Description
7
0 = Internal PWM control disabled
1 = Internal PWM control enabled
6
0 = RGB outputs disabled
1 = RGB outputs enabled
5
0 = Constant current sink mode
1 = Switch mode
3
0 = RLED disabled
1 = RLED enabled
2
0 = GLED disabled
1 = GLED enabled
1
0 = BLED disabled
1 = BLED enabled
RGB REGISTER (01H)
7:4
Color for RGB LED output
3:1
Brightness control
0
0 = Non-overlapping mode
1 = Overlapping mode
Name
RGB_PWM
EN_RGB
CC_SW
RSW
GSW
BSW
COLOR[3:0]
BRIGHT[2:0]
OVL
Brightness control is logarithmic and is programmed as fol-
lows:
Bright[2:0]
Brightness [%]
Ratio to max
brightness
0
1/64
1/32
1/16
1/8
1/4
1/2
1/1
000
001
010
011
100
101
110
111
0
1.56
3.12
6.25
12.5
25
50
100
16 colors can be selected as follows. Please note that exact color depends on RGB LED current and type. Color setting is
valid only in non-overlapping mode.
COLOR[3:0]
RED
active [%]
100
0
0
50
0
50
33
50
25
25
25
75
0
25
0
25
GREEN
active [%]
0
100
0
50
50
0
33
25
50
50
25
25
75
75
25
0
BLUE
active [%]
0
0
100
0
50
50
33
25
25
25
50
0
25
0
75
75
RGB COLOR
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
red
green
blue
yellow
cyan
magenta
white
pink
light green
light blue
orange
deep pink
spring green
lawn green
sky blue
indigo
L
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